Docker Container Discovery via .dockerenv File Access
This rule detects attempts to discover if a process is running inside a Docker container by listing or reading the '.dockerenv' file. Attackers often perform container discovery to understand their environment and plan subsequent actions. The rule specifically looks for common Linux utilities like 'cat', 'ls', 'find', 'dir', 'stat', 'test', or 'grep' being executed with '.dockerenv' in their command line arguments.
Sigma
