---
description: Pipeline for parsing Abuse.ch URL Threat Intel
processors:
  ####################
  # Event ECS fields #
  ####################
  - set:
      field: event.ingested
      value: "{{_ingest.timestamp}}"
  - set:
      field: event.kind
      value: enrichment
  - set:
      field: event.category
      value: threat
  - set:
      field: event.type
      value: indicator

  ######################
  # General ECS fields #
  ######################
  - rename:
      field: message
      target_field: event.original
      ignore_missing: true
  - json:
      field: event.original
      target_field: abusech.malware
  - fingerprint:
      fields:
        - abusech.malware.md5_hash
        - abusech.malware.sha256_hash
      target_field: "_id"

  #####################
  # Threat ECS Fields #
  #####################
  - set:
      field: threat.feed.name
      value: "[Filebeat] AbuseCH Malware"
  - set:
      field: threat.feed.dashboard_id
      value: "ad9c7430-72de-11eb-a3e3-b3cc7c78a70f"
  - date:
      field: abusech.malware.firstseen
      target_field: threat.indicator.first_seen
      formats:
        - "yyyy-MM-dd HH:mm:ss z"
        - "yyyy-MM-dd HH:mm:ss Z"
        - "yyyy-MM-dd HH:mm:ss"
      if: "ctx.abusech?.malware?.firstseen != null"
  - set:
      field: threat.indicator.type
      value: file
  - rename:
      field: abusech.malware.file_size
      target_field: threat.indicator.file.size
      ignore_missing: true
  - rename:
      field: abusech.malware.file_type
      target_field: threat.indicator.file.type
      ignore_missing: true
  # This includes a direct link to malicious files, we do not want them to appear in Kibana
  # in case they are accidently clicked.
  - remove:
      field: abusech.malware.urlhaus_download
      ignore_missing: true
  - convert:
      field: threat.indicator.file.size
      type: long
      ignore_missing: true
  - convert:
      field: abusech.malware.virustotal.percent
      type: float
      ignore_missing: true
  - rename:
      field: abusech.malware.md5_hash
      target_field: threat.indicator.file.hash.md5
      ignore_missing: true
  - rename:
      field: abusech.malware.sha256_hash
      target_field: threat.indicator.file.hash.sha256
      ignore_missing: true
  - rename:
      field: abusech.malware.imphash
      target_field: threat.indicator.file.pe.imphash
      ignore_missing: true
  - rename:
      field: abusech.malware.ssdeep
      target_field: threat.indicator.file.hash.ssdeep
      ignore_missing: true
  - rename:
      field: abusech.malware.tlsh
      target_field: threat.indicator.file.hash.tlsh
      ignore_missing: true
  - append:
      field: related.hash
      value: "{{{threat.indicator.file.hash.md5}}}"
      if: ctx?.threat?.indicator?.file?.hash?.md5 != null
  - append:
      field: related.hash
      value: "{{{threat.indicator.file.hash.sha256}}}"
      if: ctx?.threat?.indicator?.file?.hash?.sha256 != null
  - append:
      field: related.hash
      value: "{{{threat.indicator.file.hash.ssdeep}}}"
      if: ctx?.threat?.indicator?.file?.hash?.ssdeep != null
  - append:
      field: related.hash
      value: "{{{threat.indicator.file.pe.imphash}}}"
      if: ctx?.threat?.indicator?.file?.pe?.imphash != null
  - append:
      field: related.hash
      value: "{{{threat.indicator.file.hash.tlsh}}}"
      if: ctx?.threat?.indicator?.file?.hash?.tlsh != null

  ######################
  # Cleanup processors #
  ######################
  - set:
      field: threat.indicator.type
      value: unknown
      if: ctx?.threat?.indicator?.type == null
  - script:
      lang: painless
      if: ctx?.abusech != null
      source: |
        void handleMap(Map map) {
          for (def x : map.values()) {
            if (x instanceof Map) {
                handleMap(x);
            } else if (x instanceof List) {
                handleList(x);
            }
          }
        map.values().removeIf(v -> v == null);
        }
        void handleList(List list) {
          for (def x : list) {
              if (x instanceof Map) {
                  handleMap(x);
              } else if (x instanceof List) {
                  handleList(x);
              }
          }
        }
        handleMap(ctx);
  - remove:
      field: event.original
      if: "ctx?.tags == null || !(ctx.tags.contains('preserve_original_event'))"
      ignore_failure: true
      ignore_missing: true
  - remove:
      field:
        - abusech.malware.firstseen
        - message
      ignore_missing: true
on_failure:
  - set:
      field: error.message
      value: "{{ _ingest.on_failure_message }}"