LoFP / there is a potential for false positives if direct kubernetes api requests 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.

process where host.os.type == "linux" and event.type == "start" and event.action == "exec" and (
  (
    process.name == "curl" and
    process.args in ("-H", "--header") and
    process.args like "*Authorization: Bearer *" and
    (
      /* CA-specified */
      process.args in ("--cacert", "--capath") or
      /* insecure */
      process.args in ("-k", "--insecure")
    )
  ) or
  (
    process.name == "wget" and
    process.args like "--header*" and
    process.args like "*Authorization: Bearer *" and
    (
      /* CA-specified */
      process.args == "--ca-certificate" or
      /* insecure */
      process.args == "--no-check-certificate"
    )
  ) 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 ("wget", "/bin/wget", "/usr/bin/wget", "/usr/local/bin/wget") and
    process.args like "--header*" and
    process.args like "*Authorization: Bearer*" and
    process.args == "--no-check-certificate"
  ) or
  (
    /* ssl_client is busybox-specific, so we need to handle it separately */
    process.name == "busybox" and
    process.args == "ssl_client" and
    process.args like "*Authorization: Bearer*"
  ) or
  (process.name == "openssl" and process.args == "s_client" and process.args == "-connect") or
  (process.name == "socat" and process.args like~ "*ssl*") or
  (process.name == "ncat" and process.args like "--ssl*") or
  (process.name == "kubectl" and process.args in ("get", "list", "watch", "create", "patch", "update"))
) and
container.id like "*"