Writeups from Capture the Flag (CTF) events I participated in. About web, scripting, crypto, reversing and everything in between. All writeups include detailed explanations of how everything works.
Cyber Apocalypse 2023: The Cursed Mission by HackTheBox. A CTF full of unique and interesting challenges of the utmost quality
A beginner-friendly CTF organized by the Dutch TU Delft CTF team where anyone could participate, and me and some friends got 3rd place
An almost 3 week long CTF with beginner to hard challenges. Very high quality challenges with every week a new batch of challenges to try.
A Dutch CTF event with a Training Mission to practice, and a real CTF after. Part of the European Cyber Security Challenge. The challenges were all high quality and good learning material
A yearly Capture The Flag event that was a part of NahamCon. The event lasted 48 hours, and had loads of challenges from different categories.
A 5-day long CTF, with a challenge of every category coming out every day. Challenges range from beginner to medium.
A CTF hosted by Google, with some beginner/medium challenges
22 April is International Earth Day and guess what… The Earth was hacked by malicious extraterrestrials. Their ultimate plan is to seize control of our planet. It's only you who can save us from this terrible fate.
Miscellaneous one-off CTF writeups