Execution (TA0002)(external, opens in a new tab or window)
Defense Evasion (TA0005)(external, opens in a new tab or window)
text code block:any where event.category in ("file", "process") and event.type in ("change", "creation", "start") and ( process.name == "chmod" or ( /* account for tools that execute utilities as a subprocess, in this case the target utility name will appear as a process arg */ process.name in ("bash", "dash", "sh", "tcsh", "csh", "zsh", "ksh", "fish", "busybox") and process.args in ( "chmod", "/bin/chmod", "/usr/bin/chmod", "/usr/local/bin/chmod" ) and /* default exclusion list to not FP on default multi-process commands */ not process.args in ( "which", "/bin/which", "/usr/bin/which", "/usr/local/bin/which", "man", "/bin/man", "/usr/bin/man", "/usr/local/bin/man" ) ) ) and process.args in ("4755", "755", "777", "0777", "444", "+x", "a+x") and container.id like "?*" and not process.args == "-x"
Install detection rules in Elastic Security
Detect File Execution Permission Modification Detected via Defend for Containers in the Elastic Security detection engine by installing this rule into your Elastic Stack.
To setup this rule, check out the installation guide for Prebuilt Security Detection Rules(external, opens in a new tab or window).