Uriel Kosayev
Co-Founder & CPO at MalwareAnalysis.co
Tel-Aviv District, Israel
Summary
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Senior🎓
Top SchoolUriel Kosayev is a cybersecurity researcher, reverse engineer, and entrepreneur with eight years of hands-on experience dissecting malware, leading red teams, and advising enterprises on adversary-driven defense. As Co-Founder & CPO of RefineSec and founder of TrainSec Academy and MalwareAnalysis.co, he builds immersive, field-focused training and tooling that translate esoteric research into practical skills for security teams. He’s the author of MAoS – Malware Analysis on Steroids and Antivirus Bypass Techniques, resources known for real-world case studies and offensive-minded methodologies rather than academic abstractions. Uriel’s background in the IDF and roles across industry—from EPAM to AB InBev—reflect a mix of operational incident response, threat hunting, and productized training. He’s known for distilling low-level OS internals and evasion tactics into repeatable curricula that teach defenders to think like attackers. Based in Tel Aviv, he combines public speaking, enterprise consulting, and course design to raise the bar on malware analysis capability globally.
8 years of coding experience
8 years of employment as a software developer
ICT and Information Security Practical Engineer, ICT and Information Security Practical Engineer at Self TaughtSecurity Researcher & Investigator, Security Researcher & Investigator at IDF - Israel Defense Forces
Hebrew, English, RussianProgramming languages (1)
Github contributions (5)
MalFuzzer/Vulnerability-Research
Jan 2019 - Jan 2022
Contributions:47 commits, 49 pushes in 3 years
MalFuzzer/Code_for_Fun
Feb 2018 - Oct 2023
Contributions:85 pushes in 5 years 8 months
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