Part of Windows operating system for over 20 years, DCOM (Distributed Component Object Model) has received a lot of attention from the security research community. Ranging from lateral movement and privilege escalation to persistence techniques, DCOM is an extremely versatile attack vector. Yet, its inner workings remains unknown to many security experts. To close this knowledge gap, we will take a deep dive into DCOM latest research works — including this year’s many new contributions— through practical use cases and tooling. A comprehensive testing framework will eventually be presented, enabling security researchers to build upon these previous works more effectively. At last, we will discuss practical defensive strategies, along with key insights to help security analysts effectively detect and respond to DCOM-based abuse.