Funhxx17.zip -

After gaining a shell as a low-privileged user (often www-data or tom ): Check for binaries that can be run as root.

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

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). After gaining a shell as a low-privileged user

Running nmap reveals open ports, typically 21 (FTP) , 22 (SSH) , and 80 (HTTP) . Upload it back to the server

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