me.slime.kr Open in urlscan Pro
104.21.16.1  Public Scan

Form analysis
0 forms found in the DOM

Text Content

Gyuho Lee
Security Researcher • Frontend Developer
iidx   extr3.0@gmail.com   Gyuho Lee



ABOUT ME

Nick Name
» extr

Interested In
» Cyber Threat Intelligence
» Web Service Development
» Tea & Whisky

CTF & Research Groups

2019- HypwnLab, South Korea
» Nondisclosure 1-day & 0-day Research Group 2015-2017 DCUA, Multinational
» CTF Team (dcua & some Penthackon members) 2014-2015 Penthackon, Multinational
» CTF Team (Penthackon & some WOWHACKER members) 2013- WOWHACKER, South Korea
» Research Group 2012-2013 TeamTMP, South Korea
» CTF Team (4th & factorial) 2011-2012 4th, South Korea
» CTF Team


EXPERIENCE

Security Service Developer, NCSOFT
Gyeonggi, South Korea May 2021 - Present
-
» Developing In-house web service
» Developed of automation of operation tasks of security infrastructure and
heterogeneous security systems

DFIR Specialist, Plainbit Co., Ltd.
Gyeonggi, South Korea Aug 2019 - May 2021
1 year 10 months
» Supported DFIR(Digital forensics and incident response) service.
» Analyzed APT accidents and study countermeasures.

Senior Researcher, Culture Makers
Seoul, South Korea Nov 2018 - Jul 2019
8 months » Military Service (Skilled industrial Personnel)
» Operated infosec-related competitions and produced educational contents(also
infosec).
» Managed v-networks using virtualization products(vSphere) and developed
management tools related it.

Security Researcher, SEWorks Inc.
Seoul, South Korea / CA, United States Feb 2017 - Nov 2018
1 year 10 months » Military Service (Skilled industrial Personnel)
» Developed automation tools for products operation and management of backend
servers.
» Developed modules to analyze malicious APKs.

Software Vulnerability Analyst, WINS Co., LTD.
Gyeonggi, South Korea Jan 2016 - Jan 2017
1 year » Vulnerability research and 1-day vulnerabilities analysis on Microsoft
products.
» Developed malicious behavior analysis module included in APT attack detection
appliance.
» Reviewed appliance bug bounty reports.

Security Researcher, Divine Security
Iksan, Jeollabuk-do Jan 2015 - Jun 2015
6 months » Developed modules to analyze malicious APKs.

Security Consultant, *****
Seoul, South Korea Mar 2013 - Aug 2013
6 months » Black-box and white-box penetration testing for software and web
services.
» G-ISMS and ISMS security consult support for security companies.

--------------------------------------------------------------------------------


ACHIEVEMENT/AWARDS

Only showing the results of top 3 places and finalists of memorable CTFs,

International 2020 1st place, InterKosen CTF Japan 2020 1st place, Defenit CTF
South Korea 2019 1st place, Harekaze CTF Japan 2019 3rd place, DFRWS IoT
Forensic Challenge, write-up United States 2018 2nd place, Digital Forensic
Challenge 2018 South Korea 2017 2nd place, ASIS CTF Finals Iran 2017 3rd place,
Volga CTF Russia 2016 Finalist, TrendMicro CTF Japan 2016 2nd place, EKOPARTY
CTF 2016 Argentina 2016 1st place, ASIS CTF Finals Iran 2016 1st place, Volga
CTF Russia 2014 Finalist, DEFCON 22 CTF United States

Domestic 2022 Finalist, Cyber Conflict Exercise Daegu, South Korea 2019
Finalist, Cyber Conflict Exercise Busan, South Korea 2015 1st place, 14th HUST
Hacking Festival Seoul, South Korea 2015 1st place, Find the Digital Culprit
Seoul, South Korea 2015 1st place, Inc0gnito Hacking Competition Seoul, South
Korea 2014 3rd place, Find the Digital Culprit Seoul, South Korea 2013 3rd
place, Whitehat Contest Seoul, South Korea 2013 3rd place, Find the Digital
Culprit Seoul, South Korea 2011 Bronze Prize, Soonchunhyang University
'Y.I.S.F.' Asan, South Korea 2011 Bronze Prize, Tongmyong University
'Information Science Olympiad' Busan, South Korea

--------------------------------------------------------------------------------


PORTFOLIO

Software Vulnerability Reports

CVE-2022-41156 Remote Code Execution, Ondisk Player Agent CVE-2022-23766
Arbitrary File Execution, BigFile Agent CVE-2020-7881 Remote Code Execution,
AfreecaTV streamer service CVE-2019-12808 Local Privilege Escalation, ALTOOLS
update service RIDI Bug Bountry Remote Code Execution, Ridibooks Qt Viewer
KVE-2018-1470 Remote Code Execution, Infoleak NDA KVE-2018-0128 Remote Code
Execution, NDA KVE-2018-0058 Heap Buffer Overflow, NDA KVE-2017-0226 Remote Code
Execution, NDA KVE-2017-0129 Arbitrary File Read, NDA

CTF Organizer and Challenge Author

2021 Organizer and Challenge author, ACSC
» Challenge write-up: NYONG Coin & BitLocker Artifact 2021 Challenge author,
强网杯全国网络安全挑战赛
2020 Challenge author, PBCTF
» Challenge write-up: Vaccine Stealer 2020 Organizer and Challenge author, Bingo
CTF
» Challenge write-up: ISO & Disassembed 2018 Challenge author, Cyber Conflict
Exercise & Contest 2015-2016 Organizer and Challenge author, Christmas CTF 2015
Challenge author BoB CTF 2013-2016 Organizer and Challenge author, KAIST and
POSTECH Science War (Hacking) 2012-2013 Organizer and Challenge author, Hoseo
Information Security Challenge

Presentation

2019 Memory forensics using volatility, Supreme Prosecutors' Office
» SPO training course 2014 WOWHACKER OFFSET open hacking seminar - 1st.,
WOWHACKER
» Analyze and demonstrate ADD(Attention Deficit Disorder) technology of memory
anti-forensics.

Last updated at April 15th, 2021. Made with ♥. Created by help of Harold Kim.
HTML5/CSS3 verified.