Cct2019 Tryhackme Direct

The CCT2019 room on TryHackMe is a unique set of legacy challenges originally built for the U.S. Navy Cyber Competition Team. Unlike typical "speed-run" CTFs, this room is a structured assessment that prioritizes analytical depth, verification, and reasoning under pressure. ⚓ New Challenge Complete: CCT2019 on TryHackMe

I just wrapped up CCT2019, and it was a refreshing change of pace from the standard "capture the flag" format. These challenges were originally designed for the U.S. Navy Cyber Competition Team, and the shift in focus from speed to methodology was clear.

This room doesn't just ask "can you find the flag?"—it asks "can you prove your findings?" Key Takeaways & Skills Tested:

Deep PCAP Analysis: Navigating complex traffic captures with intentional "rabbit holes" designed to mislead.

Traffic Reconstruction: Moving beyond automated tools to manually recover payloads from raw captures.

Reverse Engineering: Analyzing binary execution logic to understand how a program works, rather than just extracting strings.

Forensics & Layered Crypto: Solving multi-stage puzzles where the output of one step is the vital key for the next.

The "Zero Trust" MindsetThe most valuable part of this room was the requirement to question every artifact. Nothing was taken at face value; every piece of evidence had to be validated and tied back to a logical chain of reasoning—exactly how real-world digital forensics and incident response (DFIR) investigations operate.

Huge thanks to TryHackMe for hosting these legacy Navy challenges. If you're looking to test your analytical patience, I highly recommend giving this one a go.

#CyberSecurity #TryHackMe #CCT2019 #BlueTeam #DigitalForensics #USNavy #Pentesting

The CCT2019 room on TryHackMe is widely considered one of the most grueling and technically demanding forensic challenges on the platform. Originally designed for the 2019 U.S. Navy Cyber Competition Team (CCT) Assessment, it tests the absolute limits of a researcher's packet analysis and reverse engineering skills. 🏗️ Challenge Structure

The room is not a standard "step-by-step" tutorial. It is a raw assessment consisting of legacy files from the Navy's 2019 competition.

PCAP Focus: The core of the challenge revolves around deeply nested traffic captures. Difficulty: Officially rated as Insane. cct2019 tryhackme

Time Estimate: Expect to spend significantly more than the suggested 180 minutes. 🛠️ Key Skills & Tools Required

To successfully navigate CCT2019, you need mastery over several specialized domains: 1. Advanced Traffic Analysis

Wireshark & Tshark: Basic filtering is not enough; you must be comfortable extracting data from non-standard protocols.

USB Forensic: One task involves analyzing USB traffic captures to reconstruct file exchanges. 2. File Carving & Recovery

Binwalk: Essential for finding hidden or compressed files inside the PCAPs.

Integrity is Key: If you fail to recover a file perfectly in step one, later stages become impossible. 3. Reverse Engineering

Binary Analysis: Later tasks require decompiling and reversing .NET applications.

Logic Puzzles: You will encounter mathematical constraints (like product/sum conditions) that require scripting solutions (e.g., Python) to solve. ⚠️ Common Pitfalls

Red Herrings: The creators intentionally included false leads. If you find yourself doing steganography (stego) early on, you are likely in a "rabbit hole".

Extraction Errors: Standard extraction tools sometimes corrupt the payloads. Using command-line tools like tshark is often the more reliable path. 💡 Final Verdict

CCT2019 is a "must-try" for aspiring Blue Teamers and forensic analysts who want to experience a high-stakes military-style assessment. It rewards persistence and "out of the box" thinking rather than encyclopedic knowledge of vulnerabilities. Recommended For: Advanced forensic students.

Professionals preparing for the GCFE or GCFA certifications. Anyone who enjoys complex, multi-layered puzzles. If you'd like to tackle this, Tips on reverse engineering .NET binaries using dnSpy. Help identifying red herrings in the initial PCAP. CCT2019 - TryHackMe The CCT2019 room on TryHackMe is a unique

is a high-difficulty, legacy Capture The Flag (CTF) challenge that originated from the US Navy Cyber Competition Team 2019

assessment. It is widely considered one of the platform's more "insane" rooms due to its broad technical scope and realistic, multi-layered problems. Quick Review Summary Difficulty:

. It is not intended for beginners and requires a high level of persistence. Time Commitment: The room has a suggested timeframe of 180 minutes

, though most users find it takes significantly longer to complete without hints. Skills Tested: It is an "all-rounder" challenge covering PCAP Analysis Reverse Engineering , Digital Forensics, and Cryptography. Key Highlights & Technical Depth Reviewers from platforms like highlight several specific aspects of the room's depth: Network Analysis: You are tasked with analyzing large

files to extract hidden data from specific traffic flows (e.g., port 4444) and decrypting them using tools like Steganography & Rabbit Holes:

The room is known for including intentional "rabbit holes"—complex-looking files (like certain images) that ultimately lead nowhere, testing your ability to prioritize leads. Reverse Engineering (RE): One of the most praised tasks involves reversing a .NET application using tools like to find specific slider combinations or hardcoded secrets. Analytical Depth: Unlike many CTFs that reward speed, CCT2019 rewards analytical depth

and attention to detail. It simulates the high-pressure environment of a professional military cyber assessment. Is it worth doing? For Professionals:

Yes. It provides a rare opportunity to tackle challenges sponsored by the US TENTH Fleet

, offering a glimpse into military-grade cyber competition standards. For Learning:

It is an excellent "capstone" for those who have finished the Offensive Pentesting Cyber Defense paths and want to test their limits. .NET Reverse Engineering CCT2019 - TryHackMe

The CCT2019 room on TryHackMe, designed for the U.S. Navy Cyber Competition Team, offers legacy challenges focusing on analytical depth, structured assessments, and validation of evidence. Key components include PCAP analysis, traffic reconstruction, reverse engineering, and layered forensics, emphasizing a zero-trust mindset. Learn more at TryHackMe. CCT2019 TryHackMe Challenge: Analytical Depth Over Speed

Directory brute-forcing (using gobuster or dirb):

gobuster dir -u http://<target_ip>:8080 -w /usr/share/wordlists/dirb/common.txt

Found directories:

6. Flags

3. Initial Exploit – File Upload

On port 8080, there’s often a file upload feature (e.g., profile picture upload).

nc -lvnp 4444

Trigger the shell and get a low-privilege shell (e.g., www-data).

Interesting Discovery:

Running sudo -l reveals that the chester user (or a similar low-priv user) can run a specific binary as root without a password:

User chester may run the following commands on cct2019:
    (ALL : ALL) NOPASSWD: /usr/bin/python3 /opt/backup.py

Step 1: Initial Reconnaissance – Scanning and Enumeration

Every great hack starts with reconnaissance. For this room, we begin with an nmap scan to identify open ports and running services.

CCT2019 – TryHackMe Write-up

Phase 3: Exploitation (Getting the Flag)

Based on the note, navigate to the hidden directory.

  1. Navigate: http://<MACHINE_IP>/secret/
  2. Result: You might see a message like "Secret Development Folder" or a directory listing.

The Twist: This room is slightly tricky. You won't find a flag immediately on the webpage. If you look deeper (or run another gobuster scan on this directory), you might find nothing. However, check the source code of the pages you visit.

Alternative Path (The common solution): In CCT2019, the "secret" directory often contains a file or leads to another clue. If you are stuck, try looking at the robots.txt file, or simply look closer at the files in the web root.

Wait, let's re-evaluate the common path for this specific room:

  1. Look at robots.txt (http://<MACHINE_IP>/robots.txt).
  2. It often disallows a directory, for example: /passwords/.
  3. Navigate to /passwords/.
  4. You will find a file (e.g., credentials.txt or similar).

Finding the Flag: Inside one of these directories (often /secret/ or linked from the notes), there is a file named flag.txt or similar, OR the flag is displayed directly on a webpage.

Actually, on CCT2019 specifically, the goal is often simpler than a full system breach for the main flag.

Solution Step:

  1. Access /secret/.
  2. Inside that folder, there is often a file called flag.txt.
  3. Open it.
  4. Flag Found.

(Note: There may be multiple flags or a user flag later, but the primary flag is often hidden in these web directories.) Found directories:

Title: Forensic Analysis of CCT2019 Capture the Flag Challenge – TryHackMe