sap_sensitive_tables_direct_access_by_rfc_logon_data_table

rule sap_sensitive_tables_direct_access_by_rfc_logon_data_table {

  meta:
    author = "Google Cloud Security"
    description = "Detects direct access to sensitive SAP tables (e.g., USR02, T000) specifically via RFC logon. This identifies potential data exfiltration or unauthorized inspection of security-critical data tables."
    severity = "High"
    tactic = "TA0009"
    technique = "T1005"

  events:
    $e.metadata.log_type = "SAP_SECURITY_AUDIT"
    $e.additional.fields["msg_1"] = "CUZ"
    $SID = $e.target.application
    $table = $e.additional.fields["param1_1"]

    $table in %sap_sensitive_tables.name

  match:
    $table over 1h

  outcome:
    $user_list = array_distinct($e.principal.user.userid)
    $source_ips = array_distinct($e.principal.ip)
    $system_ids = array_distinct($SID)
    $event_count = count($e.metadata.id)
    $terminal_names = array_distinct($e.principal.hostname)

  condition:
    $e
}