HackTheBox Canvas Writeup

Explore the basics of cybersecurity in the Canvas 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/156

Description

We want to update our website but we are unable to because the developer who coded this left today. Can you take a look?

Exploitation

Deobfuscated JavaScript

var res = String['\x66\x72\x6f\x6d\x43\x68\x61\x72\x43\x6f\x64\x65'](0x48, 0x54, 0x42, 0x7b, 0x57, 0x33, 0x4c, 0x63, 0x30, 0x6d, 0x33, 0x5f, 0x37, 0x30, 0x5f, 0x4a, 0x34, 0x56, 0x34, 0x35, 0x43, 0x52, 0x31, 0x70, 0x37, 0x5f, 0x64, 0x33, 0x30, 0x62, 0x46, 0x75, 0x35, 0x43, 0x34, 0x37, 0x31, 0x30, 0x4e, 0x7d, 0xa);

Open the browser console and type res.

Summary

The Canvas Challenge on Hack The Box is an easy-level challenge that helps beginners understand encryption reversal and file handling. By deobfuscating the provided JavaScript, the hidden flag can be revealed, providing insight into the basics of cryptography and reverse engineering in a simple context.