About me

Hello! I am k3ng, an Indonesian CTF player and cyber security graduate from the University of Queensland. I have participated in CTFs since 2022 and mainly play the Forensics category. I also create challenges from time to time.

This site hosts writeups from previous competitions and blog posts about things that interest me in cyber security, particularly forensics and threat hunting.

Experience

DownUnderCTF Organizer

Developed forensics challenges for DownUnderCTF since 2025.

CrikeyCon 11 CTF Crew · Mar 2026

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

BSides Brisbane CTF Challenge Author · Jul 2025

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

RECURSION 1.0 Problemsetter · Jul 2025

Developed two forensics challenges for the CTF competition.

Vice Person In Charge of CTF COMPFEST 16 · 2024

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 · 2023

Developed challenges for the competition’s qualification round.

Achievements

HackTheBox University CTF 2025 · 4th Place

Placed fourth globally and first 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 second place with the team “UQ ‘The Squad’ CyberSquad”.

CrikeyCon X CTF · 3rd Place · Mar 2025

Achieved third place with “AWAVAUATUSH”, consisting of UQ Cyber Squad members.

BackdoorCTF · Winner · Dec 2024

Won with “ADA INDONESIA COY”, a merger of top CTF players from Indonesia.

PwC Indonesia Hack A Day 2024 · 2nd Place · Nov 2024

Achieved first runner-up in Indonesia and fourth globally with “Sudah Adakah Yang Gantikank3ng”.

Cyber Jawara 2024 International · 2nd Place · Oct 2024

Achieved second place with “swusjask fans club”, a merger between four top Indonesian university teams.

CTF TCP1P International · Winner · Oct 2024

Won with “dimas fans club”, a merger between CSUI, HCS, CSI, and CCUG.

GEMASTIK 2024 Cyber Security · Finalist · Aug 2024

Reached the top 20 as “HengkerNgangNgong” and participated in the attack-defense finals at UNNES Semarang.

Technofair 11.0 CTF · 3rd Place · Jul 2024

Placed third out of ten finalist teams as “635 days since last finals”.

CTF COMPFEST 14 · Finalist · Sep 2022

Placed in the top 15 out of 117 teams as “HengkerNgangNgong”.