About Me

Hello! I am k3ng, an Indonesian CTF player and cyber-security student currently playing for UQ Cyber Squad. I have participated in CTFs since 2022 and mainly play the Forensics category. I also do create challenges from time to time.

This site hosts writeups from previous competitions and also blog posts about things that interests me in cyber-security (probably around topics such as forensics, threat hunting, etc.)

Experiences

  • DownUnderCTF Organizer

    Developed forensics challenges for DownUnderCTF since 2025.

  • CrikeyCon 11 CTF Crew

    Organised and developed 2 forensics challenges for the on-site CTF.

  • BSides Brisbane CTF Challenge Author

    Developed 2 forensics challenges for the on-site CTF competition.

  • RECURSION 1.0 Problemsetter

    Developed 2 forensics challenges for the CTF competition.

  • Vice Person In Charge of CTF COMPFEST 16

    Managed and organised one of the largest CTF competitions in Indonesia. Also curated and developed forensics challenges for the competition.

  • Scientific Committee of CTF COMPFEST 15

    Developed challenges for the competition's qualification round.

Achievements

  • HackTheBox University CTF 2025 4th Place

    Placed 4th place globally and 1st place in Indonesia with the team "CSUI".

  • ACUCyS Jingle Shells CTF 2025 Winner

    Won with the team "UQ Cyber Squad: A Christmas Miracle".

  • The Australian Cyber Security Games 2025 2nd Place

    Achieved 2nd place with the team "UQ "The Squad" CyberSquad".

  • CrikeyCon X CTF 3rd Place

    Achieved 3rd place with the team name "AWAVAUATUSH" consisting of UQ Cyber Squad members.

  • BackdoorCTF Winner

    Achieved 1st place on the capture-the-flag competition with "ADA INDONESIA COY", a merger of the top CTF players of Indonesia.

  • PwC Indonesia Hack A Day 2024 2nd Place

    Achieved 1st Runner Up in Indonesia and fourth globally with the team name "Sudah Adakah Yang Gantikank3ng".

  • Cyber Jawara 2024 International 2nd Place

    Achieved 2nd place with "swusjask fans club", a merger between 4 top university teams of Indonesia (Universitas Indonesia, Institut Teknologi Sepuluh Nopember, Institut Pertanian Bogor, Universitas Gunadarma).

  • CTF TCP1P International Winner

    Won with the team name of "dimas fans club", a merger between CSUI (Universitas Indonesia), HCS (Institut Teknologi Sepuluh Nopember), CSI (Institut Pertanian Bogor) and CCUG (Universitas Gunadarma).

  • GEMASTIK 2024 Keamanan Siber (Cyber Security) Finalist

    Reached Top 20, going by the name "HengkerNgangNgong" and participated in the Finals with the Attack-Defense format at UNNES Semarang.

  • Technofair 11.0 CTF 3rd Place

    3rd place out of 10 teams that participated in the finals, going by the name "635 days since last finals".

  • CTF COMPFEST 14 Finalist

    Top 15 out of 117 teams going by the team name "HengkerNgangNgong".