CTFer | Researcher | DEFCON CTF 2019-2024 Finalist | Aleph Infinite Lead @ENKI_official_X Research Team Tweets are my own
Joined January 2021
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Played what's probably my last DEF CON CTF finals with 0x4b52.
Turns out it's 0.1% human intuition, 99.9% LLM response latency and temperature gacha.
Hyunsoo Cha retweeted
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CVE-2026-32223: heap overflow in usbprint.sys (IOCTL 0x220064).
Malformed USB descriptor, Named Pipe spray + Ghost Chunk for kernel leak, forged IRP, SYSTEM.
Writeup: enki.co.kr/en/media-center/b…
#CVE_2026_32223 #WindowsKernel #LPE #vulnresearch
Hyunsoo Cha retweeted
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. 🚀
Hyunsoo Cha retweeted
Our research team wrote an article with a detailed analysis of Safari RCE (CVE-2023-37450). Check it out! medium.com/@enki-techblog/io……
#safari #rce #cve202337450 #enki #whitehat
Hyunsoo Cha retweeted
Codegate CTF 2024 Preliminary will start soon!🚀🚀🚀
💰💰💰 Total Prizes (for Final) : 71M KRW (approx. $51k)
CTFTime: ctftime.org/event/2346
Duration: 2024.06.01 10:00 - 2024.06.01 10:00 (UTC+9)
Official Website: ctf.codegate.org
Discord: discord.gg/Ukakxb8Gn8
Hyunsoo Cha retweeted
We HypeBoy topped Plaid CTF 2024! 👑
@_Reinose_en @justlikebono @munsiwoo @real_as3617 @mhibio_ptw @howdays1 @stanzz @soo_sudo @n1net4il @1nteger_c @c2w2m2 @pr0cf51 @cmy981224 @csapp3e ironore15 G0RiYa
Thanks to the great support from dakuo & hellsonic
Hyunsoo Cha retweeted
데프콘 본선을 4위로 마무리했습니다.
14명의 한국인이 모여 만든 낭만은 내년에도 계속됩니다. 😆
HypeBoy got 4th place in #DEFCON 🥳
Keep your eyes on 14 koreans :)))
youtu.be/11cta61wi0g
2 years ago, a similar anti-cheating mechanism was applied in a domestic CTF. (of course, unlike codegate, there were many challenges for beginners and there were limit of team size (<=4)), and a total of 22 teams were caught cheating on 6 challenges. (obvious cheating)
However, unlike that case, what I was overlooked in this case is that it may not be "obvious cheating". It is certain that to be disqualified by the rules, but there may be a "victim" to it.
Codegate CTF 2023 Preliminary is coming. 🚀🚀🚀🚀🚀🚀
Here are the details:
Duration: 2023.06.17 10:00 - 2023.06.18 10:00 (UTC+9)
Official website: codegate2023.org/
Discord: discord.gg/8GdTSKshHm
FYI : The total prize money for the final round has been increased. totally 86 million KRW (approx. $65,000 worth)
Hyunsoo Cha retweeted
all team member:
@_Reinose_en @justlikebono @munsiwoo @real_as3617 @mhibio_ptw @howdays1 @haven4someone @stanzz @soo_sudo @n1net4il @1nteger_c @c2w2m2 ironore15 G0RiYa
only 14 korean teammates XD