Sharing writeups of CTF challenges and Machines
To solve this challenge, we need an understanding of references in headers. We will use this reference throughout the challenge. Q1. Only people who use the official PicoBrowser are allowed on this site! Change the user-agent to PicoBrowser. Q2. I don’t trust users visiting from another site. The Referer header allows a server to identify referring pages … Read More “picoCTF2021 – who are you? writeup” »
Description Figure out how they moved the flag. Solution Download the file. It is a packet file. Open it with wireshark. The log shows it’s looking for mac addresses. And tons of TFTP packets are following. I noticed some files are sent over the TFPT. Let’s check the files. Filter the packets with tftp.type Ok, … Read More “picoCTF2021 – Trivial Flag Transfer Protocol” »
Description Ron just found his own copy of advanced potion making, but its been corrupted by some kind of spell. Help him recover it! Solution Download the file and see the file content. As described, the file is corrupted so we don’t know the file type. In this case, we can check the file signature. … Read More “picoMINI – advanced-potion-making” »