GCP IAM - Empty user agent

GCP_IAM
| where isempty(HttpUserAgentOriginal)
| extend timestamp = TimeGenerated, AccountCustomEntity = PayloadAuthenticationinfoPrincipalemail, IPCustomEntity = SrcIpAddr

queryFrequency: 1h
triggerOperator: gt
tactics:
- DefenseEvasion
description: |
    'Detects requests where user agent is empty.'
status: Available
relevantTechniques:
- T1550
name: GCP IAM - Empty user agent
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/GoogleCloudPlatformIAM/Analytic Rules/GCPIAMEmptyUA.yaml
severity: Medium
triggerThreshold: 0
version: 1.0.0
entityMappings:
- entityType: Account
  fieldMappings:
  - identifier: FullName
    columnName: AccountCustomEntity
- entityType: IP
  fieldMappings:
  - identifier: Address
    columnName: IPCustomEntity
query: |
  GCP_IAM
  | where isempty(HttpUserAgentOriginal)
  | extend timestamp = TimeGenerated, AccountCustomEntity = PayloadAuthenticationinfoPrincipalemail, IPCustomEntity = SrcIpAddr  
id: 9e0d8632-d33d-4075-979e-c972674f77b3
requiredDataConnectors:
- connectorId: GCPIAMDataConnector
  dataTypes:
  - GCP_IAM
kind: Scheduled
queryPeriod: 1h

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "workspace": {
      "type": "String"
    }
  },
  "resources": [
    {
      "id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/9e0d8632-d33d-4075-979e-c972674f77b3')]",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/9e0d8632-d33d-4075-979e-c972674f77b3')]",
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules",
      "kind": "Scheduled",
      "apiVersion": "2022-11-01",
      "properties": {
        "displayName": "GCP IAM - Empty user agent",
        "description": "'Detects requests where user agent is empty.'\n",
        "severity": "Medium",
        "enabled": true,
        "query": "GCP_IAM\n| where isempty(HttpUserAgentOriginal)\n| extend timestamp = TimeGenerated, AccountCustomEntity = PayloadAuthenticationinfoPrincipalemail, IPCustomEntity = SrcIpAddr\n",
        "queryFrequency": "PT1H",
        "queryPeriod": "PT1H",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0,
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "DefenseEvasion"
        ],
        "techniques": [
          "T1550"
        ],
        "alertRuleTemplateName": "9e0d8632-d33d-4075-979e-c972674f77b3",
        "customDetails": null,
        "entityMappings": [
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "identifier": "FullName",
                "columnName": "AccountCustomEntity"
              }
            ]
          },
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "identifier": "Address",
                "columnName": "IPCustomEntity"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/GoogleCloudPlatformIAM/Analytic Rules/GCPIAMEmptyUA.yaml",
        "status": "Available",
        "templateVersion": "1.0.0"
      }
    }
  ]
}