Shop is closed! We hope you had a lot of fun playing this year’s Hack.​lu CTF!

Congratulations to everybody who solved challenges and especially the winners:

🥳 Congrats to the winners! 🎉 💪
🥇 @kalmarunionendm.bsky.social
🥈 justCatTheFish
🥉 0rganizers
flu.xxx

Thanks for an awesome #Hackceler8, it was really fun this year!

It really came down to the wire at the end, hope to see you all again next year!

A shoutout to our sponsors whose support drives our meet-ups and participation in international competitions: Industriens Fond, JN Data, Dubex & ICSRange. And a huge thanks to The Tech Collective for hosting us at DEF CON 🙏

If you would like to support us, write to us at [email protected]!

🔜 What's next
- Google Hackceler8 Finals, Mexico - we're among the top 8 and can't wait to live-hack on stage.
- Copenhagen meetup - another big team session to keep the momentum rolling.

What makes this season special: our seasoned members are still all-in, and our younger talent is levelling up every single event. That blend of experience and growth is exactly what we hoped for when we started Kalmarunionen - upskilling ourselves while building a pipeline for others.

This is our fourth ASIS win, and it's a reminder that the top is never guaranteed. The field keeps getting sharper, and staying there takes a lot of grit.

It's been a minute since our last update. We played the @defcon.bsky.social CTF Finals in Las Vegas, with teammates on-site and a Danish venue.

🏆 We did it: @KalmarunionenDM just won ASIS CTF - our 4th ASIS WIN!

It came down to the wire. Other amazing teams like Maple Bacon, Shellphish, and especially BunkyoWesterns and r3kapig pushed us right to the last minute. That pressure is exactly why we are playing the hardest CTFs in the world.

Denmark’s Minister for Digitalisation, @carolinestage.bsky.social, stopped by mid-CTF to support us and talk cyber talent and the future of security. We hope you liked the hoodie! 😄

It’s been a wild first half of the season, and Kalmarunionen currently sits at #1 on the global CTF leaderboard!

🥈 2nd place at #GoogleCTF 2025!

Kalmarunionen fought hard all weekend and landed a strong second behind Friendly Maltese Citizens - who almost full-cleared the entire CTF. That was seriously impressive - see you at the Hackceler8 Finals in Mexico City later this year 🇲🇽

✨ Special shoutout 🙌 to our sponsors whose support makes these meetups and our CTF journey possible:
Industriens Fond, JN Data, Dubex, ICSRange

If you’d like to support Kalmarunionen, write to us at [email protected].

#kalmarunionen #ctf #hacking #cybersecurity #community

With the bigger CTFs postponed, we got an opportunity to slow down and dive deeper - sharing knowledge, solving problems together, and enjoying capturing flags. We play to win, but we also play because we love the challenge 💪🧠✨

Weekends like this are part of what makes Kalmarunionen special: a mix of collaboration, curiosity, and fighting spirit - and a chance for aspiring members to challenge themselves alongside some of the best CTF players in the world.

The result?
🥇 We full cleared and won all three CTF's - a triple win that kept the flag bell ringing non-stop all weekend!

A big thanks to Eupry for hosting us - we had a blast solving challenges together, sharing knowledge, and pushing each other to think deeper and faster.

While we were initially prepping for two bigger CTFs that unfortunately got postponed, we quickly adapted and dove headfirst into three other competitions instead:
🔹 Break the Syntax CTF
🔹 Dam CTF
🔹 San Diego CTF

🎯 Triple CTF Weekend in Copenhagen! 💥

This weekend, Kalmarunionen gathered physically for another meetup at Eupry in Copenhagen for an intense and fun-filled hacking meetup - joined by several of our teammates chiming in remotely! 🧠⚡

KalmarCTF 2025 is a wrap! Congrats to the winning teams!

🥇 - organizers
🥈 - Blue Water
🥉 - Tower of Hanoi
4️⃣ - r3kapig
5️⃣ - about:blankets
6️⃣ - The Flat Network Society

A big thanks to our sponsors hex-rays and Zellic! See you all next year! 🚩

With under 48 hours till we kick off with #KalmarCTF 2025, we are happy to announce that Zellic is joining as a sponsor this year, as well as an updated prize pool!
Come compete with the best competitive hackers from around the world!

Registrations are now open at kalmarc.tf !

#𝗞𝗮𝗹𝗺𝗮𝗿𝗖𝗧𝗙 𝟮𝟬𝟮𝟱 𝗶𝘀 𝗷𝘂𝘀𝘁 𝗮𝗿𝗼𝘂𝗻𝗱 𝘁𝗵𝗲 𝗰𝗼𝗿𝗻𝗲𝗿 - 𝗰𝗼𝗺𝗲 𝗰𝗼𝗺𝗽𝗲𝘁𝗲 𝘄𝗶𝘁𝗵 𝘁𝗵𝗲 𝗯𝗲𝘀𝘁 𝗰𝗼𝗺𝗽𝗲𝘁𝗶𝘁𝗶𝘃𝗲 𝗵𝗮𝗰𝗸𝗲𝗿𝘀 𝗳𝗿𝗼𝗺 𝗮𝗿𝗼𝘂𝗻𝗱 𝘁𝗵𝗲 𝘄𝗼𝗿𝗹𝗱 𝗮𝗻𝗱 𝘄𝗶𝗻 𝗴𝗿𝗲𝗮𝘁 𝗽𝗿𝗶𝘇𝗲𝘀! (6x IDAPro from @hex-rays.bsky.social) Mark your calendars for March 7th - 9th, 2025, and gear up for a 48-hour showdown of skill, and pure #CTF & #hacking grit.