Rintaro Koike
Research Scientist at nao-sec
Greater Tokyo Area Japan
Summary
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SeniorRintaro Koike is a research scientist and security researcher with 12 years of experience specializing in APTs, web-based threats, malware analysis, SOC and NW/EDR log analysis, and custom signature development. Founder of nao_sec, he combines hands-on technical investigation with public-facing advocacy—regularly speaking at top industry conferences such as Virus Bulletin, Black Hat Arsenal, and FIRST. He serves on review boards, trains incident responders, and contributes to anti-malware engineering efforts, reflecting a commitment to both community capacity-building and operational excellence. Known for practical threat hunting and signature engineering, he brings deep experience turning telemetry into actionable detection and response. Based in the Greater Tokyo Area, he holds multiple professional coins/certifications including SANS SEC504 and FOR610, and is often tapped as an expert reviewer and conference committee member. An analyst at heart, he pairs meticulous reverse-engineering skills with a knack for communicating complex threats to diverse technical audiences.
12 years of coding experience
Github Skills (17)
signature9
malware9
blueteam9
exploit9
hash9
classification8
yara8
cybersecurity8
scanner8
infosec8
rtf7
threat-intelligence7
threat-hunting7
payload6
database5
Programming languages (4)
Github contributions (5)
nao-sec/ektotal
May 2018 - Sep 2021
[BHUSA 2018 Arsenal] Integrated tool to analyze Drive-by Download attack
Contributions:75 commits, 2 PRs, 66 pushes in 3 years 4 months
integratedinfosecarsenalcybersecurityattack
koike/public
Mar 2017 - Jul 2018
Contributions:16 commits, 15 pushes, 1 branch in 1 year 4 months
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