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Try to crack the 0xFEBC0DE CTF this weekend!

CTF Challenge 0xFEBC0DE runs at from February 25th, 2022, 4PM until February 27th, 2022, 8PM EEST UTC+2.

You have 2 hours to solve the challenges. You can choose a suitable time slot during the competition runtime.
No pre-registration needed.

Leaderboard is shown on CTF Tech Twitch Channel .
The winner of the challenge will be awarded with a prize by CTF Tech, which is BACKPACK.


  1. Participation
    1. Every player participates individually, and no pre-registration needed.
    2. Every player participates under their name using their user account at the CTF Tech Portal competition platform.
    3. Every player solves competition tasks on their own without using the help of other people. It is allowed to use instructions, guides, and manuals made by other people if these materials are not created specifically to solve tasks.
    4. There are no age restrictions to participate at the CTF competition.
  2. Tasks and scoring
    1. Competition is comprised of tasks that give points to players.
    2. Every task has a description and a question which specifies, what the player must enter as a solution (flag). This can be text, numbers, hash, sentences, or something else.
    3. Every task has a maximum point score that the player will receive after solving it successfully.
    4. Every task also contains hints. Hints have a price as a negative score, which will incur after opening the hint.
    5. After solving the task, the player will receive points which are calculated by taking the maximum points of the tasks and deducting the price of taken hints.
    6. If there are equal number of points, then overall time it took for every player to solve the challenges will be considered.
  3. Challenge round
    1. Competition is held from February 25th, 2022, 4PM until February 27th, 2022, 8PM.
    2. Every player can solve tasks during that time in a 2-hour window. That means when the player opens the platform and starts solving, they have up to 2 hours to complete all the tasks.
    3. Every player can open as many tasks as they want in any order. Abandoning tasks (closing a task without a solution) does not incur a penalty.
    4. Every player is allowed to solve the challenges only once.
  4. Gameplay limits
    1. It is strictly forbidden to perform any kind of Denial of Service or any other unwanted actions against the servers or associated infrastructure.
    2. Do not…
    3. …try to brute force the flag submission system.
    4. …perform any unwanted actions against other players.
    5. …try to exchange flags/write-ups/hints of the challenges during the competition with other players or to other external entities.
    6. …distribute the content of the CTF (the challenges) to third party entities for help.
    7. Any violation of these terms will automatically disqualify the player from the competition.

Good luck to all players and let's have fun!