Various Vernacular - UTCTF 2021

We’re given the encrypted flag wmysau{foeim_Tfusoli} along with some additional encrypted text to help us ‘Hkgxologflutleiaymt xgf Azutgkrftmtf ltmntf ERW wfr ELW wfmtk Rkweq’. Some familiarity with common ciphers, along with the hint ‘This is a substitution cipher’, give us a pretty good direction to pursue so we decided to use this online tool for brute-forcing the solution. However, trying brute-forcing the text rendered nothing more decipherable than the initial text....

March 15, 2021 · javad

NeverLAN CTF 2020 Write-up

Browser Bias This challenge gives us very little information, just a url to a site that tells us Sorry, this site is only optimized for browsers that run on commodo 64. However, this also narrows our focus down to a singular goal - trying to convince the website that we are accessing it from a whatever a ‘commodo 64’ is. The first thing we need to know is how the browser can determine what type of client is making a request to it....

February 8, 2020 · javad