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pbctf2020 Hyper Bitstreams I write-up

2020-12-08
  • CTF

This challenge gives statically compiled x64 ELF binary which implements dynamic linking by itself. And there are a lot of anti reversing like self modifying, code obfuscation.

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pbctf2020 Corey's Coredump write-up

2020-12-07
  • CTF

This challenge gives ELF core dump and encryped flag. Challenge purpose is finding the flag decryption routine and gathering information from core dump.

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OS X에 burp suite 설치하기

2019-01-16
  • Web

맥에서 컴퓨터 패킷 잡기 위해서 burp suite를 깔아보았다.

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Addition and Subtraction over GF(2)

2018-09-03
  • Crypto

GF(2)에서의 뺄셈이 덧셈과 같은 이유를 알아보자.

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2018 RCTF Write-Up

2018-05-22
  • CTF

Participated as LeaveCat, Ranked 10th.
I solved 4 reverse challenge. (magic, simple-vm, simple-re, babyre2)

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