Through the organization of the annual Catch competition, we endorse the ideas of the Cyber Security Month in 2021, thus contributing to building a more secure Internet environment and cyberspace. The competition is organised by the CESNET Association.
Announcements (bugs, downtimes, etc.)
2021-11-08 12:40 - received write-ups were published on Write-ups page and the rewarded ones were mention on Awards page.
2021-11-01 13:30 - the main compettion is over, top 30 awareded players were published on Awards page. Do you have write-up of some challenges? Send it to thecatch@cesnet.cz, the best ones will be rewarded.
2021-10-22 10:00 - the speed premium (first blood award) winners has been published on Awards page
2021-10-19 10:00 - the smaller gifts will be awarded to first 30 (instead of 20) players.
Basic Information
The Catch is intended as an individual competition, but teamwork is not prohibited.
The registration into the CTF portal will be opened along with the start of the competition on Monday 11 October 2021 at 12:00 CEST.
The competition will be closed on Monday 1 November 2021 at 12:00 (CET)
The top 20 players will be invited to Award ceremony (can be changed to on-line ceremony if necessary).
Best contestants will receive valuable prizes. Other prizes (T-shirts, hoodies, small presents) will be awarded (see The Rewards)
Register yourself once the registration is open, i.e. create a player account in the CTF platform (nickname, e-mail and password need to be filled in).
Start solving the challenges:
Choose any of the challenges from the list. The challenges have some prerequisites, which has to be met before the challenge is accessible. Visible challenges can be solved in whatever order.
Read the challenge assignment carefully.
Download the file(s) for the analysis or visit the stated URL.
Perform the analysis (when correctly performed, you should be able to discover the flag in format FLAG{xxxx-xxxx-xxxx-xxxx} or flag{xxxx-xxxx-xxxx-xxxx}).
Insert the flag into the platform (to verify its correctness and acquire the points). The number of attempts is limited (the flag should be acquired by analysis not guessed).
