Cct2019 Tryhackme May 2026

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

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.

10. Conclusion

The CCT2019 room demonstrates how common protocols can be abused for covert data transfer. Analysts must inspect packet payloads, not just headers, and combine multiple forensic techniques.

Alternate Pathways and Lessons Learned

While the above walkthrough covers the standard SSTI → sudo exploit route, experienced users have found other vectors:

3. Identifying Anomalous Traffic

• Filter for ICMP: icmp
  • Payload lengths vary – many are 56 bytes (default) but some are longer (e.g., 512 bytes).
• Extract suspicious ICMP payloads:
  tshark -r CCT2019.pcap -Y "icmp.type == 8" -T fields -e data.data
• Decode hex to ASCII: Many strings start with FLAG: or base64‑like data.

Study & Practice Tips

• Recreate each step manually rather than relying on automated scripts—this builds intuition.
• Keep notes: commands used, files discovered, and credentials found.
• If stuck, search for specific error messages or service banners instead of brute-forcing.
• After finishing, repeat the room aiming for faster enumeration and cleaner documentation.

To write your full paper:

1. Run the room yourself on TryHackMe (requires subscription).
2. Replace the example flags with actual ones from the room.
3. Add screenshots of Wireshark filters, extracted data, and decoding steps.
4. Include code snippets for automation (Python, bash).
5. Reference official TryHackMe policies – do not publish direct answers/flags outside the platform.

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:

1. Web Exploitation: Challenges focused on web application security, including SQL injection, cross-site scripting (XSS), and file inclusion vulnerabilities.
2. Network Exploitation: Challenges focused on network security, including scanning, enumeration, and exploitation of network services.
3. Cryptography: Challenges focused on cryptographic techniques, including encryption, decryption, and cracking.
4. Reverse Engineering: Challenges focused on reverse engineering, including analyzing and exploiting binary code.

Challenges and Solutions

The CCT2019 TryHackMe event featured a range of challenges, each with its unique solution. Here are a few examples:

1. Web Exploitation Challenge: "Basic Web"

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.

2. Network Exploitation Challenge: "Network Scanning"

In this challenge, participants were provided with a network diagram and tasked with identifying open ports and services. cct2019 tryhackme

Solution: Participants used tools like Nmap and Masscan to scan the network and identify open ports and services.

3. Cryptography Challenge: "Encryption"

In this challenge, participants were provided with an encrypted message and tasked with decrypting it.

Solution: Participants used tools like OpenSSL and cryptographic techniques like frequency analysis to decrypt the message.

4. Reverse Engineering Challenge: "Binary Analysis"

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:

1. Practice makes perfect: The event highlighted the importance of practice in developing cybersecurity skills.
2. Stay up-to-date with the latest tools and techniques: The event showcased the latest tools and techniques used in cybersecurity, emphasizing the need for continuous learning and professional development.
3. Critical thinking and problem-solving are key: The event required participants to think critically and solve problems creatively, demonstrating the importance of these skills in cybersecurity.
4. Collaboration and community involvement: The event fostered a sense of community among participants, highlighting the value of collaboration and knowledge sharing in the cybersecurity field.

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:

1. TryHackMe's "Intro to Cybersecurity" tutorial: A beginner-friendly tutorial that covers the basics of cybersecurity and TryHackMe's platform.
2. TryHackMe's "CTF 101" challenge: A challenge that introduces participants to CTF-style challenges and cybersecurity concepts.

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.

TryHackMe CCT2019 Write-up

Introduction

In this write-up, we will walk through the steps taken to complete the CCT2019 challenge on TryHackMe, a popular online platform for learning and practicing cybersecurity skills. The CCT2019 challenge is designed to mimic a real-world Capture The Flag (CTF) competition, where participants have to exploit vulnerabilities in a provided virtual machine (VM) to gain access to sensitive information.

Initial Reconnaissance

Upon launching the CCT2019 VM on TryHackMe, the first step was to perform an initial scan of the machine to gather information about its configuration and potential vulnerabilities. This was achieved using the nmap command:

nmap -sV -p- <IP Address>

The scan revealed that the machine was running Windows 10 and had several open ports, including:

• Port 3389: Remote Desktop (RDP)
• Port 80: HTTP
• Port 445: SMB

Identifying Potential Vulnerabilities

The next step was to investigate the open ports and identify potential vulnerabilities. Port 80 (HTTP) was explored by accessing http://<IP Address> in a web browser. This revealed a login page for a custom web application.

Further investigation of the web application revealed a potential SQL injection vulnerability. However, before attempting to exploit this vulnerability, it was necessary to gather more information about the machine and its configuration.

Enumerating Users and Groups

Using the enum4linux tool, we enumerated users and groups on the machine:

enum4linux -a <IP Address>

This revealed a list of users, including:

• Administrator
• cct2019

It also revealed that the cct2019 user was a member of the Administrators group. is a high-difficulty, legacy Capture The Flag (CTF)

Exploiting the SQL Injection Vulnerability

The SQL injection vulnerability was exploited using Burp Suite, a web application security testing tool. A malicious SQL query was injected into the login form to extract sensitive information:

' OR 1=1 --

This query returned a list of users and their corresponding passwords. One of the users had a password that could be used for further exploitation.

Gaining Initial Access

Using the extracted credentials, we gained initial access to the machine via RDP:

xfreerdp /u cct2019 /p <password> /v <IP Address>

Once connected, we explored the machine and found a .txt file containing a cryptic message:

"cLzF"

Escalating Privileges

The .txt file hinted at a potential privilege escalation vulnerability. Further investigation revealed that the cct2019 user had the SeImpersonatePrivilege privilege enabled.

This privilege can be used to impersonate other users, including the SYSTEM user. Using the JuicyPotato tool, we exploited this vulnerability to gain SYSTEM-level access:

.\JuicyPotato.exe -l 1337 -p C:\Windows\System32\cmd.exe -a "/c net localgroup administrators cct2019 /add" -c all

Maintaining Access

With SYSTEM-level access, we created a new user account and added it to the Administrators group:

net user cct2019 <password> /add
net localgroup administrators cct2019 /add

This provided a persistent backdoor into the machine.

Conclusion

The CCT2019 challenge on TryHackMe was a comprehensive test of skills in vulnerability identification, exploitation, and privilege escalation. By following a systematic approach and using various tools and techniques, we were able to gain SYSTEM-level access and maintain a persistent backdoor into the machine.

The key takeaways from this challenge are:

• Initial reconnaissance is crucial in identifying potential vulnerabilities.
• SQL injection vulnerabilities can be exploited to extract sensitive information.
• Privilege escalation requires careful analysis of user privileges and vulnerabilities.
• Maintaining access requires creating a persistent backdoor.

By completing the CCT2019 challenge, we demonstrated our skills in conducting a comprehensive penetration test and exploiting vulnerabilities in a Windows 10 machine.

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

is a "Blue Team" oriented capture-the-flag (CTF) challenge originally from the US Navy Cyber Competition Team 2019 Assessment

The "Full Feature" portion of the challenge typically refers to a specific flag or task within the room. While there isn't a single "Full Feature" button that solves the room, the challenge is known for its high difficulty (rated as "Insane") and focus on pcap analysis Key Challenge Components Wireshark/tshark Analysis

: Most of the challenge involves deep packet inspection. You will often use tools like to extract specific fields from capture files, such as Out-of-the-Box Thinking

: Reviewers note that this room requires significant creative problem-solving rather than just following standard procedures. USB Data Extraction

: A common step involves extracting raw USB data payloads using commands like:

tshark -r pcap_file.pcapng -T fields -e usb.capdata > out.txt "Full Feature" Context

In CTF contexts similar to CCT2019, "Full Feature" often refers to: Flag Retrieval Alternate Pathways and Lessons Learned While the above

: The name of a flag hidden within a specific service or protocol. Service Identification

: Identifying a service that is running in a "full feature" mode (e.g., an FTP or SSH service with specific, non-standard configurations). InfoSec Write-ups Are you stuck on a specific packet capture particular task number within the CCT2019 room? AI responses may include mistakes. Learn more [ASMR] #TryHackMe - Challenge Forensic "CCT2019" part 1

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

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 "helpful feature" referenced in the CCT2019 TryHackMe challenge is a script found within one of the analysis tasks that automates the decryption of a Rail Fence Cipher.

In the context of the room's forensic and traffic analysis challenges, users typically encounter a Python script or function (often named railNumber or decrypt) designed to decode intercepted messages by calculating the correct rail position for each character in a ciphertext. Key Components of the Feature

railNumber Function: Automatically determines the rail index for a character based on its position, total rails, and a specific offset.

Modular Arithmetic: Uses mathematical logic to handle the "zigzag" nature of the Rail Fence Cipher, which is often difficult to decode manually.

Automated Decryption: Iterates through each rail to reconstruct the plaintext from what otherwise looks like randomized ciphertext.

This room is generally categorized as "Insane" difficulty due to its complex PCAP analysis and the requirement for "out of the box" thinking to identify these types of scripts and patterns within network traffic.

For a step-by-step walkthrough of the CCT2019 challenge and how these scripts are applied, you can watch this video: TryHackMe #702 CCT2019 (Insane) Adamski CTF YouTube• Apr 1, 2024 TryHackMe_and_HackTheBox/CCT2019.md at master - GitHub