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Hello, I'm SeungHyun Kim.

Also known as sqrtrev

I am currently a undergraduate student at Korea University. My thesis studies are focused on Keras with a vision to use ML, neural-network with deep learning, to provide security in both system and web. If you want to request penetration test for your website, contact me.

Github / Twitter

E-mail(Korea University)

E-mail(Gmail)

Experience

CVE-2021-27550

  • with Dohyun-Lee from Merona Hunters

Founded Merona-Hunters

  • with SeungJun Kim, MinKi Jang, DoHyun Lee
  • Since 2021 ~

Founded Team Super Guesser

  • 2020 ~

QuasarZone Bug hunting

  • Got SQL Injection Vulnereability

ASIS CTF 2020

  • make a challenge: Admin Panel (32 solves)
  • make a challenge: Old School (16 solves)
  • make a challenge: PyCrypto (14 Solves)

Team WreckTheLine

  • 2020 ~

CVE-2020-23325

  • zero-day vulnerability on Wordpress Plugin

Korea University

  • Undergraduate Researcher

IJCTF 2020 (total 903 teams)

  • make a challenge: Broken_chrome (33 solves)
  • make a challenge: nod_nod (9 solves)
  • make a challenge: built_in_http (2 solves)

Belluminar

  • make a challenge: XSS? sqrt(NGA) CMS!

Team pwnsuky

  • 2019 ~ 2020

Project VoS: Twitch Voting Bot

  • Security and Backend develop. (PHP/Python)

Seil High School

  • Website SQL Injection and XSS bug hunt

Team HackCat

  • 2015 ~

Stack

Securinets CTF Quals 2021

  • Won 1st place as Super Guesser

LINE CTF 2021

  • Won 3rd place as rbtree fan club

UTCTF 2021

  • Won 3rd place as Super Guesser

zer0pts CTF 2021

  • Won 1st place as Super Guesser

darkCON CTF 2021

  • Won 2nd place as WreckTheLine

Real World CTF 3rd

  • 10th place as Super Guesser

TetCTF 2021

  • Won 2nd place as Super Guesser

DEFCON CTF 29

  • Qualified for Final

pbctf 2020

  • Won 2nd place as Super Guesser

HITCON CTF 2020

  • Won 1st place as Perfect ⚔️ Guesser

Dragon CTF 2020

  • Won 1st place as Perfect ⚔️ Guesser

BalsnCTF 2020

  • Won 1st place as Super⚔️Blue

KipodAfterFree CTF 2020

  • Won 1st place as Super Guesser

Hack.lu CTF 2020

  • 8th place as Super Guesser

N1CTF 2020

  • 4th place as Super Guesser

ISITDTU CTF 2020 Quals

  • 4th place as Super Guesser

Tasteless CTF 2020

  • Won 3rd place as Super Guesser

Evlz CTF 3.0

  • Won 2nd place as Super Guesser

FwordCTF 2020

  • 5th place as Super Guesser

Hackers Playground 2020(Samsung CTF)

  • Won 5th prize as WreckTheLine

Arab Security Cyber Wargames 2020 Qualification

  • 4th place as team sqrtnwarlock(2 man team)

PoseidonCTF 1st Edition

  • Won 1st prize as the3000

3kCTF 2020

  • Won 2nd prize as WreckTheLine

NahamCon CTF 2020

  • Won 2nd prize as WreckTheLine

Pwn2Win 2020

  • 7th Place as FireShell

CODEGATE 2020 Prequal

  • 2nd Place as USACykor

WhiteHat Grand Prix 06

  • 19th Place as pwnsuky

TokyoWesterns CTF 2019

  • 45th Place as pwnsuky

Holyshield 2019

  • 6th Place as pwnsuky

InCTF 2019

  • 6th Place as pwnsuky

RITSEC CTF 2019

  • 6th Place as pwnsuky

CTFZone 2019 Quals

  • 19th Place as Alephsuky

N1CTF 2019

  • 20th Place as pwnsuky

CODEGATE 2016

  • Finalist as CONFUS3R

WhiteHat Contest 2015 FINAL

  • 4th Place as HACKMAN

WhiteHat Contest 2015 Prequal

  • 3rd Place as team HACKMAN

CODEGATE 2015

  • Finalist as KH2RS

YISF2015

  • Awarded prize by Hauri as CONFUS3R

2014 Security Olympiad Prequal

  • 3rd Place as KH2RS

YISF2014

  • Awarded prize by Ahnlab as CONFUS3R
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