Unknocking write-up (CyBRICS CTF 2019 Quals)
Unknocking was a networking task on CyBRICS CTF 2019 quals. The objective of the task was to reverse engineer a port knocking daemon that implements unconventional »
GoogleCTF 2019 GPhotos writeup
Challenge description The challenge is an image storage service implemented as a PHP script. The source can be retrieved via a hidden link on the main »
punchymclochface writeup (FAUST CTF 2019)
TL;DR This is a RCE-as-a-service that runs COBOL code encoded in punch card images upladed by user. Hard parts are generating valid punch card images »
refrain write-up (0CTF/TCTF Quals 2019)
refrain was a misc task at 0CTF/TCTF Quals 2019 where you had to reconstruct input data from a program trace. A single file was given: »