CTF (en)

TsukuCTF 2022 Writeup

TsukuCTF 2022 Writeup

Himitsukichi CTF Forensic Oblivious

Writeup for Himitsukichi CTF

Notes Toward a Complete Understanding of Heap for Beginner CTF Players

Notes on learning about glibc's malloc function for CTF purposes.

SECCON Beginners 2022 Writeup

A writeup of the Rev challenges from SECCON Beginners 2022.

dvCTF2022 Writeup Mini Game(Rev)

DiceCTF 2022 Writeup - flagle (Rev)

Harekaze mini CTF 2021 Writeup

IMCTF 2021 Writeup

A writeup from IMCTF 2021 (Dec 18–19). We aimed for top 3 but finished 4th.

[CTF Beginner's Guide] Introduction to ELF Binary Reverse Engineering

MetaCTF 2021 Writeup

I took part in MetaCTF 2021, which ran from 12/4 to 12/5. This time I cleared all of the reversing challenges, so I'm writing up a few of the ones I found interesting.

Cyber Security Rumble CTF 2021 Writeup

A writeup from Cyber Security Rumble CTF 2021, held from November 26, 2021.

N1CTF 2021 Writeup

I participated in n1CTF, which ran from November 20, 2021. Unfortunately I could not solve any problems, but I am reviewing what I missed with the help of other writeups.