Dmitriy Beryoza

Senior Security Researcher

Dmitriy Beryoza is a Senior Security Researcher with Vectra, working on threat detection in the cloud and on-prem networks. Before that, he was a penetration tester and secure software development advocate at IBM. Before switching to security full-time, Dmitriy has been a software developer for many years. He spoke at DEF CON, BSides Las Vegas, BSides SF, Hackfest, and other security conferences. Dmitriy holds a Ph.D. in Computer Science and OSCP, CISSP, CCSP and CEH certifications. His interests include reverse engineering, secure software development, and CTF competitions.

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Dmitriy Beryoza

CSV Injection in Azure Logs

With the global migration to the cloud, enterprises had to rethink how they track malicious activity in their environments.

Challenges in Azure Log Monitoring: Insights for Your SOC

Vectra AI’s Security Research Team identified issues in Entra ID and Microsoft 365 logs that make your job harder — and may help attackers evade detection.

Tracking Passwordless Sign-in Failures in Azure

Recently, we investigated suspicious behavior in an environment where Azure passwordless authentication was set up. Prompting the investigations was several users were hit with unexpected Authenticator app prompts. To their credit, none of the users fell for the ruse or let the attacker in.