This room teaches the importance of Information Gathering. The exploit wasn't a complex software vulnerability (like a buffer overflow), but rather a vulnerability in the information management of the system administrator (leaving notes and sensitive directories accessible on the web server).
The CCT2019 TryHackMe room features legacy challenges from the 2019 US Navy Cyber Competition Team, focusing on forensics, cryptography, and reverse engineering, with key tasks involving Rail Fence ciphers and Run-Length Encoding. Detailed write-ups are available for specific challenges like the re3 reverse engineering task. Detailed walkthroughs can be found in the Medium articles by Emanuele Ciccolunghi, Mitun, and Nier0x00.
a collection of legacy challenges from the US Navy Cyber Competition Team 2019 Assessment . It is rated as
difficulty and covers various categories including Web, Reversing, Pwn, and Forensics.
Below is a breakdown of the primary challenges and methodologies for the room. Challenge: re3 (Reverse Engineering)
This challenge involves a .NET PE executable that requires a 32-character hex blob as the answer. Initial Analysis : Running the command identifies it as a 32-bit .NET assembly to decompile and analyze the source code. Methodology Focus on the module named , which contains the core logic.
Analyze the GUI components; the application features four sliders with values ranging from 0 to 1024.
Locate the verification function that checks if the slider positions match a specific hardcoded or calculated condition to generate the final hex string. General Room Strategy
Given the "insane" rating, many challenges in this room follow a theme of analytical depth over speed Web Exploitation : Common vulnerabilities in these challenges include SQL Injection CVE-2019-9053 ) or exploiting misconfigured services. Privilege Escalation
: Look for binary exploitation opportunities or common misconfigurations like LD_PRELOAD abuse or vulnerable Persistence
: Note that these are legacy challenges from the US Tenth Fleet; solutions often require understanding older software versions and specific environment quirks from that 2019 timeframe.
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
CCT2019 (short for CyberChess Tournament 2019) is a medium-difficulty room on TryHackMe created by a renowned community member. Unlike simple boot-to-root machines, this room simulates a realistic corporate environment with a twist—you are investigating an employee’s compromised machine to uncover evidence of a data breach.
Key Details:
The name "CCT2019" suggests a capture-the-flag competition held in 2019, and the room mirrors the intensity of a real CTF event. Let’s break down how to conquer it.
gobuster dir -u http://<target_ip>:8080 -w /usr/share/wordlists/dirb/common.txt
Found directories:
If you found this article helpful, you might also search for:
Happy Hacking, and remember: On TryHackMe, every new room is a step closer to mastery. The CCT2019 room is not just a challenge—it’s a lesson hidden inside a tournament.
The CCT2019 room on TryHackMe, originally built for the U.S. Navy Cyber Competition Team, offers a challenging, assessment-based environment that emphasizes deep forensic analysis and traffic reconstruction over speed-based hacking. The room tests intermediate to advanced skills, including PCAP analysis, reverse engineering, and cryptographic puzzles, designed to foster a zero-trust, analytical mindset. Learn more about this challenge at LinkedIn. CCT2019 TryHackMe Challenge: Analytical Depth Over Speed
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
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. cct2019 tryhackme
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
CTF 2019 TryHackMe: A Comprehensive Guide to Mastering Cybersecurity Challenges
The world of cybersecurity is constantly evolving, and one of the most effective ways to stay ahead of the curve is by participating in Capture The Flag (CTF) challenges. In 2019, TryHackMe, a popular online platform for cybersecurity challenges, hosted its CTF event, which attracted thousands of participants from around the globe. In this article, we'll provide an in-depth guide to CCT2019 TryHackMe, covering the challenges, solutions, and takeaways from the event.
What is TryHackMe?
TryHackMe is an online platform that provides a virtual environment for cybersecurity enthusiasts to practice their skills in a safe and legal manner. The platform offers a range of challenges, from beginner-friendly tasks to advanced scenarios, allowing participants to test their knowledge and learn new techniques. TryHackMe's CTF events are designed to simulate real-world cybersecurity scenarios, making them an excellent way to prepare for a career in cybersecurity.
CCT2019 TryHackMe: The Event
The CCT2019 TryHackMe event took place in 2019 and consisted of a series of challenges designed to test participants' skills in various areas of cybersecurity, including:
Challenges and Solutions
The CCT2019 TryHackMe event featured a range of challenges, each with its unique solution. Here are a few examples:
In this challenge, participants were provided with a web application that was vulnerable to SQL injection. The goal was to extract sensitive data from the database.
Solution: Participants used tools like Burp Suite and SQLmap to identify and exploit the SQL injection vulnerability.
In this challenge, participants were provided with a network diagram and tasked with identifying open ports and services.
Solution: Participants used tools like Nmap and Masscan to scan the network and identify open ports and services.
In this challenge, participants were provided with an encrypted message and tasked with decrypting it. This room teaches the importance of Information Gathering
Solution: Participants used tools like OpenSSL and cryptographic techniques like frequency analysis to decrypt the message.
In this challenge, participants were provided with a binary file and tasked with analyzing and exploiting its functionality.
Solution: Participants used tools like IDA Pro and Ghidra to analyze the binary code and identify vulnerabilities.
Takeaways and Lessons Learned
The CCT2019 TryHackMe event provided participants with a unique opportunity to learn and practice their cybersecurity skills. Here are some takeaways and lessons learned:
Conclusion
The CCT2019 TryHackMe event was a huge success, attracting thousands of participants and providing a platform for cybersecurity enthusiasts to learn and practice their skills. The event's challenges and solutions demonstrated the importance of staying up-to-date with the latest tools and techniques, critical thinking, and problem-solving in cybersecurity. As the cybersecurity landscape continues to evolve, events like CCT2019 TryHackMe will remain essential for anyone looking to pursue a career in this field.
Get Started with TryHackMe
If you're interested in trying out TryHackMe, you can sign up for a free account on their website. The platform offers a range of challenges and tutorials to help you get started, including:
By participating in TryHackMe's challenges and events, you can develop your cybersecurity skills, learn new techniques, and stay ahead of the curve in this rapidly evolving field.
cat /etc/crontab
Sometimes a script runs as root every few minutes.
If you want, I can produce:
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.
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 CCT2019 (short for CyberChess Tournament 2019 ) is
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 multi-task CTF designed for the U.S. Navy Cyber Competition Team 2019, focusing on networking, reverse engineering, forensics, and cryptography. 1. Task 1: pcap1 (PCAP Analysis) Goal: Analyze a network traffic capture file.
Approach: Use Wireshark or tcpdump to inspect the provided .pcap file.
Key Skills: Look for HTTP traffic, extracted files (File > Export Objects > HTTP), and cleartext credentials.
Tip: Focus on pcap-related skills and ensure you recover the first file in its entirety to avoid getting stuck on later steps. 2. Task 2: re3 (Reverse Engineering) Goal: Reverse-engineer a binary file to find a flag.
Approach: Use tools like file, strings, ltrace, strace, or disassemblers like Ghidra to analyze the provided binary.
Key Skills: Identifying main functions, analyzing function calls, and understanding how user input is processed. 3. Task 3: for1 (Forensics) Goal: Forensics investigation to find a hidden flag.
Approach: Use forensics tools like binwalk (for extracting files from within other files), stegseek or steghide (for steganography), or file signatures analysis.
Tip: If you are doing intense reverse engineering for a for-task, you might be in a rabbit hole; look for embedded files first. 4. Task 4: crypto1 (Cryptography) Goal: Decrypt a message to obtain the flag.
Approach: Identify the encryption type (e.g., XOR, Caesar, AES).
Key Tip: For this specific challenge, the key is the name of a keyboard layout. Enter the layout name three times (concatenated) in lowercase. General CCT2019 Strategy
Read Carefully: The prompt warns that red herrings are included, but you can stay on track by focusing on fundamental skills for each task type.
File Analysis: A major part of the challenge is recovering clues from provided files (pcap, binaries) to progress to the next step.
Tools: Be familiar with Wireshark, binwalk, strings, and Ghidra.
If you are stuck on a specific task, let me know which one (pcap1, re3, for1, or crypto1) and I can provide more specific steps. TryHackMe_and_HackTheBox/CCT2019.md at master - GitHub
Based on the title "cct2019" on TryHackMe, this refers to the Cyber Challenge Thailand 2019 (CCT2019) CTF challenges. On TryHackMe, this typically appears as a series of forensic challenges created by stuxnet.
Since this is a CTF (Capture The Flag) scenario rather than a linear narrative story, the "full story" is the walkthrough of how an investigator solves the case.
Here is the full story and solution walkthrough for the CCT2019 Forensics challenges on TryHackMe.