Google SecOps - GCTI Threat Intelligence Finding | Microsoft Sentinel Analytic Rules

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Id	b3e7f921-5c4a-4d8e-a2f9-7b1d3e6c9a5f
Rulename	Google SecOps - GCTI Threat Intelligence Finding
Description	Creates incidents in Microsoft Sentinel when Google Security Operations raises an active threat intelligence alert (GCTI_FINDING). These alerts are generated by Google’s global threat intel corpus and represent high-confidence threats, distinct from customer-authored rule detections.
Severity	High
Tactics	InitialAccess Execution CommandAndControl Exfiltration
Techniques	T1078 T1566 T1071 T1048
Required data connectors	GSDetectionAlerts
Kind	Scheduled
Query frequency	10m
Query period	10m
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/GoogleSecOps/Analytic%20Rules/GoogleSecOps-GCTIThreatIntelligenceFinding.yaml
Version	1.0.0
Arm template	b3e7f921-5c4a-4d8e-a2f9-7b1d3e6c9a5f.json

KQL

GoogleSecOpsDetectionAlerts
| where detectionType == "GCTI_FINDING"
| where alertState == "ALERTING"

YAML

incidentConfiguration:
  groupingConfiguration:
    groupByCustomDetails:
    - alert_identifier
    lookbackDuration: P1D
    enabled: true
    reopenClosedIncident: false
    matchingMethod: Selected
  createIncident: true
name: Google SecOps - GCTI Threat Intelligence Finding
triggerOperator: gt
query: |
  GoogleSecOpsDetectionAlerts
  | where detectionType == "GCTI_FINDING"
  | where alertState == "ALERTING"
queryFrequency: 10m
description: |
  Creates incidents in Microsoft Sentinel when Google Security Operations raises an active threat intelligence alert (GCTI_FINDING). These alerts are generated by Google's global threat intel corpus and represent high-confidence threats, distinct from customer-authored rule detections.
id: b3e7f921-5c4a-4d8e-a2f9-7b1d3e6c9a5f
triggerThreshold: 0
queryPeriod: 10m
version: 1.0.0
kind: Scheduled
customDetails:
  CorrelationIP: varCorrelationIp
  RuleId: ruleId
  PrincipalIP: varPrincipalIp
  RuleName: ruleName
  TargetIP: varTargetIp
  Description: description
  PrincipalHostname: varPrincipalHostname
  RiskScore: riskScore
  TargetHostname: varTargetHostname
  DetectionType: detectionType
  Severity: severity
  DetectionTime: detectionTime
  TargetUser: varTargetUserUserid
  PrincipalUser: varPrincipalUserUserid
  SourceUser: varSourceUserUserid
  alert_identifier: id
  SourceHostname: varSourceHostname
  SourceIP: varSourceIp
status: Available
eventGroupingSettings:
  aggregationKind: AlertPerResult
severity: High
requiredDataConnectors:
- connectorId: GSDetectionAlerts
  dataTypes:
  - DetectionAlerts_CL
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/GoogleSecOps/Analytic%20Rules/GoogleSecOps-GCTIThreatIntelligenceFinding.yaml
alertDetailsOverride:
  alertDescriptionFormat: 'Google Threat Intelligence confirmed finding. Rule: {{ruleName}}. {{description}}'
  alertDisplayNameFormat: 'GCTI Finding: {{ruleName}} : {{id}}'
relevantTechniques:
- T1078
- T1566
- T1071
- T1048
tactics:
- InitialAccess
- Execution
- CommandAndControl
- Exfiltration
entityMappings:
- fieldMappings:
  - identifier: Address
    columnName: varPrincipalIp
  entityType: IP
- fieldMappings:
  - identifier: Address
    columnName: varTargetIp
  entityType: IP
- fieldMappings:
  - identifier: Address
    columnName: varSourceIp
  entityType: IP
- fieldMappings:
  - identifier: Address
    columnName: varCorrelationIp
  entityType: IP
- fieldMappings:
  - identifier: Url
    columnName: urlBackToProduct
  entityType: URL

ARM

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "workspace": {
      "type": "String"
    }
  },
  "resources": [
    {
      "apiVersion": "2024-01-01-preview",
      "id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/b3e7f921-5c4a-4d8e-a2f9-7b1d3e6c9a5f')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/b3e7f921-5c4a-4d8e-a2f9-7b1d3e6c9a5f')]",
      "properties": {
        "alertDetailsOverride": {
          "alertDescriptionFormat": "Google Threat Intelligence confirmed finding. Rule: {{ruleName}}. {{description}}",
          "alertDisplayNameFormat": "GCTI Finding: {{ruleName}} : {{id}}"
        },
        "alertRuleTemplateName": "b3e7f921-5c4a-4d8e-a2f9-7b1d3e6c9a5f",
        "customDetails": {
          "alert_identifier": "id",
          "CorrelationIP": "varCorrelationIp",
          "Description": "description",
          "DetectionTime": "detectionTime",
          "DetectionType": "detectionType",
          "PrincipalHostname": "varPrincipalHostname",
          "PrincipalIP": "varPrincipalIp",
          "PrincipalUser": "varPrincipalUserUserid",
          "RiskScore": "riskScore",
          "RuleId": "ruleId",
          "RuleName": "ruleName",
          "Severity": "severity",
          "SourceHostname": "varSourceHostname",
          "SourceIP": "varSourceIp",
          "SourceUser": "varSourceUserUserid",
          "TargetHostname": "varTargetHostname",
          "TargetIP": "varTargetIp",
          "TargetUser": "varTargetUserUserid"
        },
        "description": "Creates incidents in Microsoft Sentinel when Google Security Operations raises an active threat intelligence alert (GCTI_FINDING). These alerts are generated by Google's global threat intel corpus and represent high-confidence threats, distinct from customer-authored rule detections.\n",
        "displayName": "Google SecOps - GCTI Threat Intelligence Finding",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "columnName": "varPrincipalIp",
                "identifier": "Address"
              }
            ]
          },
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "columnName": "varTargetIp",
                "identifier": "Address"
              }
            ]
          },
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "columnName": "varSourceIp",
                "identifier": "Address"
              }
            ]
          },
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "columnName": "varCorrelationIp",
                "identifier": "Address"
              }
            ]
          },
          {
            "entityType": "URL",
            "fieldMappings": [
              {
                "columnName": "urlBackToProduct",
                "identifier": "Url"
              }
            ]
          }
        ],
        "eventGroupingSettings": {
          "aggregationKind": "AlertPerResult"
        },
        "incidentConfiguration": {
          "createIncident": true,
          "groupingConfiguration": {
            "enabled": true,
            "groupByCustomDetails": [
              "alert_identifier"
            ],
            "lookbackDuration": "P1D",
            "matchingMethod": "Selected",
            "reopenClosedIncident": false
          }
        },
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/GoogleSecOps/Analytic%20Rules/GoogleSecOps-GCTIThreatIntelligenceFinding.yaml",
        "query": "GoogleSecOpsDetectionAlerts\n| where detectionType == \"GCTI_FINDING\"\n| where alertState == \"ALERTING\"\n",
        "queryFrequency": "PT10M",
        "queryPeriod": "PT10M",
        "severity": "High",
        "status": "Available",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "CommandAndControl",
          "Execution",
          "Exfiltration",
          "InitialAccess"
        ],
        "techniques": [
          "T1048",
          "T1071",
          "T1078",
          "T1566"
        ],
        "templateVersion": "1.0.0",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}