about

i'm gatekeeperr, a young security researcher into binary exploitation and malware analysis. this site collects my writeups on real-world bugs, ctf challenges and blog posts about pwn and malware.

latest

writeup · 2026-03-18 · 2 min read

Clutter-overflow - picoCTF (pwn, Medium)

picoCTF medium pwn challenge-stack buffer overflow to overwrite a local variable.

writeup · 2026-03-12 · 2 min read

Control Hijack - pwn.college (pwn, Hard)

pwn.college hard challenge - stack-based buffer overflow and control flow hijacking.