Blog Index
- 2026-03-08 - A 29-Year-Old Bug in Quake II - Hunting a 64-bit Porting Issue in ref_soft
- 2026-03-08 - Fuzzing .NET Libraries with AFL++ and SharpFuzz
- 2025-12-14 - SECCON CTF 2025 Quals - Mini bloat
- 2025-11-30 - LakeCTF 2025 Quals - Another Android Applaketion writeup
- 2025-11-16 - HackingHub - Mother Printers writeup
- 2025-11-08 - N1CTF 2025 - Whimsical_Ideas_Happy_SShheeeepp writeup
- 2025-11-07 - N1CTF 2025 - n1vm writeup
- 2025-10-23 - CryptoCat - Ultimate Calculator 3000: Challenge Writeup & Analysis
- 2025-10-20 - Hack.lu CTF 2025 - Instructions unclear Writeup
- 2025-07-25 - Google CTF 2025 - cgb Writeup
- 2025-06-15 - bi0s CTF 2025 - Avernos Writeup
- 2025-05-26 - NahamCon CTF 2025 - Challenge Writeups & Analysis
- 2025-04-13 - 1753CTF - 🍀Luck, 🤷‍♂️ Free Flag and 🔮 Fortune
- 2024-11-28 - Scripting Ghidra - Create Data
- 2024-11-13 - Scripting Ghidra - Set Equate
- 2024-05-04 - Insomni’Hack 2024 Teaser - Trompe Loeil - Ready 2 Run
- 2023-01-27 - Insomni’Hack Teaser 2023
- 2022-11-29 - HITCON 2022 - Checker
- 2022-11-27 - HITCON 2022 - Meow Way
- 2022-11-13 - SECCON 2022 - eguite
- 2022-11-12 - Flare-on 2022 - in a tweet + images
- 2022-04-03 - The Gambler - Midnight Sun CTF 2022
- 2022-03-13 - Tinybit - 1337up CTF
- 2022-03-12 - Bitcoins for Flags
- 2022-01-30 - Insomni’Hack - Corona Virus
- 2021-11-25 - babyRust - N1CTF
- 2021-11-13 - Flare-On 8 - Antioch
- 2021-11-08 - Flare-On 8 - Flare VM
- 2021-11-02 - Flare-On 8 - known
- 2021-10-31 - Flare-On 8 - credchecker
- 2021-10-29 - Flare-On 8 - Beelogin
- 2021-10-29 - Flare-On 8 - Pet the Kitty
- 2021-05-17 - Don’t trust the decompilers
- 2021-04-25 - Solving Geanu
- 2021-04-24 - Debugging r2 - child processes
- 2021-04-22 - Debugging r2
- 2021-04-10 - Automating Ghidra - part 3
- 2021-03-19 - net user /times
- 2021-03-09 - Rusty - Technical background
- 2021-02-03 - Rusty
- 2020-08-31 - radare2 can do java
- 2020-08-06 - Ultimate list of resources for learning Reverse Engineering
- 2020-07-07 - Automating Ghidra - part 2
- 2020-06-09 - Making pwnlib.gdb.attach work under WSL2
- 2020-05-27 - Gynvael’s challenges - Solutions to collection of small web security challs
- 2020-05-08 - Automating ghidra
- 2020-04-28 - Solving Space Fights CTF
- 2020-04-19 - TAMUCtf - leaning tower
- 2020-03-13 - Debugging .Net applications without source code with dotPeek Symbol Server
- 2020-02-14 - Kaboom!
- 2020-01-16 - Core Dumb - HitCon 2019
- 2019-12-21 - Hitcon 2019 Qualification - EV3 Arm
- 2019-11-21 - Flare-On 2019 solutions/notes (upd. 11.02)
- 2019-06-20 - Solving SEGA Genesis ROM CTF Challenge
- 2019-04-08 - Oldschool - CONFidence Teaser 2019
- 2018-07-26 - Never ever be fooled to pay ransomware!
- 2018-07-05 - Handling self-modifying​ code with radare2
- 2018-05-19 - GynvaelEN - Mission 023 - Solution
- 2018-04-28 - Stop KrkAnalytica - solution
- 2018-04-10 - Gynvael - Mission 22 - Solution
- 2018-04-01 - GynvaelEN - Mission 022 - Solution
- 2018-03-30 - Gynvael - Mission 021 - Solution
- 2018-02-17 - Finding “Praktyczna Inżyniera Wsteczna” last hidden flag.
- 2017-12-19 - Assembly job offer… “Follow the white rabbit” solution
- 2017-12-06 - Gynvael - Mission 015 - Solution
- 2017-11-23 - GynvaelEN - Mission 19 - Solution
- 2017-11-14 - ECSM 2017 CTF
- 2017-11-10 - SecurityPWNing 2017 - p4 CTF
- 2017-10-15 - GynvaelEN - Mission 018 - Solution
- 2017-10-08 - Gynvael - Mission 012 - Solution
- 2017-10-08 - How do I approach this ctf debugging program - step by step
- 2017-10-05 - GynvaelEN - Mission 17 - Solution
- 2017-09-28 - GynvaelEN - Mission 16 - solution
- 2017-09-25 - Reverse engineering of Managed C++/C# CrackMe - solution
- 2017-09-21 - GynvaelEN - Mission 15 - Solution
- 2017-09-08 - Gynvael - Mission 010 - Solution
- 2017-08-14 - GynvaelEN - Mission 14 - Solution
- 2017-08-11 - GynvaelEN - Mission 13 - Solution
- 2017-08-05 - GynvaelEN - Mission 12 - Solution
- 2017-08-04 - GynvaelEN - Mission 11 - Solution
- 2017-06-24 - SHA2017 Teaser
- 2016-12-22 - I know I know nothing*
- 2016-12-11 - SECCON 2016
- 2016-11-28 - ECMS 2016 CTF
- 2016-11-27 - Security Pwning CTF by p4 - cont
- 2016-11-22 - Qiwi Infosec CTF & RC3 CTF
- 2016-11-14 - Security Pwning CTF by p4
- 2016-10-28 - EKOPARTY CTF
- 2016-10-22 - Hack.lu 2016
- 2016-10-11 - Hello HitCon 2016 CTF