Container Residence Discovery Via Proc Virtual Filesystem

SigmaHQ Detections@sigmaHQ

•updated Aug 12, 2024•1•0•37

Detects potential container discovery by monitoring for common Linux utilities (awk, cat, grep, head, less, more, nl, tail) being used to read specific files within the '/proc' virtual filesystem. Specifically, it looks for access to '/proc/2/' (which would typically be kthreadd outside a container) or '/proc/cgroup' and '/proc/sched' which can reveal containerized environments due to differences in their content or PID mappings.