Hack.lu CTF 2025 is organized by FluxFingers, the capture-the-flag team of Ruhr University Bochum (Germany).
For announcements and questions, join us on Discord. This will be the main communication channel during the CTF alongside the announcements page.
Everyone may participate! You can play solo, but teaming up is more fun and a great way to learn from each other. Challenges range from beginner-friendly to truly formidable.
The CTF runs for 48 hours, just like in previous years. Keep an eye on the countdown so you're ready when things kick off.
Hack.lu CTF is a challenge-based Jeopardy event. Expect a mix of crypto, web security, reverse engineering, and binary exploitation tasks.
Binary Gecko GmbH provides tailor made cybersecurity solutions and services. Our international team is made up of world class, highly technical professionals with a proven track record in the field. We strive to tackle every problem with a holistic and in depth approach.
We're currently hiring and look for talented security researchers in the following areas:
If you are interested in working with us, please reach out to us at careers@binarygecko.com
Zellic is a security research firm. Our targets include compilers, virtual machines, web apps, circuits, proof systems, and more. Before Zellic, we previously founded perfect blue, the #1 CTF team in 2020 and 2021. If you're smart and good at CTFs, we'd love to meet you.
We offer a complete benefits package and direct equity participation. We also offer flexible hours, remote work, and both full-time and part-time roles. Our team enjoys regular fully-funded offsites and a range of other perks.
Ask your friends: you might already know someone who works here.
To learn more, check out our blog: https://zellic.io/auditooor-grindset
Work at Zellic: jobs@zellic.io | https://zellic.io/careers | @gf_256
Meet the founders:
Hetzner is one of the largest web hosts and data center operators in Europe, offering dedicated servers, cloud servers, web hosting, storage products, and much more.
