GWorkspace - Multiple user agents for single source

let threshold = 5;
GWorkspaceActivityReports
| where isnotempty(UserAgentOriginal)
| summarize user_ua = makeset(UserAgentOriginal) by SrcIpAddr, bin(TimeGenerated, 5m)
| where array_length(user_ua) > threshold
| extend IPCustomEntity = SrcIpAddr

query: |
  let threshold = 5;
  GWorkspaceActivityReports
  | where isnotempty(UserAgentOriginal)
  | summarize user_ua = makeset(UserAgentOriginal) by SrcIpAddr, bin(TimeGenerated, 5m)
  | where array_length(user_ua) > threshold
  | extend IPCustomEntity = SrcIpAddr  
queryPeriod: 1h
queryFrequency: 1h
status: Available
id: 6ff0e16e-5999-11ec-bf63-0242ac130002
entityMappings:
- entityType: IP
  fieldMappings:
  - columnName: IPCustomEntity
    identifier: Address
relevantTechniques:
- T1185
- T1176
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/GoogleWorkspaceReports/Analytic Rules/GWorkspaceDifferentUAsFromSingleIP.yaml
requiredDataConnectors:
- connectorId: GoogleWorkspaceReportsAPI
  dataTypes:
  - GWorkspaceActivityReports
name: GWorkspace - Multiple user agents for single source
description: |
    'Detects requests with different user agents from one source in short timeframe.'
tactics:
- Persistence
- Collection
severity: Medium
triggerThreshold: 0
version: 1.0.1
kind: Scheduled
triggerOperator: gt

{
  "$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/6ff0e16e-5999-11ec-bf63-0242ac130002')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/6ff0e16e-5999-11ec-bf63-0242ac130002')]",
      "properties": {
        "alertRuleTemplateName": "6ff0e16e-5999-11ec-bf63-0242ac130002",
        "customDetails": null,
        "description": "'Detects requests with different user agents from one source in short timeframe.'\n",
        "displayName": "GWorkspace - Multiple user agents for single source",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "columnName": "IPCustomEntity",
                "identifier": "Address"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/GoogleWorkspaceReports/Analytic Rules/GWorkspaceDifferentUAsFromSingleIP.yaml",
        "query": "let threshold = 5;\nGWorkspaceActivityReports\n| where isnotempty(UserAgentOriginal)\n| summarize user_ua = makeset(UserAgentOriginal) by SrcIpAddr, bin(TimeGenerated, 5m)\n| where array_length(user_ua) > threshold\n| extend IPCustomEntity = SrcIpAddr\n",
        "queryFrequency": "PT1H",
        "queryPeriod": "PT1H",
        "severity": "Medium",
        "status": "Available",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "Collection",
          "Persistence"
        ],
        "techniques": [
          "T1176",
          "T1185"
        ],
        "templateVersion": "1.0.1",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}