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Leszek Mis

Leszek Mis

CEO

Defensive-Security.com

About

Security Researcher/CEO at Defensive-Security.com, providing Open Source cybersecurity services including Red Team adversary emulations, Blue Team detection coverage testing, EDR effectiveness validation, Incident/DFIR support, advanced workshops, and high-quality knowledge transfer. Over 20 years of hands-on experience in Linux Red/Blue. My areas of interest include development of multi-stage attack paths mapping to MITRE ATT&CK,

multi-level detection paths known as detection engineering, Linux/network-related ML feature extraction, Linux internals with a focus on KS/eBPF rootkits, DE, log/memory analysis, threat hunting and exploration of new offensive techniques in Linux/Kubernetes in relation to

DFIR/detection/protection techniques.

Previous training experience:

● Hack In The Box [Amsterdam/Abu Dhabi/Singapore/Phuket] 2022/2023

● BruCON 2022

● 44CON UK 2022

● OrangeCON 2025

● x33fcon 2025 PL

● Black Hat USA 2019/2024

● Black Hat Asia 2025

● Many private training courses in the US, the EU, and Qatar

Leszek Mis | Out Of The Box - Jakarta