text code block:any where host.os.type == "linux" and process.interactive == true and container.id like "*" and ( (event.category == "file" and event.type == "change" and event.action == "open" and file.path like "/var/lib/kubelet/pki/*") or (event.category == "process" and event.type == "start" and event.action == "exec" and ( process.name in ("cat", "head", "tail", "more", "less", "sed", "awk") or process.args in ( "cat", "/bin/cat", "/usr/bin/cat", "/usr/local/bin/cat", "head", "/bin/head", "/usr/bin/head", "/usr/local/bin/head", "tail", "/bin/tail", "/usr/bin/tail", "/usr/local/bin/tail", "more", "/bin/more", "/usr/bin/more", "/usr/local/bin/more", "less", "/bin/less", "/usr/bin/less", "/usr/local/bin/less", "sed", "/bin/sed", "/usr/bin/sed", "/usr/local/bin/sed", "awk", "/bin/awk", "/usr/bin/awk", "/usr/local/bin/awk" ) ) and process.args like "*/var/lib/kubelet/pki/*") )
Install detection rules in Elastic Security
Detect Kubelet Certificate File Access 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).