DE.CM-09 involves monitoring hardware, software, runtime environments, and associated data to detect adverse events like malware, phishing, or tampering. This includes tracking authentication attempts, configuration changes, and endpoint health to identify risks such as unauthorized software or credential attacks. It ensures a deep, system-level view of potential threats.

This subcategory enhances security by using endpoint technologies to redirect compromised devices for remediation, aligning monitoring with risk priorities. It provides comprehensive coverage of common attack vectors like email or file sharing, enabling rapid response. DE.CM-09 underpins a robust detection framework across the technology stack.