HackTheBox You Cant C Me Writeup

Explore the basics of cybersecurity in the You Cant C Me Challenge on Hack The Box. This easy-level Challenge introduces encryption reversal and file handling concepts in a clear and accessible way, perfect for beginners.

https://app.hackthebox.com/challenges/209

Description

Can you see me?

Exploitation

#!/usr/bin/env python3

def get_flag():
    v4 = 0x5517696626265E6D
    v5 = b"o&kUZ'ZUYUc)"
    v4_bytes = v4.to_bytes(8, 'little')
    combined = v4_bytes + v5
    result = ''
    for i in range(20):
        result += chr((combined[i] + 10) & 0xFF)
    return f"HTB{{{result}}}"

if __name__ == "__main__":
    print(get_flag())

Summary

The You Cant C Me Challenge on Hack The Box is an easy-level reverse engineering puzzle that introduces participants to basic byte manipulation and data transformation techniques. The challenge involves decrypting a hidden flag by combining and processing predefined byte sequences using a simple arithmetic transformation. Participants write a Python script to merge a 64-bit integer and a byte string, apply a transformation to each byte, and reconstruct the flag. This challenge serves as an excellent introduction to reverse engineering and low-level data manipulation, making it ideal for beginners in cybersecurity.