Collecter des journaux Google Cloud IDS

Ce document explique comment collecter les journaux de l'IDS Google Cloud en activant l'ingestion de la télémétrie Google Cloud dans Google Security Operations. Il explique également comment les champs de journal de l'IDS Google Cloud sont mappés sur les champs du modèle de données unifié (UDM) de Google Security Operations.

Pour en savoir plus, consultez Ingestion de données dans Google Security Operations.

Un déploiement typique se compose de journaux Google Cloud IDS activés pour l'ingestion dans Google Security Operations. Chaque déploiement client peut différer de cette représentation et être plus complexe.

Le déploiement contient les composants suivants :

• Google Cloud: services et produits Google Cloud à partir desquels vous collectez des journaux.

• Journaux Google Cloud IDS: journaux Google Cloud IDS qui sont l'ingestion dans Google Security Operations est activée.

• Google Security Operations: Google Security Operations conserve et analyse les journaux de Google Cloud IDS.

Un libellé d'ingestion identifie l'analyseur qui normalise les données de journal brutes au format UDM structuré. Les informations contenues dans ce document s'appliquent à l'analyseur avec l'étiquette d'ingestion GCP_IDS.

Avant de commencer

• Assurez-vous que tous les systèmes de l'architecture de déploiement sont configurés dans le fuseau horaire UTC.

Configurer Google Cloud pour ingérer les journaux Google Cloud IDS

Pour insérer les journaux de l'IDS Google Cloud dans Google Security Operations, suivez les étapes décrites sur la page Ingérer des journaux Google Cloud dans Google Security Operations.

Si vous rencontrez des problèmes lors de l'ingestion de journaux Google Cloud IDS, contactez l'assistance Google Security Operations.

Documentation de référence sur le mappage de champs

Documentation de référence sur le mappage de champs: GCP_IDS

Le tableau suivant répertorie les champs de journal du type de journal GCP_IDS et les champs UDM correspondants.

Obsolète:

Les champs labels suivants pour les noms UDM sont obsolètes : about.labels, intermediary.labels, observer.labels, principal.labels, src.labels, security_result.about.labels et target.labels. Pour les analyseurs existants, en plus de ces champs UDM, les champs de journaux sont également mappés avec les champs UDM de clé-valeur additional.fields. Pour les nouveaux analyseurs, les paramètres de clé/valeur des champs UDM additional.fields sont utilisés à la place des champs UDM labels obsolètes. Nous vous recommandons de mettre à jour les règles existantes pour utiliser les paramètres clé/valeur dans les champs UDM additional.fields au lieu des champs UDM labels obsolètes.

Log field	UDM mapping	Logic
insertId	metadata.product_log_id
jsonPayload.alert_severity	security_result.severity
jsonPayload.alert_time	metadata.event_timestamp
jsonPayload.application	principal.application	If the jsonPayload.direction log field value is equal to server-to-client, then the jsonPayload.application log field is mapped to the principal.application UDM field.
jsonPayload.application	target.application	If the jsonPayload.direction log field value is equal to client-to-server or the logName log field value matches the regular expression pattern traffic, then the jsonPayload.application log field is mapped to the target.application UDM field.
jsonPayload.category	security_result.category_details
jsonPayload.cves	extensions.vulns.vulnerabilities.cve_id	If the jsonPayload.cves log field value is not empty, then the jsonPayload.cves log field is mapped to the extensions.vulns.vulnerabilities.cve_id UDM field.
jsonPayload.destination_ip_address	target.ip
jsonPayload.destination_port	target.port
jsonPayload.details	extensions.vulns.vulnerabilities.description	If the jsonPayload.cves log field value is not empty, then the jsonPayload.details log field is mapped to the extensions.vulns.vulnerabilities.description UDM field.
jsonPayload.direction	network.direction	If the jsonPayload.direction log field value is equal to client-to-server, then the network.direction UDM field is set to OUTBOUND. Else, if the jsonPayload.direction log field value is equal to server-to-client, then the network.direction UDM field is set to INBOUND.
jsonPayload.elapsed_time	network.session_duration.seconds
jsonPayload.ip_protocol	network.ip_protocol	If the jsonPayload.ip_protocol log field value contains one of the following values, then the network.ip_protocol UDM field is set to ICMP. 1 ICMP ICMPV6 58 1.0 58.0 Else, if the jsonPayload.ip_protocol log field value contains one of the following values, then the network.ip_protocol UDM field is set to IGMP. 2 IGMP 2.0 Else, if the jsonPayload.ip_protocol log field value contains one of the following values, then the network.ip_protocol UDM field is set to TCP. 6 TCP 6.0 Else, if the jsonPayload.ip_protocol log field value contains one of the following values, then the network.ip_protocol UDM field is set to UDP. 17 UDP 17.0 Else, if the jsonPayload.ip_protocol log field value contains one of the following values, then the network.ip_protocol UDM field is set to IP6IN4. 41 IP6IN4 41.0 Else, if the jsonPayload.ip_protocol log field value contains one of the following values, then the network.ip_protocol UDM field is set to GRE. 47 GRE 47.0 Else, if the jsonPayload.ip_protocol log field value contains one of the following values, then the network.ip_protocol UDM field is set to ESP. 50 ESP 50.0 Else, if the jsonPayload.ip_protocol log field value contains one of the following values, then the network.ip_protocol UDM field is set to EIGRP. 88 EIGRP 88.0 Else, if the jsonPayload.ip_protocol log field value contains one of the following values, then the network.ip_protocol UDM field is set to ETHERIP. 97 ETHERIP 97.0 Else, if the jsonPayload.ip_protocol log field value contains one of the following values, then the network.ip_protocol UDM field is set to PIM. 103 PIM 103.0 Else, if the jsonPayload.ip_protocol log field value contains one of the following values, then the network.ip_protocol UDM field is set to VRRP. 112 VRRP 112.0
jsonPayload.name	security_result.threat_name
jsonPayload.network	target.resource.name	If the jsonPayload.direction log field value is equal to client-to-server or the logName log field value matches the regular expression pattern traffic, then the jsonPayload.network log field is mapped to the target.resource.name UDM field.
jsonPayload.network	principal.resource.name	If the jsonPayload.direction log field value is equal to server-to-client, then the jsonPayload.network log field is mapped to the principal.resource.name UDM field.
	target.resource.resource_type	If the jsonPayload.direction log field value is equal to client-to-server or the logName log field value matches the regular expression pattern traffic, then the target.resource.resource_type UDM field is set to VPC_NETWORK.
	principal.resource.resource_type	If the jsonPayload.direction log field value is equal to server-to-client, then the principal.resource.resource_type UDM field is set to VPC_NETWORK.
jsonPayload.repeat_count	security_result.detection_fields[repeat_count]
jsonPayload.session_id	network.session_id
jsonPayload.source_ip_address	principal.ip
jsonPayload.source_port	principal.port
jsonPayload.start_time	about.labels[start_time] (deprecated)
jsonPayload.start_time	additional.fields[start_time]
jsonPayload.threat_id	security_result.threat_id
jsonPayload.total_bytes	about.labels[total_bytes] (deprecated)
jsonPayload.total_bytes	additional.fields[total_bytes]
jsonPayload.total_packets	about.labels[total_packets] (deprecated)
jsonPayload.total_packets	additional.fields[total_packets]
jsonPayload.type	security_result.detection_fields[type]
jsonPayload.uri_or_filename	target.file.full_path
logName	security_result.category_details
receiveTimestamp	metadata.collected_timestamp
resource.labels.id	observer.resource.product_object_id
resource.labels.location	observer.location.name
resource.labels.resource_container	observer.resource.name
resource.type	observer.resource.resource_subtype
timestamp	metadata.event_timestamp	If the logName log field value matches the regular expression pattern traffic, then the timestamp log field is mapped to the metadata.event_timestamp UDM field.
	observer.resource.resource_type	The observer.resource.resource_type UDM field is set to CLOUD_PROJECT.
	observer.resource.attribute.cloud.environment	The observer.resource.attribute.cloud.environment UDM field is set to GOOGLE_CLOUD_PLATFORM.
	idm.is_alert	If the jsonPayload.alert_severity log field value is equal to CRITICAL, then the idm.is_alert UDM field is set to true.
	idm.is_significant	If the jsonPayload.alert_severity log field value is equal to CRITICAL, then the idm.is_significant UDM field is set to true.
	security_result.category	If the jsonPayload.category log field value is equal to dos, then the security_result.category UDM field is set to NETWORK_DENIAL_OF_SERVICE. Else, if the jsonPayload.category log field value is equal to info-leak, then the security_result.category UDM field is set to NETWORK_SUSPICIOUS. Else, if the jsonPayload.category log field value is equal to protocol-anomaly, then the security_result.category UDM field is set to NETWORK_MALICIOUS. Else, if the jsonPayload.category log field value contains one of the following values, then the security_result.category UDM field is set to SOFTWARE_MALICIOUS. backdoor spyware trojan
	extensions.vulns.vulnerabilities.vendor	if the jsonPayload.cves log field value is not empty, then the extensions.vulns.vulnerabilities.vendor UDM field is set to GCP_IDS.
	metadata.product_name	The metadata.product_name UDM field is set to GCP_IDS.
	metadata.vendor_name	The metadata.vendor_name UDM field is set to Google Cloud Platform.
	metadata.event_type	If the jsonPayload.cves log field value is not empty, then the metadata.event_type UDM field is set to SCAN_VULN_NETWROK. Else, if the jsonPayload.source_ip_address log field value is not empty, then the metadata.event_type UDM field is set to SCAN_NETWORK. Else, the metadata.event_type UDM field is set to GENERIC_EVENT.

Étape suivante

• Ingestion de données dans Google Security Operations