Funhxx17.zip May 2026

Running nmap reveals open ports, typically 21 (FTP) , 22 (SSH) , and 80 (HTTP) .

The core "trick" of this machine involves how the system handles this specific zip file.

Create a symlink to a sensitive file (like /root/root.txt or /etc/shadow ) or a directory. Compress the symlink using the --symlinks flag in zip . Upload it back to the server. FUNHXX17.zip

This machine focuses on insecure file handling and exploitation of automated scripts. The FUNHXX17.zip file is the central piece of the initial exploitation phase.

If the zip contained a , you simply navigate to the location where the script was extracted to trigger a connection back to your listener ( nc -lvnp 4444 ). 4. Privilege Escalation Running nmap reveals open ports, typically 21 (FTP)

FUNHXX17.zip is a target file associated with the (sometimes referred to as Funbox 11 or UnderTheGround) Capture The Flag (CTF) machine, available on platforms like Vulnhub and OffSec's Proving Grounds. Write-up: Funbox UnderTheGround (FUNHXX17.zip)

If you used a symlink, you can now read the linked file through the web server. Compress the symlink using the --symlinks flag in zip

The machine runs a background cron job or script that automatically processes/unzips files placed in certain directories (like /var/www/html/uploads or the FTP upload folder).