Azure DevOps PAT used with Browser.

AzureDevOpsAuditing
| where AuthenticationMechanism startswith "PAT"
// Look for useragents that include a redenring engine
| where UserAgent has_any ("Gecko", "WebKit", "Presto", "Trident", "EdgeHTML", "Blink")
| extend timestamp = TimeGenerated, AccountCustomEntity = ActorUPN, IPCustomEntity = IpAddress

queryFrequency: 1d
entityMappings:
- entityType: Account
  fieldMappings:
  - columnName: AccountCustomEntity
    identifier: FullName
- entityType: IP
  fieldMappings:
  - columnName: IPCustomEntity
    identifier: Address
severity: Medium
triggerThreshold: 0
query: |
  AzureDevOpsAuditing
  | where AuthenticationMechanism startswith "PAT"
  // Look for useragents that include a redenring engine
  | where UserAgent has_any ("Gecko", "WebKit", "Presto", "Trident", "EdgeHTML", "Blink")
  | extend timestamp = TimeGenerated, AccountCustomEntity = ActorUPN, IPCustomEntity = IpAddress  
id: 5f0d80db-3415-4265-9d52-8466b7372e3a
triggerOperator: gt
version: 1.0.1
requiredDataConnectors: []
description: |
  'Personal Access Tokens (PATs) are used as an alternate password to authenticate into Azure DevOps. PATs are intended for programmatic access use in code or applications. 
  This can be prone to attacker theft if not adequately secured. This query looks for the use of a PAT in authentication but from a User Agent indicating a browser. 
  This should not be normal activity and could be an indicator of an attacker using a stolen PAT.'  
queryPeriod: 1d
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/AzureDevOpsAuditing/Analytic Rules/ADOPATUsedWithBrowser.yaml
status: Available
name: Azure DevOps PAT used with Browser.
tactics:
- CredentialAccess
kind: Scheduled

{
  "$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/5f0d80db-3415-4265-9d52-8466b7372e3a')]",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/5f0d80db-3415-4265-9d52-8466b7372e3a')]",
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules",
      "kind": "Scheduled",
      "apiVersion": "2022-11-01",
      "properties": {
        "displayName": "Azure DevOps PAT used with Browser.",
        "description": "'Personal Access Tokens (PATs) are used as an alternate password to authenticate into Azure DevOps. PATs are intended for programmatic access use in code or applications. \nThis can be prone to attacker theft if not adequately secured. This query looks for the use of a PAT in authentication but from a User Agent indicating a browser. \nThis should not be normal activity and could be an indicator of an attacker using a stolen PAT.'\n",
        "severity": "Medium",
        "enabled": true,
        "query": "AzureDevOpsAuditing\n| where AuthenticationMechanism startswith \"PAT\"\n// Look for useragents that include a redenring engine\n| where UserAgent has_any (\"Gecko\", \"WebKit\", \"Presto\", \"Trident\", \"EdgeHTML\", \"Blink\")\n| extend timestamp = TimeGenerated, AccountCustomEntity = ActorUPN, IPCustomEntity = IpAddress\n",
        "queryFrequency": "P1D",
        "queryPeriod": "P1D",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0,
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "CredentialAccess"
        ],
        "alertRuleTemplateName": "5f0d80db-3415-4265-9d52-8466b7372e3a",
        "customDetails": null,
        "entityMappings": [
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "identifier": "FullName",
                "columnName": "AccountCustomEntity"
              }
            ]
          },
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "identifier": "Address",
                "columnName": "IPCustomEntity"
              }
            ]
          }
        ],
        "status": "Available",
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/AzureDevOpsAuditing/Analytic Rules/ADOPATUsedWithBrowser.yaml",
        "templateVersion": "1.0.1"
      }
    }
  ]
}