Tryhackme: Cct2019

Here’s a structured write-up for the CCT2019 room on TryHackMe.
This room focuses on penetration testing skills, including web enumeration, privilege escalation, and exploiting misconfigurations.

Other useful features in CCT2019:

  • From Base64 / From Hex — common first steps
  • XOR Brute Force — for XOR-encoded data
  • ROT13 / ROT47
  • AES / DES Decrypt — when you have the key
  • Regular expression — extract specific patterns

If you meant a different feature or need help with a specific step in the room, let me know which task or encoded string you’re stuck on.

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.

  1. Network Exploitation Challenge: "Network Scanning"

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.

  1. 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.

  1. 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: cct2019 tryhackme

  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.

6. Third Flag – DNS Exfiltration

  • Filter DNS queries: dns.qry.name
    • Long subdomains (e.g., FLAG3....malicious.com).
  • Extract unique subdomains:
    tshark -r CCT2019.pcap -Y "dns.qry.type == 1" -T fields -e dns.qry.name | sort -u
  • Reassemble flag from subdomain parts.
    • Example: flag3dns_exfil_4ttack.

Environment & Tools

  • Target: CCT2019 TryHackMe machine (web service + additional exposed services).
  • Attacker host: Kali Linux (or equivalent).
  • Tools used: nmap, gobuster/dirbuster, nikto, wfuzz, curl, Burp Suite, sqlmap, hydra/Medusa (if brute force needed), linpeas/linenum, sudo -l, ssh, netcat, certutil/wget/curl for file transfer.

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.

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.

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

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 Here’s a structured write-up for the CCT2019 room

: 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

: 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

CTF2019: A Comprehensive Review of TryHackMe's Cyber Challenge

In the realm of cybersecurity, Capture The Flag (CTF) challenges have become an essential tool for both beginners and seasoned professionals to hone their skills and stay up-to-date with the latest threats and technologies. One such platform that has gained significant traction in recent years is TryHackMe, a virtual hacking lab that offers a range of challenges and scenarios to test one's mettle. In this article, we'll take a closer look at CCT2019, a TryHackMe challenge that simulates a real-world cyber attack, and explore its various aspects.

What is TryHackMe?

Before diving into CCT2019, let's briefly introduce TryHackMe. Founded in 2018, TryHackMe is a UK-based online platform that provides a virtual environment for learning and practicing cybersecurity skills. The platform offers a vast array of challenges, tutorials, and virtual machines (VMs) that mimic real-world scenarios, allowing users to develop their skills in a safe and controlled environment.

What is CCT2019?

CCT2019, short for "Cyber Challenge 2019," is a TryHackMe challenge designed to simulate a real-world cyber attack. The challenge is set in a fictional scenario where a large corporation, "Hawk Incorporated," has been compromised by an unknown threat actor. The goal is to infiltrate the corporation's network, escalate privileges, and ultimately capture sensitive data.

Challenge Overview

The CCT2019 challenge consists of several tasks, each representing a different stage of the attack. These tasks include:

  1. Initial Reconnaissance: Gathering information about the target network and identifying potential entry points.
  2. Initial Exploitation: Using vulnerabilities to gain initial access to the network.
  3. Privilege Escalation: Elevating privileges to gain deeper access to sensitive areas of the network.
  4. Lateral Movement: Moving laterally across the network to gather more information and gain access to additional systems.
  5. Data Exfiltration: Extracting sensitive data from the compromised systems.

Task 1: Initial Reconnaissance

The first task in the CCT2019 challenge involves gathering information about the target network. This includes performing a port scan, identifying open ports and services, and analyzing the network topology. TryHackMe provides a range of tools and resources to aid in this process, including a virtual machine (VM) with a Kali Linux image.

Task 2: Initial Exploitation

With the initial reconnaissance complete, the next task is to use vulnerabilities to gain initial access to the network. In this case, a vulnerable web application is identified, which can be exploited using a publicly available exploit. The goal is to gain a foothold on the network and establish a connection to the compromised system.

Task 3: Privilege Escalation

Once initial access has been gained, the next task is to escalate privileges to gain deeper access to sensitive areas of the network. This involves identifying vulnerabilities in the system, exploiting them to gain elevated privileges, and navigating to sensitive areas of the network.

Task 4: Lateral Movement

With elevated privileges, the next task is to move laterally across the network to gather more information and gain access to additional systems. This involves using various techniques, such as pass-the-hash attacks and exploiting vulnerabilities in network services.

Task 5: Data Exfiltration

The final task in the CCT2019 challenge involves extracting sensitive data from the compromised systems. This includes navigating to sensitive areas of the network, identifying sensitive data, and exfiltrating it using various techniques.

Conclusion

The CCT2019 challenge on TryHackMe provides a comprehensive and realistic simulation of a cyber attack. By completing the challenge, users can develop their skills in various areas of cybersecurity, including reconnaissance, exploitation, privilege escalation, lateral movement, and data exfiltration.

Benefits of TryHackMe's CCT2019 Challenge

So, what benefits does the CCT2019 challenge on TryHackMe offer? Here are a few:

  1. Improved Skills: The challenge helps users develop their skills in various areas of cybersecurity, making them more effective in real-world scenarios.
  2. Real-World Simulation: The challenge simulates a real-world cyber attack, providing users with a realistic and immersive experience.
  3. Hands-on Experience: The challenge provides hands-on experience with various tools and techniques, allowing users to practice what they learn.
  4. Community Support: TryHackMe has an active community of users and mentors who can provide support and guidance throughout the challenge.

Getting Started with TryHackMe's CCT2019 Challenge

If you're interested in taking on the CCT2019 challenge, here's how to get started:

  1. Sign up for TryHackMe: Create an account on TryHackMe's website.
  2. Access the Challenge: Navigate to the CCT2019 challenge page and start the challenge.
  3. Complete the Tasks: Complete each task in the challenge, using the resources and tools provided.
  4. Join the Community: Join the TryHackMe community to connect with other users and mentors.

In conclusion, the CCT2019 challenge on TryHackMe provides a comprehensive and realistic simulation of a cyber attack, allowing users to develop their skills in various areas of cybersecurity. With its hands-on approach, real-world simulation, and community support, TryHackMe's CCT2019 challenge is an excellent resource for anyone looking to improve their cybersecurity skills.

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.

Exploiting SSTI:

We can escalate the injection to read system files. A common payload:

 self.__class__.__mro__[2].__subclasses__()

From the list of subclasses, search for file or subprocess.Popen. With careful chaining, we achieve remote code execution.

First Flag (user.txt): After gaining a basic shell (e.g., via a reverse shell payload injected into the template), we navigate to /home/chester or /home/user to find user.txt.

Content of user.txt: A 32-character hash (typical for TryHackMe rooms). Other useful features in CCT2019:

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