Jinheon Lee

M.S.
Korea University B.E.

[Jinheon Lee @howdays1]

Our club will host the first-ever CyKor CTF !
We have prepared a set of high-quality challenges, please play our CTF! 🥹

[CyKor @CyKorKU]

📢 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: https://t.co/QPHKJyZ3u2

[CyKor @CyKorKU]

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!! 😁

[Jinheon Lee @howdays1]

@pr0cf51 Congratulations!

[Jinheon Lee @howdays1]

I've been ranked 2nd for two years 🥲

[c2w2m2 @c2w2m2]

Little late, but yea.
following last year's USACyKor, this year's CyGoN get second place in codegate 😀

[Jinheon Lee @howdays1]

I posted a DEFCON33 CTF challenge, jxl4fun2 (pwn).

[CyKor @CyKorKU]

We just shared two new DEFCON 33 CTF two write-ups on our blog!
🛠 Jinheon Lee (KU, 4th year) wrote about jxl4fun2 (pwn)
🧠 Jimin Jeong (KU, 4th year) covered tinii (rev)
Check them out:
🔗 https://t.co/XiVyrqprz1
🔗 https://t.co/Uw8iKsRUXW
#CTF #DEFCON #DEFCON33 #CyKor

[CyKor @CyKorKU]

We have recently launched a blog 🥳🥳

We're proud to share our very first post: "Write-up for AlpacaHack Round 9", written by @ah_p_uh, who is a member of our club!
https://t.co/Z8iDvYMAQT

Check it out and keep following our blog for more updates! 🚀

[SpaceX @SpaceX]

Mechazilla has caught the Super Heavy booster!

[Jinheon Lee @howdays1]

The last day of OffensiveCon 🍸🍷🍻

[Ian Beer @i41nbeer]

If you like memory corruption, low-level internals and building custom decompilers to analyse novel exploits check out the write-up here: https://t.co/LejBd5Di3S

[Jinheon Lee @howdays1]

I'm in HEXACON

[c2w2m2 @c2w2m2]

데프콘 본선을 4위로 마무리했습니다.
14명의 한국인이 모여 만든 낭만은 내년에도 계속됩니다. 😆

HypeBoy got 4th place in #DEFCON 🥳
Keep your eyes on 14 koreans :)))

https://t.co/pJa4cjGHHQ

[POC_Crew @POC_Crew]

[Zer0Con2023] "Gold Sponsor"

Thanks to PK Security(@pksecurity_io) for sponsoring the "Gold" 👊

PKSecurity is an offensive research company focusing on OS and Application vulnerability research.

#Zer0Con2023

[PKSecurity @pksecurity_io]

Pwn2own 2023 is coming in now. This pwn2own season remind us that we pwned microsoft teams (unfortunately we failed in real round). Here is our first blog post about our journey of pwn2own 2022 microsoft teams RCE.

https://t.co/FQ5682AUjL

[Jinheon Lee @howdays1]

@adm1nkyj1 Cool

[Jinheon Lee @howdays1]

StarBugs!

[Jinheon Lee @howdays1]

@vngkv123