APIFirstTimeAccess.yaml

id: c6258d51-7b82-4942-8293-94c1dcf91595
name: API - Rate limiting
description: |
  '42Crunch API protection against first-time access'
severity: Low
requiredDataConnectors:
  - connectorId: 42CrunchAPIProtection
    dataTypes:
      - apifirewall_log_1_CL
queryFrequency: 5m
queryPeriod: 5m
triggerOperator: gt
triggerThreshold: 0
eventGroupingSettings:
  aggregationKind: SingleAlert
status: Available
tactics:
  - Discovery
  - InitialAccess
relevantTechniques:
query: |
  let firstRec = apifirewall_log_1_CL
  | where TimeGenerated >= ago(5m) 
  | project-away Non_blocking_mode_b, Source_Port_d, Destination_Port_d, Query_s, API_ID_g, Request_Header_s, Response_Header_s, Errors_s, Type, UUID_g
  | where Instance_Name_s == "Instance_9" and URI_Path_s has "/api/login" |
  top 1 by Timestamp_t desc;
  let ipAddress = toscalar(firstRec | summarize by Source_IP_s);
  let secondRec = apifirewall_log_1_CL
  | where TimeGenerated >= ago(7d) 
  | project-away Non_blocking_mode_b, Source_Port_d, Destination_Port_d, Query_s, API_ID_g, Request_Header_s, Response_Header_s, Errors_s, Type, UUID_g
  | where Instance_Name_s == "Instance_9" and URI_Path_s has "/api/login" and Source_IP_s == ipAddress;
  let recCount = iff((toscalar(secondRec | count) > 1), 0, 1);
  secondRec | take recCount
customDetails:
entityMappings:
  - entityType: IP
    fieldMappings:
      - identifier: Address
        columnName: Source_IP_s
  - entityType: Host
    fieldMappings:
      - identifier: HostName
        columnName: Hostname_s
  - entityType: Account
    fieldMappings:
      - identifier: FullName
        columnName: Instance_Name_s
version: 1.0.0
kind: Scheduled