Martin Haller
Cybersecurity Researcher | Ethical Hacker | Microsoft MVP
Brno, Czechia
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Martin Haller is a cybersecurity researcher, ethical hacker, and Microsoft MVP. He co-founded PATRON-IT, a managed security service provider in the Czech Republic. His work combines security research, incident response, and practical experience protecting organizations.
His primary focus is Microsoft 365 and Entra ID security: uncovering overlooked permissions, identity misconfigurations, and attack paths that can compromise entire environments. He also researches the security of AI agents and the risks introduced by their access to tools, credentials, and corporate systems.
Martin is a defender at heart. He believes that studying attackers and understanding their tactics and techniques helps him build better defenses. His talks bring this perspective to life through practical demonstrations and lessons from real environments.
He holds OSCP, CHFI, ECSA, and MCSE certifications.
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Cyber Security 2026
AI ve firmách: tři bezpečnostní výzvy, které dnes vidíme v praxi [CZ]
HackerFest 2026
MCP: Model Context Problém [CZ]
Cyb3r Days 2026
AI agenti v YOLO módu: nová éra shadow IT [CZ]
TROOPERS26
RansomCloud: Ransomware Operations in Microsoft 365
Cyber Summit 2026
Incident Response v Microsoft 365 [CZ]
Venue: Hotel Sitno, Vyhne, Slovakia.
HackerFest 2025
RansomCloud: Když vás útočník vyhodí z tenantu [CZ]
Cyber Security 2025
101 odhalování kompromitovaných identit v Entra ID [CZ]
MindTheSec 2025
Entra ID’s Blind Spot: Real-world RBAC Misconfigurations
Cyb3r Days 2025
Entra ID: RBAC aneb ementál ve vašem tieringu [CZ]
TROOPERS25
RBAC: The Shady Place Behind Basic Entra ID Security
Disobey.fi
Gateway to Supply Chain Attacks on a Global Scale
Admin Days Global 2024
Microsoft Entra ID: Is It a Ticking Time Bomb? [EN]
Live-streamed studio talk on 22 October 2024. Listed in the official agenda as “Entra ID security - is it a ticking time bomb?”.
HackerFest 2024
Microsoft Entra ID: Šest stupňů odloučení [CZ]
Cyb3r Days 2024
Miskonfigurace aplikací v Entra ID [CZ]
TROOPERS24
Microsoft Entra ID: Overlooked Risks of Enterprise Applications [EN]
Introductory talk at the Microsoft Security roundtable, 28 June 2024. Listed in the official agenda as “Entra ID: Hidden Risks of Enterprise Applications”.
CyberCon 2022
Teorie vs. praxe – naše postřehy z auditů [CZ]
Talk on 14 September 2022. Listed in the official agenda as “Teorie vs. praxe, aneb naše postřehy z auditů”.
Martin Haller
Cybersecurity Researcher | Ethical Hacker | Microsoft MVP
Brno, Czechia
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