description: Pipeline for parsing junipersrx firewall logs (flow pipeline)
processors:
#######################
## ECS Event Mapping ##
#######################
- set:
    field: event.kind
    value: event
- set:
    field: event.outcome
    value: success
    if: "ctx.juniper?.srx?.tag != null"
- append:
    field: event.category
    value: network
- convert:
    field: juniper.srx.application_risk
    type: float
    target_field: event.risk_score
    ignore_missing: true
    ignore_failure: true
- append:
    field: event.type
    value:
      - start
      - allowed
      - connection
    if: "ctx.juniper?.srx?.tag.endsWith('CREATE') || ctx.juniper?.srx?.tag.endsWith('UPDATE') || ctx.juniper?.srx?.tag.endsWith('CREATE_LS') || ctx.juniper?.srx?.tag.endsWith('UPDATE_LS')"
- append:
    field: event.type
    value:
      - end
      - allowed
      - connection
    if: "ctx.juniper?.srx?.tag.endsWith('CLOSE') || ctx.juniper?.srx?.tag.endsWith('CLOSE_LS')"
- append:
    field: event.type
    value:
      - denied
      - connection
    if: "ctx.juniper?.srx?.tag.endsWith('DENY') || ctx.juniper?.srx?.tag.endsWith('DENY_LS')"
- set:
    field: event.action
    value: flow_started
    if: "ctx.juniper?.srx?.tag.endsWith('CREATE') || ctx.juniper?.srx?.tag.endsWith('UPDATE') || ctx.juniper?.srx?.tag.endsWith('CREATE_LS') || ctx.juniper?.srx?.tag.endsWith('UPDATE_LS')"
- set:
    field: event.action
    value: flow_close
    if: "ctx.juniper?.srx?.tag.endsWith('CLOSE') || ctx.juniper?.srx?.tag.endsWith('CLOSE_LS')"
- set:
    field: event.action
    value: flow_deny
    if: "ctx.juniper?.srx?.tag.endsWith('DENY') || ctx.juniper?.srx?.tag.endsWith('DENY_LS')"

####################################
## ECS Server/Destination Mapping ##
####################################
- rename:
    field: juniper.srx.destination_address
    target_field: destination.ip
    ignore_missing: true
    if: "ctx.juniper?.srx?.destination_address != null"
- set:
    field: server.ip
    value: '{{destination.ip}}'
    if: "ctx.destination?.ip != null"
- rename:
    field: juniper.srx.nat_destination_address
    target_field: destination.nat.ip
    ignore_missing: true
    if: "ctx.juniper?.srx?.nat_destination_address != null"
- convert:
    field: juniper.srx.destination_port
    target_field: destination.port
    type: long
    ignore_failure: true
    ignore_missing: true
    if: "ctx.juniper?.srx?.destination_port != null"
- set:
    field: server.port
    value: '{{destination.port}}'
    if: "ctx?.destination?.port != null"
- convert:
    field: server.port
    target_field: server.port
    type: long
    ignore_failure: true
    ignore_missing: true
    if: "ctx.server?.port != null"
- convert:
    field: juniper.srx.nat_destination_port
    target_field: destination.nat.port
    type: long
    ignore_failure: true
    ignore_missing: true
    if: "ctx.juniper?.srx?.nat_destination_port != null"
- set:
    field: server.nat.port
    value: '{{destination.nat.port}}'
    if: "ctx.destination?.nat?.port != null"
- convert:
    field: server.nat.port
    target_field: server.nat.port
    type: long
    ignore_failure: true
    ignore_missing: true
    if: "ctx.server?.nat?.port != null"
- convert:
    field: juniper.srx.bytes_from_server
    target_field: destination.bytes
    type: long
    ignore_failure: true
    ignore_missing: true
    if: "ctx.juniper?.srx?.bytes_from_server != null"
- set:
    field: server.bytes
    value: '{{destination.bytes}}'
    if: "ctx.destination?.bytes != null"
- convert:
    field: server.bytes
    target_field: server.bytes
    type: long
    ignore_failure: true
    ignore_missing: true
    if: "ctx.server?.bytes != null"
- convert:
    field: juniper.srx.packets_from_server
    target_field: destination.packets
    type: long
    ignore_failure: true
    ignore_missing: true
    if: "ctx.juniper?.srx?.packets_from_server != null"
- set:
    field: server.packets
    value: '{{destination.packets}}'
    if: "ctx.destination?.packets != null"
- convert:
    field: server.packets
    target_field: server.packets
    type: long
    ignore_failure: true
    ignore_missing: true
    if: "ctx.server?.packets != null"

###############################
## ECS Client/Source Mapping ##
###############################
- rename:
    field: juniper.srx.source_address
    target_field: source.ip
    ignore_missing: true
    if: "ctx.juniper?.srx?.source_address != null"
- set:
    field: client.ip
    value: '{{source.ip}}'
    if: "ctx.source?.ip != null"
- rename:
    field: juniper.srx.nat_source_address
    target_field: source.nat.ip
    ignore_missing: true
    if: "ctx.juniper?.srx?.nat_source_address != null"
- rename:
    field: juniper.srx.sourceip
    target_field: source.ip
    ignore_missing: true
    if: "ctx.juniper?.srx?.sourceip != null"
- convert:
    field: juniper.srx.source_port
    target_field: source.port
    type: long
    ignore_failure: true
    ignore_missing: true
    if: "ctx.juniper?.srx?.source_port != null"
- set:
    field: client.port
    value: '{{source.port}}'
    if: "ctx.source?.port != null"
- convert:
    field: client.port
    target_field: client.port
    type: long
    ignore_failure: true
    ignore_missing: true
    if: "ctx.client?.port != null"
- convert:
    field: juniper.srx.nat_source_port
    target_field: source.nat.port
    type: long
    ignore_failure: true
    ignore_missing: true
    if: "ctx.juniper?.srx?.nat_source_port != null"
- set:
    field: client.nat.port
    value: '{{source.nat.port}}'
    if: "ctx.source?.nat?.port != null"
- convert:
    field: client.nat.port
    target_field: client.nat.port
    type: long
    ignore_failure: true
    ignore_missing: true
    if: "ctx.client?.nat?.port != null"
- convert:
    field: juniper.srx.bytes_from_client
    target_field: source.bytes
    type: long
    ignore_failure: true
    ignore_missing: true
    if: "ctx.juniper?.srx?.bytes_from_client != null"
- set:
    field: client.bytes
    value: '{{source.bytes}}'
    if: "ctx.source?.bytes != null"
- convert:
    field: client.bytes
    target_field: client.bytes
    type: long
    ignore_failure: true
    ignore_missing: true
    if: "ctx.client?.bytes != null"
- convert:
    field: juniper.srx.packets_from_client
    target_field: source.packets
    type: long
    ignore_failure: true
    ignore_missing: true
    if: "ctx.juniper?.srx?.packets_from_client != null"
- set:
    field: client.packets
    value: '{{source.packets}}'
    if: "ctx.source?.packets != null"
- convert:
    field: client.packets
    target_field: client.packets
    type: long
    ignore_failure: true
    ignore_missing: true
    if: "ctx.client?.packets != null"
- rename:
    field: juniper.srx.username
    target_field: source.user.name
    ignore_missing: true
    if: "ctx.juniper?.srx?.username != null"

######################
## ECS Rule Mapping ##
######################
- rename:
    field: juniper.srx.policy_name
    target_field: rule.name
    ignore_missing: true
    if: "ctx.juniper?.srx?.policy_name != null"

#############################
## ECS Network/Geo Mapping ##
#############################
- rename:
    field: juniper.srx.protocol_id
    target_field: network.iana_number
    ignore_missing: true
    if: "ctx.juniper?.srx?.protocol_id != null"
- geoip:
    field: source.ip
    target_field: source.geo
    ignore_missing: true
    if: "ctx.source?.geo == null"
- geoip:
    field: destination.ip
    target_field: destination.geo
    ignore_missing: true
    if: "ctx.destination?.geo == null"
- 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
- geoip:
    field: source.nat.ip
    target_field: source.geo
    ignore_missing: true
    if: "ctx.source?.geo == null"
- geoip:
    field: destination.nat.ip
    target_field: destination.geo
    ignore_missing: true
    if: "ctx.destination?.geo == null"
- geoip:
    database_file: GeoLite2-ASN.mmdb
    field: source.nat.ip
    target_field: source.as
    properties:
    - asn
    - organization_name
    ignore_missing: true
    if: "ctx.source?.as == null"
- geoip:
    database_file: GeoLite2-ASN.mmdb
    field: destination.nat.ip
    target_field: destination.as
    properties:
    - asn
    - organization_name
    ignore_missing: true
    if: "ctx.destination?.as == null"
- 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
- script:
    lang: painless
    source: "ctx.network.bytes = ctx.source.bytes + ctx.destination.bytes"
    if: "ctx?.source?.bytes != null && ctx?.destination?.bytes != null"
    ignore_failure: true
- script:
    lang: painless
    source: "ctx.network.packets = ctx.client.packets + ctx.server.packets"
    if: "ctx?.client?.packets != null && ctx?.server?.packets != null"
    ignore_failure: true

#############
## Cleanup ##
#############
- remove:
    field:
    - juniper.srx.application_risk
    - juniper.srx.destination_port
    - juniper.srx.nat_destination_port
    - juniper.srx.bytes_from_client
    - juniper.srx.packets_from_client
    - juniper.srx.source_port
    - juniper.srx.nat_source_port
    - juniper.srx.bytes_from_server
    - juniper.srx.packets_from_server
    ignore_missing: true

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