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)
Because the unzipping process often runs with high privileges (or as a user with write access to the webroot), you can create a malicious zip file containing a symbolic link . FUNHXX17.zip
Look for writable scripts in /etc/crontab that are executed by root. FUNHXX17
After gaining a shell as a low-privileged user (often www-data or tom ): Check for binaries that can be run as root. After gaining a shell as a low-privileged user
Most write-ups note that FTP allows Anonymous login . Inside the FTP directory, you will find FUNHXX17.zip among other files.
Depending on the version of the VM you are running, it may be vulnerable to recent Linux kernel exploits.