Author: Thom Holwerda
This is the second installment of the Defender’s Guide series. In keeping with the theme, we are discussing Windows Services, the underlying technology, common attack vectors, and methods of securing/monitoring them. Services are an important part of the Windows operating system, allowing the control and configuration of long-running processes essential to keeping the OS functional. This also allows services to be a common vector of escalation and persistence by attackers. Some services (especially custom services) run with high privilege levels, and are set to restart themselves on boot. This is a slam dunk for the enterprising attacker looking to gain a foothold in an environment. Everything you ever wanted to know about services in Windows, particularly as it relates to security.