Which runtime security monitoring tool is widely used in Kubernetes for detecting anomalous container activities?

• A. Falco
• B. KubeBench
• C. Kubernetes Dashboard
• D. KubeScanner

Answer: (A)

Runtime security monitoring in Kubernetes focuses on watching what running containers actually do and spotting abnormal behavior as it happens. Falco is built for this purpose: it continuously captures kernel events (like system calls, file access, network connections, and process activity) and applies a rules engine to flag suspicious actions in real time. This lets you detect things such as a container spawning a shell, unexpected file writes to sensitive locations, or unusual outbound connections, and trigger alerts or automated responses. It’s widely adopted in Kubernetes environments precisely because it provides actionable runtime visibility and alerting for anomalous container activity.

KubeBench is about validating cluster hardening against CIS benchmarks, not monitoring runtime behavior. Kubernetes Dashboard is a UI for cluster status and management, not an active anomaly detector. KubeScanner is a scanning tool focused on discovering vulnerabilities or misconfigurations, not real-time runtime analytics.