Falco

Falco is a cloud-native runtime security tool originally created by Sysdig and now a CNCF graduated project. It monitors system calls in real-time using eBPF or a kernel module to detect abnormal behavior, intrusions, and data theft in containers, Kubernetes clusters, and Linux hosts. Falco ships with a comprehensive rule set covering the MITRE ATT&CK framework, detecting events like shell spawning in containers, unauthorized process execution, sensitive file access, network connections to suspicious destinations, and privilege escalation attempts. Rules are written in a human-readable YAML format and can be customized to match any organization's security requirements. Falco integrates with Kubernetes admission controllers to enforce security policies at deploy time, and its output can be routed to Slack, PagerDuty, SIEM systems, or any webhook endpoint for alerting.