LoFP / there is a potential for false positives when the command line arguments looked for in this rule are used for legitimate purposes, such as debugging or troubleshooting. it is important to investigate any alerts generated by this rule to determine if they are indicative of malicious activity or part of legitimate container activity.

Techniques

• T1059
• T1613

Sample rules

Potential Kubeletctl Execution Detected via Defend for Containers

• source: elastic
• technicques:
  • T1059
  • T1613

Description

This rule detects the execution of kubeletctl inside a container. Kubeletctl is a command-line tool that can be used to interact with the Kubelet API directly. It allows easy access to this API, making the often undocumented Kubelet API more accessible. It is often used to enumerate the Kubelet API or other resources inside the container, and may indicate an attempt to move laterally within the pod.

Detection logic

process where host.os.type == "linux" and event.type == "start" and event.action == "exec" and (
  (process.name == "kubeletctl" or process.args like "*kubeletctl*") or
  (process.args in ("-s", "--server") and process.args in ("run", "portForward", "scan", "attach", "exec", "pods", "runningpods", "cri", "pid2pod"))
) and
process.interactive == true and container.id like "?*"