picoCTF 2024 Writeup

Writeups for the picoCTF 2024.

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Let’s start with the challenges.

General Skills

Binary Search

We need to find the flag, There are 1000 possibilities but only 10 tries.

Everytime we enter a number it gives us a prompt wether the answer is higher or lower. We can divide the remainder in half to get to the desired number most efficiently.

Flag:

picoCTF{g00d_gu355_bee04a2a}

Time Machine

We were given a folder with a .git folder which has logs which basically serves the purpose of a time machine.

Flag:

picoCTF{t1m3m@ch1n3_d3161c0f}

Forensics

Web Exploitation

Cryptography

Reverse Engineering

Binary Exploitation