CyKor @CyKorKU

Korea’s #1-ranked hacker on HackerOne is back with a follow-up post! 👀 Hyunseo Shin (KU, 4th year) previously shared how he uncovered open-source 0-days using LLM agents. Now, he breaks down the AI-based vulnerability detection workflow behind those findings. Full post below 🔥 🔗 blog.cykor.kr/2026/06/Buildi… #CyKor #AI #hackerone

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We just posted a new article on our blog! 🚀 "How I Found Open-Source 0-days with an LLM Multi-Agent Workflow" 🔍 Hyunseo Shin (KU, 4th year) shares how an LLM-based multi-agent workflow uncovered real 0-days in open-source projects. Worth a read👇 🔗 blog.cykor.kr/2026/02/How-I-… #Cykor #LLM #ZeroDay

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We're excited to share our first post for 2026!: "[Paper Review] Factoring an integer with three oscillators and a qubit", written by Minjae Lee, who is a member of our club and 4th year at KU! blog.cykor.kr/2026/01/Paper-…

Congratulations!

CyKor CTF @cykorctf

6 months ago

Thank you everyone for taking part in CyKor CTF 2025! 🎉 We truly appreciate all the amazing teams who joined, battled hard, and made this year’s competition incredible. 💪💻 Here are the final results: 🥇 The Amazing Digital Orange! — 7585 🥈 r3kapig — 5489 🥉 ∴∎ — 5358

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CyKor CTF has been started! 👉 ctf.cykor.kr

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Attention, hackers 💥💥 CyKor CTF (@cykorctf) is just 2 days away — sign up now, we’re ready for you! 💪 Join and Play 👉 ctf.cykor.kr This time, we’re proud to introduce HSPACE as our Infra Sponsor! *HSPACE* is a *community of hackers* doing all kinds of exciting things. *Our cozy space is open 24/7 and completely free to use*, so feel free to stop by anytime. you'll love it. Address: 4F, 29 Teheran-ro 4-gil, Gangnam-gu, Seoul, 06240, Republic of Korea

Thrilled to have Zellic (@zellic_io) on board as a sponsor for CyKor CTF (@cykorctf)! Thanks for helping us make this year’s event bigger, better, and bolder. 💪✨ Zellic is a security research firm. We hire talented hackers to break critical software, ranging from virtual machines to compilers and major web apps to proof systems. Before Zellic, we founded perfect blue, the #1 CTF team in 2020 and 2021. We offer a comprehensive benefits package and direct equity participation, as well as flexible hours, remote work, and both full-time and part-time roles.

We’re proud to have ExpOnlyNoPoc (@exp_only_no_poc ) join us as a sponsor of CyKor CTF (@cykorctf)! We truly appreciate your partnership and support in empowering this year’s competition to reach new heights. 💪✨ We are not a company, just trying to trying to build a network of researchers especially in South Korea( or any other countries nearby! ) to perform collaborative, funny security vulnerability research without breaking your( and my ) NDAs! DMs via X(@exp_only_no_poc) if you have any vulnerability research projects to dig into together!

CyKor CTF is now registered on CTFTime! We invite everyone to join! ctftime.org/event/3028

We’re excited to welcome Enki Whitehat (@ENKI_official_X ) as a sponsor of CyKor CTF (@cykorctf)! we’re grateful for your partnership in taking this year’s competition to the next level. 🚀 ENKI Whitehat is a leading South Korean offensive security company specializing in pentesting, threat intelligence, and vulnerability research. Renowned for their technical excellence, they hold a staggering record of 24 CTF championships and over 100 disclosed vulnerabilities. Beyond services, they empower the industry through ‘OFFen’ (ASM/PTaaS) and their ‘CAMP’ training platform. Experience top-tier offensive security capabilities with ENKI Whitehat. 🚀

Dreamhack (@dreamhack_io) joins us as a proud sponsor of CyKor CTF (@cykorctf) ! Thank you for your generous support and partnership in making this year’s competition even more amazing. 💪 Dreamhack is South Korea’s largest cybersecurity and hacking learning platform. From LLMs to blockchain, you can build a strong foundation through more than 180 high-quality courses. Reinforce your learning with over 1,000 hands-on wargame challenges and grow alongside a vibrant community where users actively ask and answer questions. Start your journey toward becoming a true white-hat hacker with Dreamhack. 🚀 드림핵, 대한민국 최대 사이버 보안 해킹 학습 플랫폼. LLM부터 블록체인까지, 180개 이상 강의로 기초부터 탄탄하게. 1,000개 이상의 실습 문제(Wargame)로 배운 내용을 직접 체득하고, 유저끼리 상호 질의응답하는 해커 커뮤니티까지. 지금 드림핵에서 진짜 화이트햇 해커로 성장하는 여정을 시작하세요 🚀

@cykorctf All announcements, including the official scoreboard, will be posted on @cykorctf. We kindly invite you to follow the account for updates. The event will also be listed on CTFtime.org soon.

@cykorctf We are excited to announce that this year’s competition is supported by several WONDERFUL and distinguished sponsors. Their introductions will be shared in the coming days !

📢 CyKor CTF (@cykorctf) Announcement CyKor is pleased to host the upcoming CyKor CTF with great prizes! • 1st Place: $ 3,000 • 2nd Place: $ 1,500 • 3rd Place: $ 500 The event will be held for 24 hours, from 2025.12.06 01:00 (UTC+0) ! 🔗 CTF Link: ctf.cykor.kr

We're also preparing CyKor CTF for November with great sponsors and with awesome challenges 🔥🔥 We'll announce the CTF soon!

We just posted a new article on our blog! Jimin Jeong (KU, 4th year) got first blood in the Flag Checker (Rev) challenge from Crew CTF 2025 ! He wrote a full write-up on it — check it out 👇 blog.cykor.kr/2025/10/Crew-C… #CrewCTF #CyKor #CTF

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1. We’re actively looking for sponsors for CyKor CTF. If you’re interested, please reach out at [email protected] 🚀 2. We’d love to connect with hacking/security clubs from universities abroad! We’re also considering inviting each other to our universities!! Please DM!! 😁

We just posted a new article on our blog! 📝 "Secure Container Live Migration: A Lightweight Approach to Confidential VM Migration" 🛡️ Chungyhyun Kang (KU, 4th year) authored this piece — check it out for insights into confidential VM migration! 🔗 blog.cykor.kr/2025/08/Secure… #CyKor

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