CTF Writeups
Interactive database of solved challenges across Reverse Engineering, Digital Forensics, and Binary Exploitation.
GEMASTIK XIX 2026 - CTF Penyisihan Official Writeup
Penyisihan GEMASTIK XIX 2026 writeup covering custom binary token decoding (common-encoding), discrete logs, memory triage, and bitmap reverse engineering.
HIB CHB Finals 2026 - Forensics & Reverse Engineering Writeup
Solutions for HIB CHB Finals 2026: Android storage forensic triage with OpenSSL AES-256-CBC and headless Python 3.11 bytecode repair and cracking.
HIB CHB Quals 2026 - AI, Forensics & Reverse Engineering Solutions
Detailed breakdown of HIB CHB Quals 2026 covering Keras bytecode deserialization, disk timeline triage with AES-256 decryption, and binary patching with anti-debugging bypass.
TECHFEST 2026 CTF Finals - VoltPN Android Malware Triage
Dissecting an Android malware dump, decompiling APK Smali bytecode to extract AES-CBC crypto keys, and carving device metadata to unlock exfiltrated credentials.
TECHFEST 2026 CTF Quals - Full Team Solutions
Walkthrough of TECHFEST 2026 Quals featuring DisplayPort raw signal packet carving (DpDp), custom cryptography vaults, and sandbox escapes.
Cyber Wave 2.0 CTF - Multi-Layer Crypto & Full Category Breakdown
Comprehensive solutions for Cyber Wave 2.0 CTF: Matryoshka nested multi-cipher breaking, binary analysis, covert network triage, and open-source intelligence operations.
Freepass POROS 2026 - Comprehensive All-Categories Solving Report
Master writeup covering all 7 categories from Freepass POROS 2026: Cloud AWS triage, advanced RSA cryptanalysis, memory packet triage, pwn, and reverse engineering.
Arkavidia 10.0 - NeuralCipher Walkthrough
Reversing a linear algebraic neural network cipher by computing matrix inversion modulo 256 using Gauss-Jordan elimination.
NCW BINUS 2025 - WASSUP TWIN Cryptanalysis
Breaking custom unpadded RSA with small twin prime modulus where message size exceeds modulus (m > N) via modular reduction recovery and prefix filtering.
CODEX CTF 2025 - Multi-Discipline Security Walkthrough
Solutions for CODEX CTF 2025: Hastad's broadcast attack with CRT (e=3), parallelized 24-bit keystream search, and dynamic core dump memory analysis.