Cisco WSA - Unexpected URL

let threshold = 5;
CiscoWSAEvent
| where UrlOriginal matches regex @'\Ahttp(s)?[:][/][/]\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}'
| extend URLCustomEntity = UrlOriginal, AccountCustomEntity = SrcUserName

OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/CiscoWSA/Analytic Rules/CiscoWSAUnexpectedUrl.yaml
entityMappings:
- fieldMappings:
  - identifier: Url
    columnName: URLCustomEntity
  entityType: URL
- fieldMappings:
  - identifier: Name
    columnName: AccountCustomEntity
  entityType: Account
kind: Scheduled
query: |
  let threshold = 5;
  CiscoWSAEvent
  | where UrlOriginal matches regex @'\Ahttp(s)?[:][/][/]\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}'
  | extend URLCustomEntity = UrlOriginal, AccountCustomEntity = SrcUserName  
triggerOperator: gt
version: 1.0.0
queryPeriod: 1h
name: Cisco WSA - Unexpected URL
severity: Medium
relevantTechniques:
- T1102
requiredDataConnectors:
- dataTypes:
  - CiscoWSAEvent
  connectorId: CiscoWSA
triggerThreshold: 0
tactics:
- CommandAndControl
queryFrequency: 1h
id: 010644fd-2830-4451-9e0e-606cc192f2e7
status: Available
description: |
    'Detects unexpected URL.'

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "workspace": {
      "type": "String"
    }
  },
  "resources": [
    {
      "apiVersion": "2023-02-01-preview",
      "id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/010644fd-2830-4451-9e0e-606cc192f2e7')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/010644fd-2830-4451-9e0e-606cc192f2e7')]",
      "properties": {
        "alertRuleTemplateName": "010644fd-2830-4451-9e0e-606cc192f2e7",
        "customDetails": null,
        "description": "'Detects unexpected URL.'\n",
        "displayName": "Cisco WSA - Unexpected URL",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "URL",
            "fieldMappings": [
              {
                "columnName": "URLCustomEntity",
                "identifier": "Url"
              }
            ]
          },
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "AccountCustomEntity",
                "identifier": "Name"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/CiscoWSA/Analytic Rules/CiscoWSAUnexpectedUrl.yaml",
        "query": "let threshold = 5;\nCiscoWSAEvent\n| where UrlOriginal matches regex @'\\Ahttp(s)?[:][/][/]\\d{1,3}\\.\\d{1,3}\\.\\d{1,3}\\.\\d{1,3}'\n| extend URLCustomEntity = UrlOriginal, AccountCustomEntity = SrcUserName\n",
        "queryFrequency": "PT1H",
        "queryPeriod": "PT1H",
        "severity": "Medium",
        "status": "Available",
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "CommandAndControl"
        ],
        "techniques": [
          "T1102"
        ],
        "templateVersion": "1.0.0",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}