Justin Bui
Senior Manager, Offensive Security at Snowflake
Los Angeles, California, United States
Summary
👤
Senior🎓
Top SchoolJustin Bui is a Senior Manager in Offensive Security with a decade of hands-on experience in red teaming, penetration testing, and post-exploitation across Windows, macOS, and Linux. He combines deep systems and embedded-systems knowledge from an M.S./B.S. in Electrical Engineering with practical exploit development and tooling expertise in languages like C/C++, Python, PowerShell, Swift, and Go. Justin has led offensive programs at Snowflake and Zoom and taught industry courses for SpecterOps, bringing both operator and instructor perspectives to assessments and detection engineering. He repeatedly automates repetitive tradecraft and builds custom payloads and frameworks to scale engagements and offensive CI/CD pipelines. A frequent conference speaker and contributor to public research (including work around Apple CVE-2022-42811), he’s equally comfortable mapping access token manipulation as he is building macOS post-exploitation tools. Based in Los Angeles, he blends curiosity about OS internals with a pragmatic focus on improving defensive posture through adversary simulation.
9 years of coding experience
7 years of employment as a software developer
Bachelor’s Degree, Electrical and Electronics Engineering, Bachelor’s Degree, Electrical and Electronics Engineering at University of California, Riverside
English, Vietnamese
Github Skills (66)
exe10
credentials10
factor-authentication10
spawn10
factor10
phishing10
infosec9
sarif9
mozilla-firefox9
authentication9
security9
bypass9
debug9
google-chrome9
artifacts8
Programming languages (8)
Github contributions (5)
slyd0g/PrimaryTokenTheft
Sep 2019 - Dec 2020
Steal a primary token and spawn cmd.exe using the stolen token
Contributions:21 commits, 21 pushes, 1 branch in 1 year 3 months
cmdtokenexestealspawn
slyd0g/LNKMod
Aug 2020 - Oct 2022
C# project to create or modify existing LNKs
Contributions:1 review, 3 commits, 1 PR in 2 years 2 months
sarifrefactormodifytoolkitbinaries
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