Rintaro Koike / 小池倫太郎

Cyber Security Researcher

■ Links

Email
Twitter
- kkrnt
Mastodon
- kkrnt
Bluesky
- koike.me
GitHub
- koike
LinkedIn
- Rintaro Koike

■ Experiences

NTT Security (Japan) KK / NTT Security Holdings [Sep 2019 ~ Present]
- Threat Researcher
  - APT research targeting East Asia
- Security Analyst
  - Malware analysis
  - Network/EDR log analysis
NEC Corporation [Oct 2018 ~ Aug 2019]
- Security Engineer
  - Threat intelligence analysis
  - Product security incident response
  - Penetration testing

■ Talks

2025

JSAC 2025
- Behind the scenes of recent DarkPlum operations [Abstract]

2024

VB 2024
- P-wave of malicious code signing [Abstract] [Slide] [Paper]
- IcePeony with the ‘996’ work culture [Abstract] [Slide]
- Unmasking DarkPlum: inside the operations of DPRK’s elite cyber espionage group [Abstract]

2023

AVAR 2023
- Rebrand to X?: SteelClover Cornucopia [Abstract]
Hack.lu 2023
- The rise of malicious MSIX file [Abstract]
VB 2023
- FirePeony: A ghost wandering around the Royal Road [Abstract] [Slide]
SANS APAC DFIR Summit 2023
- The rise of malicious MSIX file [Abstract]
HITCON CMT 2023
- GroundPeony: Crawling with Malice [Abstract] [Slide]
JSAC 2023
- Detection engineering with Sigma: Defend against APT targeting Japan [Abstract] [Slide]

2022

Botconf 2021/2022
- Into The Silent Night [About] [Paper]
Japan Security Analyst Conference 2022
- An Order of Magnitude Update [Abstract] [Slide]

2021

CODE BLUE 2021
- Operation Software Concepts: A Beautiful Envelope for Wrapping Weapon [Abstract] [Slide]
VB 2021
- Where is the cuckoo egg? [Abstract] [Slide] [Paper]
Kaspersky Security Analyst Summit 2021
- Operation Software Concepts: A Beautiful Envelope for Wrapping Weapon [About]
Japan Security Analyst Conference 2021
- When you gaze into the Bottle,… [Abstract] [Slide]

2020

VB 2020
- Operation LagTime IT: colourful Panda footprint [Abstract] [Slide] [Paper]
- Unveiling the CryptoMimic [Abstract] [Slide] [Paper]
CPX 360 2020 (CPRCon 2020)
- An Overhead View of the Royal Road [Abstract] [Slide]
Japan Security Analyst Conference 2020
- An Overhead View of the Royal Road [Abstract] [Slide]

2019

AVAR 2019
- A Chronicle of Fallout [Abstract] [Slide]
AVTOKYO 2019 (Event)
- nao_sec tools [About]
VB 2019
- Finding drive-by rookies using an automated active observation platform [Abstract] [Slide]
HITCON CMT 2019
- Finding Treasures in the ToyBox [Abstract] [Slide]
Japan Security Analyst Conference 2019
- 週末なにしてますか? 忙しいですか? DbDを解析してもらっていいですか? [Abstract] [Slide]

2018

SECCON 2018 Conference
- 日本からExploit Kitはどのように見えるのか？ [Abstract]
BlackHat USA 2018 Arsenal
- EKTotal [Abstract] [Slide]
Japan Security Analyst Conference 2018
- Drive-by Download Must Die [Abstract] [Slide]

■ Awards

マルウェア対策研究人材育成ワークショップ MWS 2020 貢献賞 [About]
令和2年サイバーセキュリティに関する総務大臣奨励賞 [About]
2019年度 JNSA賞特別賞 [About]
マルウェア対策研究人材育成ワークショップ MWS Cup 2017 総合2位 [About]
コンピュータセキュリティシンポジウム 2017 CSS2017学生論文賞 [About] [Slide]
セキュリティキャンプ・アワード 2017 最優秀賞 [Slide]
マルウェア対策研究人材育成ワークショップ MWS Cup 2016 総合2位 [About]
マルウェア対策研究人材育成ワークショップ MWS Cup 2015 優勝 [About]

■ External Activities

nao_sec [Feb 2017 ~ Present]
- Founder & Chief Researcher
マルウェア対策研究人材育成ワークショップ MWS
- 実行委員 [2021]
- 企画委員 [2020]
- 問題作成支援員 [2019]
セキュリティ・キャンプ全国大会
- 講師 [2021]
- NOC ベテランOB [2018]
- NOC チューター [2017]
Japan Security Analyst Conference
- Review Board [2023 ~ 2025]

■ Blogs & White Papers