The core "trick" of this machine involves how the system handles this specific zip file.
Some versions of this challenge require you to crack the password of FUNHXX17.zip using fcrackzip or john with the rockyou.txt wordlist. The password is often found to be "p@ssword" or similar simple variations. 3. Initial Access Once unzipped by the system:
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) FUNHXX17.zip
Scanning the web server (Port 80) usually reveals a directory like /backups/ where this same zip file might be hosted or referenced. 2. Exploiting FUNHXX17.zip
Depending on the version of the VM you are running, it may be vulnerable to recent Linux kernel exploits. The core "trick" of this machine involves how
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 .
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. FUNHXX17.zip
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.
