Jeopardy Style Capture The Flag
Organized by Rehack & Heroes Cyber Security
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A Jeopardy-style Capture The Flag (CTF) is a cybersecurity competition format where participants solve independent technical challenges across multiple categories. Each challenge presents a specific security problem, and participants earn points by successfully solving the challenge and submitting the correct flag.
This format encourages analytical thinking, hands-on technical skills, and problem- solving under time constraints. Jeopardy CTFs are widely used in cybersecurity conferences and training environments as they are inclusive, scalable, and suitable for participants with varying levels of experience
Event Format: Onsite Jeopardy-style CTF competition
Date: 29th & 30th April
Location: Grand Hyatt, Jakarta
Participation format: Individual (solo) OR team of two (duo)
Registration: https://docs.google.com/forms/d/e/1FAIpQLSe0zsoNH3ARg8mJB4QBBc6ELX7thr7Pi-b0HjqAgws2zMOh7g/viewform
Challenges categories
The CTF will include challenges across multiple cybersecurity domains, including but not limited to:
• Digital Forensics
• Reverse Engineering
• Binary Exploitation (PWN)
• Web Application Security
• Additional categories such as Cryptography, or Miscellaneous challenges
Challenge Release and Validity
• Challenges released on Day 1 will expire at the end of Day 1
• Expired challenges will no longer be solvable after the first day
• A new set of challenges will be released on Day 2
This structure ensures fairness and prevents post-event or offsite solving.
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Rehack Consultancy / RE:UN10N CTF Team
Rehack Consultancy is a cybersecurity-focused consultancy and community-driven organisation that specialises in offensive security, penetration testing, and cybersecurity education. Rehack actively contributes to the regional security ecosystem through professional engagements, training programmes, and community initiatives that focus on developing practical and ethical cybersecurity skills.
In addition to consultancy services, Rehack has a strong track record in organising and supporting cybersecurity competitions, including onsite and online Capture The Flag (CTF) events. We generally will organise the event under the RE:UN10N CTF
team brand. These activities are designed to bridge the gap between theory and practice, making cybersecurity accessible to students while remaining relevant to industry professionals.
Official website: https://www.rehack.xyz/home/ and https://reun10n.team/
Heroes Cyber Security (HCS)
Heroes Cyber Security (HCS) is a cybersecurity team and community based in Jakarta, Indonesia, with a strong focus on competitive security and Capture The Flag (CTF) activities. HCS members actively participate in regional and international CTF
competitions and are recognised for their technical depth in challenge development and problem-solving across multiple security domains.
HCS brings significant experience in designing high-quality CTF challenges, managing competition infrastructure, and supporting participants during live events. Their involvement ensures technical robustness, fairness, and a high standard of competition throughout the event.
Official website: https://hcs-team.com/
Team
Muhammad Nabil Afrizal Rahmadani
Heroes Cyber Security Team
Nabil is an undergraduate at Institut Teknologi Sepuluh Nopember (ITS) and the President of Heroes Cyber Security. He works as a Penetration Tester at Protergo Cyber Security, with a primary focus on low-level exploit development and binary exploitation.
Jacinta Syilloam
Heroes Cyber Security Team
Jacinta is a final-year IT undergraduate and a Security Researcher Intern at the National University of Singapore (NUS). Her research focuses on LLM privacy and the use of CTF platforms for education, and she actively contributes as a CTF challenge creator in both local and international communities.
Achmad Zaenuri Dahlan Putra (ryuk)
Heroes Cyber Security Team
Specializing in reverse engineering, Ryuk is a Malware Researcher at Doctor Web, Ltd. with prior experience as a Red Team Consultant at Ensign InfoSecurity and Protergo Cyber Security. He is an active CTF competitor under the handle ryuk (kosong), earning recognition including Top Five in Flare-On 2025, 2nd Place at ICC 2024 (Team Asia), SAS CTF Final 2025, Securinets CTF Final 2025, 3rd Place at Black Hat MEA 2022, and numerous other podium finishes internationally.
Nik Amir (Whymir)
RE:UN10N Team
Whymir experienced in organizing CTFs in Malaysia such as RE:UN10N CTF, Badge to Breach ICS CTF 2025, Blackberry CTF 2025 and Girl in CTF 2025. Whymir also serves as a workshop trainer and lead organizer for Cyber Skills Level-Up! and Malaysia Cybersecurity Camp 2024 & 2025, while creating challenges in Miscellaneous and Web categories. Currently working as a penetration tester.
Adlina (Foxy)
RE:UN10N Team
Adlina has experience organizing CTFs, including RE:UN10N CTF, and serves as a workshop trainer and lead organizer for Cyber Skills Level-Up!. She is also a part of the administrator team for the RE:UN10N server and creates challenges in Miscellaneous and Forensics categories. Adlina is still a student.
Marcus (benkyou)
RE:UN10N Team
Active in Malaysian CTFs, including Girl in CTF and RE:UN10N CTF. Benkyou specializes in Web and Mobile challenge creation, serves as a workshop trainer for CSLU, and enjoys Boot2Root and Web security activities. Currently working as a penetration tester.
Zach Wong (zachwong_02)
RE:UN10N Team
Zach Wong is currently working as a Penetration Tester. Outside of his professional role, he actively explores areas like Red Teaming, Digital Forensics, Incident Response, and Malware Development and Analysis. He enjoys building lab environments to simulate cyber attacks and examining the digital evidence left behind. He also creates Capture The Flag challenges for multiple CTFs for universities, Malaysia Cybersecurity communities and also international CTFs, with a particular focus on Forensics.