Category: ECW
-
CTF/ECW/Cryptography AES NULL S-BOX Exploit (CryptoFlow)
For this third and final write-up of the CTF ECW 2023 edition, I will address the resolution of another challenge in the crypto category which has the originality of mixing pwn and cryptography, I named “CryptoFlow”. You can download the program here . Discovery of the challenge In this challenge we have access to a binary. We start…
-
CTF/ECW/Cryptography Breaking an OTP (BMPaaS)
For this second write-up on the CTF ECW 2023 edition, I address the resolution of a challenge in the crypto category “BMPaaS”, in which we will have to exploit an implementation of an OTP type algorithm (One-Time Pad ). Code analysis This is an OTP (One Time Pad ) type cryptographic algorithm, meaning that we have an…
-
CTF/ECW/Pwn Hacking Gameboy (Shellboy)
These last two weeks I had the opportunity to participate in the qualifying phase of the CTF ECW (for European Cyber Cup). In this first write-up I tackle the resolution of a pwn challenge which I found very nice and in which we will have to exploit a game on gameboy. You can download an archive…