{
  "$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/34a5d79b-8f9a-420c-aa64-7f4d262ac29a')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/34a5d79b-8f9a-420c-aa64-7f4d262ac29a')]",
      "properties": {
        "alertDetailsOverride": {
          "alertDescriptionFormat": "{{UserId}} with new agent not seen previously in the Dataverse activity log.\nAgent: {{UserAgent}}\nLatest IP: {{LatestIP}}\n",
          "alertDisplayNameFormat": "Dataverse - new user agent detected in {{{InstanceUrl}} "
        },
        "alertRuleTemplateName": "34a5d79b-8f9a-420c-aa64-7f4d262ac29a",
        "customDetails": null,
        "description": "Identifies users accessing Dataverse from a User Agent that has not been seen in any Dataverse instance in the last 14 days.",
        "displayName": "Dataverse - New user agent type that was not used before",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "AccountName",
                "identifier": "Name"
              },
              {
                "columnName": "UPNSuffix",
                "identifier": "UPNSuffix"
              }
            ]
          },
          {
            "entityType": "CloudApplication",
            "fieldMappings": [
              {
                "columnName": "CloudAppId",
                "identifier": "AppId"
              },
              {
                "columnName": "InstanceUrl",
                "identifier": "InstanceName"
              }
            ]
          },
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "columnName": "LatestIP",
                "identifier": "Address"
              }
            ]
          }
        ],
        "eventGroupingSettings": {
          "aggregationKind": "AlertPerResult"
        },
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Microsoft%20Business%20Applications/Analytic%20Rules/Dataverse%20-%20New%20user%20agent%20type%20that%20was%20not%20used%20before.yaml",
        "query": "let query_lookback = 14d;\nlet query_frequency = 1h;\nlet known_useragents = dynamic([\n    // Enter known user agents to exclude.\n    // example:\n    // \"Agent1\", \"Agent2\", \"Agent3\"\n    ]);\nDataverseActivity\n| where TimeGenerated between(ago(query_lookback) .. ago(query_frequency))\n| where isnotempty(UserAgent)\n| summarize by UserAgent\n| join kind = rightanti (DataverseActivity\n    | where TimeGenerated > ago(query_frequency)\n    | where not (UserId has_any (\"@onmicrosoft.com\", \"@microsoft.com\", \"Unknown\"))\n    | where isnotempty(UserAgent)\n    | where UserAgent !in~ (known_useragents)\n    | where UserAgent !hasprefix \"azure-logic-apps\" and UserAgent !hasprefix \"PowerApps\")\n    on UserAgent\n// Exclude user agents with a render agent to reduce noise.\n| join kind = leftanti(\n    DataverseActivity\n    | where TimeGenerated > ago(query_frequency)\n    | where UserAgent has_any (\"Gecko\", \"WebKit\", \"Presto\", \"Trident\", \"EdgeHTML\", \"Blink\"))\n    on UserAgent\n| summarize\n    FirstSeen = min(TimeGenerated),\n    LatestIP = arg_max(ClientIp, TimeGenerated)\n    by UserAgent, UserId, InstanceUrl\n| extend\n    AccountName = tostring(split(UserId, '@')[0]),\n    UPNSuffix = tostring(split(UserId, '@')[1]),\n    CloudAppId = int(32780)\n| project\n    FirstSeen,\n    UserId,\n    UserAgent,\n    LatestIP,\n    InstanceUrl,\n    CloudAppId,\n    AccountName,\n    UPNSuffix\n",
        "queryFrequency": "PT1H",
        "queryPeriod": "P14D",
        "severity": "Low",
        "status": "Available",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "DefenseEvasion",
          "InitialAccess"
        ],
        "techniques": [
          "T1036",
          "T1078"
        ],
        "templateVersion": "3.2.0",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}