XCTF Misc Challenge Writeups - Part 1

base64÷4: 1. Download the attachment, which is a .txt file. Open it to find a string of characters: 666C61677B45333342374644384133423834314341393639394544444241323442363041417D 2. Upon observation, the string consists of only numbers and uppercase letters. Considering the challenge name, it's likely base16 (hexadecimal) encoded. Decoding it yi ...

Posted on Fri, 16 Oct 2026 16:19:23 +0000 by ed209