Impact: Deleted Google Cloud Backup and DR Backup

This document describes a threat finding type in Security Command Center. Threat findings are generated by threat detectors when they detect a potential threat in your cloud resources. For a full list of available threat findings, see Threat findings index.

Overview

Event Threat Detection examines audit logs to detect whether a backup stored in a backup vault has been deleted.

Event Threat Detection is the source of this finding.

How to respond

To respond to this finding, do the following:

Step 1: Review finding details

  1. Open the Impact: Deleted Google Cloud Backup and DR Backup finding, as detailed in Reviewing findings. The details panel for the finding opens to the Summary tab.
  2. On the Summary tab, review the information in the following sections:
    • What was detected, especially the following fields:
      • Description: information about the detection.
      • Principal subject: a user or service account that has successfully executed an action.
    • Affected resource
      • Resource display name: the project in which the backup frequency was reduced.
    • Related links, especially the following fields:
      • MITRE ATTACK method: link to the MITRE ATT&CK documentation.
      • Logging URI: link to open the Logs Explorer.

Step 2: Research attack and response methods

Contact the owner of the service account in the Principal subject field and confirm whether they conducted the action.

Example finding JSON

The following is an example of the finding JSON.

{
  "finding": {
    "access": {
      "principalEmail": "USER_EMAIL",
      "callerIp": "CALLER_IP",
      "callerIpGeo": {
        "regionCode": "REGION_CODE"
      },
      "serviceName": "backupdr.googleapis.com",
      "methodName": "google.cloud.backupdr.v1.BackupDR.DeleteBackup",
      "principalSubject": "user:USER_EMAIL"
    },
    "attackExposure": {},
    "canonicalName": "projects/PROJECT_NUMBER/sources/SOURCE_ID/locations/FINDING_LOCATION/findings/FINDING_ID",
    "category": "Impact: Deleted Google Cloud Backup and DR Backup",
    "cloudDlpDataProfile": {},
    "cloudDlpInspection": {},
    "createTime": "EVENT_TIMESTAMP",
    "database": {},
    "description": "A backup stored in a backup vault has been manually deleted. The backup was stored in REGION",
    "eventTime": "EVENT_TIMESTAMP",
    "exfiltration": {},
    "findingClass": "THREAT",
    "findingProviderId": "organizations/ORGANIZATION_ID/firstPartyFindingProviders/etd",
    "indicator": {},
    "kernelRootkit": {},
    "kubernetes": {},
    "mitreAttack": {
      "primaryTactic": "IMPACT",
      "primaryTechniques": [
        "DATA_DESTRUCTION"
      ]
    },
    "mute": "UNDEFINED",
    "name": "organizations/ORGANIZATION_ID/sources/SOURCE_ID/findings/FINDING_ID",
    "parent": "organizations/ORGANIZATION_ID/sources/SOURCE_ID",
    "parentDisplayName": "Event Threat Detection",
    "resourceName": "//cloudresourcemanager.googleapis.com/projects/PROJECT_NUMBER",
    "severity": "MEDIUM",
    "state": "ACTIVE",
    "vulnerability": {},
    "externalSystems": {}
  },
  "resource": {
    "name": "//cloudresourcemanager.googleapis.com/projects/PROJECT_NUMBER",
    "display_name": "PROJECT_ID",
    "type": "google.cloud.resourcemanager.Project",
    "project_name": "//cloudresourcemanager.googleapis.com/projects/PROJECT_NUMBER",
    "project_display_name": "PROJECT_ID",
    "parent_name": "//cloudresourcemanager.googleapis.com/organizations/ORGANIZATION_ID",
    "parent_display_name": "FOLDER_NAME",
    "folders": []
  },
  "sourceProperties": {
    "sourceId": {
      "projectNumber": "PROJECT_NUMBER",
      "customerOrganizationNumber": "ORGANIZATION_ID"
    },
    "detectionCategory": {
      "ruleName": "backup_delete_vault_backup"
    },
    "detectionPriority": "HIGH",
    "affectedResources": [
      {
        "gcpResourceName": "//backupdr.googleapis.com/projects/PROJECT_NUMBER/locations/REGION/backupVaults/VAULT_ID/dataSources/DATA_SOURCE_NAME/backups/BACKUP_ID"
      },
      {
        "gcpResourceName": "//cloudresourcemanager.googleapis.com/projects/PROJECT_NUMBER"
      }
    ],
    "evidence": [
      {
        "sourceLogId": {
          "projectId": "PROJECT_ID",
          "resourceContainer": "projects/PROJECT_ID",
          "timestamp": {
            "seconds": "0",
            "nanos": 0.0
          },
          "insertId": "INSERT_ID"
        }
      }
    ],
    "properties": {},
    "findingId": "FINDING_ID",
    "contextUris": {
      "mitreUri": {
        "displayName": "MITRE Link",
        "url": "https://attack.mitre.org/techniques/T1485/"
      },
      "cloudLoggingQueryUri": [
        {
          "displayName": "Cloud Logging Query Link",
          "url": "LINK_TO_LOG_QUERY"
        }
      ],
      "relatedFindingUri": {}
    },
    "description": "A backup stored in a backup vault has been manually deleted. The backup was stored in REGION"
  }
}

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