sap_sensitive_tables_direct_access_by_rfc_logon_static_list

rule sap_sensitive_tables_direct_access_by_rfc_logon_static_list {

  meta:
    author = "Google Cloud Security"
    description = "Detects direct access to highly sensitive SAP tables (USR02, PAYR, P0002) via RFC logon. This specifically monitors for potential theft of user hashes (USR02), payroll data (PAYR), or personal employee information (P0002)."
    severity = "High"
    tactic = "TA0009"
    technique = "T1005"
    log_source = "SAP_SECURITY_AUDIT"

  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 = /USR02|PAYR|P0002/

  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)
    $client_ids = array_distinct($e.target.resource.attribute.labels["slgmand_1"])

  condition:
    $e
}