Suspicious Modification of Sensitive Linux System Files
Detects suspicious modifications to sensitive or critical system files on Linux systems. This rule monitors for common command-line utilities (like 'cat', 'echo', 'grep', 'vi', 'nano', 'sed') being used with output redirection ('>') or directly to edit files within critical system directories and configuration files. This activity could indicate an attacker attempting to alter system behavior, maintain persistence, or escalate privileges by modifying files that are not expected to change without explicit administrative planning.
Sigma
