---
description: Pipeline for normalizing Zeek signature.log.
processors:
  - set:
      field: event.ingested
      value: '{{_ingest.timestamp}}'
  - set:
      field: event.created
      value: '{{@timestamp}}'
  - date:
      field: zeek.signature.ts
      formats:
        - UNIX
        - ISO8601
  - remove:
      field: zeek.signature.ts
  # IP Geolocation Lookup
  - geoip:
      if: ctx.source?.geo == null
      field: source.ip
      target_field: source.geo
      ignore_missing: true
      properties:
        - city_name
        - continent_name
        - country_iso_code
        - country_name
        - location
        - region_iso_code
        - region_name
  - geoip:
      if: ctx.destination?.geo == null
      field: destination.ip
      target_field: destination.geo
      ignore_missing: true
      properties:
        - city_name
        - continent_name
        - country_iso_code
        - country_name
        - location
        - region_iso_code
        - region_name

  # IP Autonomous System (AS) Lookup
  - geoip:
      database_file: GeoLite2-ASN.mmdb
      field: source.ip
      target_field: source.as
      properties:
        - asn
        - organization_name
      ignore_missing: true
  - geoip:
      database_file: GeoLite2-ASN.mmdb
      field: destination.ip
      target_field: destination.as
      properties:
        - asn
        - organization_name
      ignore_missing: true
  - rename:
      field: source.as.asn
      target_field: source.as.number
      ignore_missing: true
  - rename:
      field: source.as.organization_name
      target_field: source.as.organization.name
      ignore_missing: true
  - rename:
      field: destination.as.asn
      target_field: destination.as.number
      ignore_missing: true
  - rename:
      field: destination.as.organization_name
      target_field: destination.as.organization.name
      ignore_missing: true
  - append:
      field: "related.ip"
      value: "{{source.ip}}"
      if: "ctx?.source?.ip != null"
  - append:
      field: "related.ip"
      value: "{{destination.ip}}"
      if: "ctx?.destination?.ip != null"

on_failure:
  - set:
      field: error.message
      value: "{{ _ingest.on_failure_message }}"
