> 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/linux-easy/greenhorn-hackthebox-writeup.md). # Greenhorn HackTheBox Writeup Greenhorn HackTheBox Easy Linux machine writeup covering Discovering embedded passwords in Git repositories, Unhashed SHA-512 passwords, Pluck Exploitation, Decrypting pixelated passwords (using DEPIX {% embed url="" %} {% hint style="warning" %} **Skills:** * Discovering embedded passwords in Git repositories * Unhashed SHA-512 passwords * Pluck Exploitation * Decrypting pixelated passwords (using DEPIX) {% endhint %} ## Reconnaissance **Workspace Setup:** Set up the workspace by creating three folders to store important content, exploits, and Nmap reconnaissance results.
**VPN Connectivity Check** Check VPN connectivity to ensure stable communication with the target machine.
**Open Port Discovery with Nmap:** Enumerate open ports and export the results to the "allPorts" file in the Nmap directory: ```bash nmap -p- --open -sS --min-rate 5000 -vvv -n -Pn 10.10.11.25 -oG allPorts ```
**Open Port Analysis with extractPorts:** Use the extractPorts function to display open ports in a concise format and copy them to the clipboard (22,80,3000)
**Port Version Scan with Nmap:** Use Nmap to scan service versions and save the output in the "targeted" file: ```bash nmap -sCV -p80,22,3000 10.10.11.25 -oN targeted ```
To resolve domain names into IP addresses via DNS, insert the domain name associated with its IP address into the `/etc/hosts` file.
### **Password Discovery:** On port 3000 we find a Git-like exposed service, similar to GitHub, but intended for internal corporate use
We proceed to create an account
Among the project files we find a file containing a password in "`pass.php`":
``` d5443aef1b64544f3685bf112f6c405218c573c7279a831b1fe9612e3a4d770486743c5580556c0d838b51749de15530f87fb793afdcc689b6b39024d7790163 ```
This hash is in SHA512. After decryption, we obtain the password **`iloveyou1`**. {% embed url="" %}
## Pluck CMS Vulnerability On port 80 we find a Pluck web service.
The `login.php` file requires a password to access the manager interface.
The content manager has a version `4.7.18`, vulnerable to remote code execution (RCE).
{% embed url="" %} ### Fase d'exploitation: 1. Clone the repository containing the exploit script: ```bash git clone https://github.com/Rai2en/CVE-2023-50564_Pluck-v4.7.18_PoC.git cd CVE-2023-50564_Pluck-v4.7.18_PoC ``` 2. We modify the `poc.py` script with the server IP address and the password "*iloveyou1*".
2. Next, create a `payload.zip` file containing the malicious payload, with the `` and port fields adjusted to match our listener.
5. We run the exploitation script: ```bash python poc.py /home/jordan/......./payload.zip ```
At the same time, we open a listening session on port `4444` with Netcat and gain access to the server as user `www-data`.
By inspecting the `/etc/passwd` file, we discover the user "junior". We succeed in connecting with the password **iloveyou1**:
### user.txt Flag Obtained:
## Privilege Escalation 1. We locate the PDF file: `Using OpenVAS.pdf`. 2. Transfer the file using Python 3 by running: ```bash python3 -m http.server 1234 ```
3. We download the PDF file with the following command: 
wget http://10.10.11.25:1234/Using%20OpenVAS.pdf
When opening this file, we discover the pixelated password for the administrator account
### Password decryption: To crack the hidden password, we use Depix software: {% embed url="" %}
```bash git clone https://github.com/spipm/Depix cd Depix ``` Next, we execute the command: ```bash python3 depix.py / -p pixel.png / -s images/searchimages/debruinseq_notepad_Windows10_closeAndSpaced.png / -o /home/jordan/Desktop/password.png ```
The decrypted password is:
`sidefromsidetheothersidesidefromsidetheotherside` We log in as root user with this password.
### Flag root :)
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