With a foothold established, we enumerate the file system to locate the user.txt flag. It is typically found in the home directory of a standard user.
Update your local management file ( /etc/hosts ) to resolve these domains cleanly: 10.129.x.x hackfail.htb dev.hackfail.htb api.hackfail.htb Use code with caution. 2. Foothold: From Code Audit to Remote Code Execution
You forge the signature. id works — uid=33(www-data) . You get a reverse shell.
Username: failadmin Password: n3v3r_g0nn4_g1v3_y0u_up hackfail.htb
An nmap scan reveals the following open ports:
Start with a standard aggressive Nmap scan to discover open ports and running services. nmap -sC -sV -A -oN nmap_report.txt hackfail.htb Use code with caution. The scan reveals two primary ports of interest:
Here’s a custom piece — a short narrative / walkthrough-style piece — inspired by the machine name : With a foothold established, we enumerate the file
With access to the host or a higher-privileged container, check your environment privileges. Run sudo -l to see if the user can execute any commands as root without a password.
: Typically running OpenSSH on Linux, used later for stable shell access once credentials are recovered.
I spent two hours trying to find an exotic 0-day for the custom web app, only to realize the "Admin" portal had a robots.txt file pointing directly to a /backup directory. Don't forget your web enumeration basics! Phase 2: Gaining a Foothold (The Script Kiddie Trap) You get a reverse shell
Succeeding on this box requires a transition away from automated vulnerability scanners. Security researchers must use a combination of precise system enumeration, source code auditing, and systematic post-exploitation scripting.
However, this approach does not directly yield root access on Falafel. For this machine, the is the critical privilege escalation vector.