Team Project Sekai organised a 48-hour CTF which took place online between 30.09 and 2.10 - this is a writeup of Symbolic Needs challenge (forensics category)
Cross-Site Request Forgery Cheat Sheet - attack vector, hints, tips, prevention, references
BugPoc together with @NahamSec launched a CTF sponsored by Amazon. AWS, crypto, obfuscation, path traversal - read how I combined them into a memory leak!
Between 5 and 12 April HackerOne organised a CTF together with AWS - and it was a brilliant experience! See how I solved this!