sap_deactivation_of_security_audit_log

rule sap_deactivation_of_security_audit_log {
  meta:
    author = "Google Cloud Security"
    description = "Detects the deactivation of the SAP Security Audit Log (AUJ). This is a critical event as it stops further security logging."
    severity = "Critical"
    tactic = "TA0005"
    technique = "T1562"

  events:
    $e.metadata.log_type = "SAP_SECURITY_AUDIT"

    $e.additional.fields["msg_1"] = "AUJ"

    $e.additional.fields["param1_1"] = "0"

    $sid = $e.target.application
    $user = $e.principal.user.userid

  match:
    $sid over 1h

  outcome:
    $risk_score = 95
    $source_user = array_distinct($user)
    $terminal_ip = array_distinct($e.principal.ip)
    $target_sid = array_distinct($sid)
    $client = array_distinct($e.target.resource.attribute.labels["slgmand_1"])
    $instance = array_distinct($e.target.resource.name)
    $report_name = array_distinct($e.principal.process.file.names)
    $log_description = array_distinct($e.metadata.description)

  condition:
    $e
}