Capture the Flag

The CTF runs alongside the main talks on June 4th at Kablys — see the full schedule.

The CTF is public — no conference ticket is required to participate. However, some tasks will only be available on-site during the conference day.

Format

Team-based, up to 3 persons per team.

Registration

Registration is available at ctf.bsidesvilnius.lt.

Register for CTF

CTFd Registration Instructions

  1. All participants must create an account on CTFd.
  2. One person from each team should act as the team captain. The captain must create the team in CTFd and invite the remaining team members through the CTFd invite system.
  3. Maximum 3 members per team are allowed.
  4. Team disbanding is disabled. If your team needs to be disbanded after it has been created, please contact the admins.
  5. When you register, you will not see any challenges yet.

CTF Timeline

  • Challenges open: 2026-05-31 12:00 Vilnius time
  • Challenges close: 2026-06-04 12:00 Vilnius time (on main event day)

Prizes

Prizes are sponsored by Surfshark

Surfshark logo

🥇 1st place — each team member receives:

  • Proxmark3 Easy
  • YubiKey 5 NFC
  • A special mega prize from the BSides Vilnius crew 🎁

🥈 2nd place — each team member receives:

  • LILYGO T-Echo LoRa

🥉 3rd place — each team member receives:

  • LaskaKit Arduino MAXI Starter Kit

Award Ceremony

The award ceremony will be held during the event day — see the schedule for the exact time. Top 3 teams, please make sure to be present so you can collect your prizes on stage!

Rules

  • Be respectful. Maintain a friendly, sportsmanlike atmosphere.
  • Don't enable cheating. Each challenge should be solved by the team and not shared with friends or other participants.
  • You're allowed to use any available resources during the competition.
  • Don't mess with the challenges. Participants should not take any actions which could impede other participants from solving any of the challenges.
  • Don't spoil it for others. Any write-ups or flags may be published only after the CTF is officially closed.
  • Tread with caution. Participants should be careful not to interfere with the operation of any systems which are not explicitly or logically indicated as being part of the challenge.