Cloudflare - Unexpected URI

Cloudflare
| where HttpRequestMethod =~ 'GET'
| where DstBytes != 0 or SrcBytes != 0
| where ClientRequestURI matches regex @'(127\.\d{1,3}\.\d{1,3}\.\d{1,3})|(10\.\d{1,3}\.\d{1,3}\.\d{1,3})|(172\.1[6-9]\.\d{1,3}\.\d{1,3})|(172\.2[0-9]\.\d{1,3}\.\d{1,3})|(172\.3[0-1]\.\d{1,3}\.\d{1,3})|(192\.168\.\d{1,3}\.\d{1,3})'
| extend IPCustomEntity = SrcIpAddr

queryPeriod: 1h
version: 1.0.0
kind: Scheduled
triggerThreshold: 0
relevantTechniques:
- T1190
- T1133
triggerOperator: gt
entityMappings:
- fieldMappings:
  - identifier: Address
    columnName: IPCustomEntity
  entityType: IP
query: |
  Cloudflare
  | where HttpRequestMethod =~ 'GET'
  | where DstBytes != 0 or SrcBytes != 0
  | where ClientRequestURI matches regex @'(127\.\d{1,3}\.\d{1,3}\.\d{1,3})|(10\.\d{1,3}\.\d{1,3}\.\d{1,3})|(172\.1[6-9]\.\d{1,3}\.\d{1,3})|(172\.2[0-9]\.\d{1,3}\.\d{1,3})|(172\.3[0-1]\.\d{1,3}\.\d{1,3})|(192\.168\.\d{1,3}\.\d{1,3})'
  | extend IPCustomEntity = SrcIpAddr  
name: Cloudflare - Unexpected URI
queryFrequency: 1h
requiredDataConnectors:
- connectorId: CloudflareDataConnector
  dataTypes:
  - Cloudflare
description: |
    'Detects client requests to unusual URI.'
status: Available
id: dcb797cd-a4cd-4306-897b-7991f71d7e27
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cloudflare/Analytic Rules/CloudflareUnexpectedUrl.yaml
tactics:
- InitialAccess
severity: Medium

{
  "$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/dcb797cd-a4cd-4306-897b-7991f71d7e27')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/dcb797cd-a4cd-4306-897b-7991f71d7e27')]",
      "properties": {
        "alertRuleTemplateName": "dcb797cd-a4cd-4306-897b-7991f71d7e27",
        "customDetails": null,
        "description": "'Detects client requests to unusual URI.'\n",
        "displayName": "Cloudflare - Unexpected URI",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "columnName": "IPCustomEntity",
                "identifier": "Address"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cloudflare/Analytic Rules/CloudflareUnexpectedUrl.yaml",
        "query": "Cloudflare\n| where HttpRequestMethod =~ 'GET'\n| where DstBytes != 0 or SrcBytes != 0\n| where ClientRequestURI matches regex @'(127\\.\\d{1,3}\\.\\d{1,3}\\.\\d{1,3})|(10\\.\\d{1,3}\\.\\d{1,3}\\.\\d{1,3})|(172\\.1[6-9]\\.\\d{1,3}\\.\\d{1,3})|(172\\.2[0-9]\\.\\d{1,3}\\.\\d{1,3})|(172\\.3[0-1]\\.\\d{1,3}\\.\\d{1,3})|(192\\.168\\.\\d{1,3}\\.\\d{1,3})'\n| extend IPCustomEntity = SrcIpAddr\n",
        "queryFrequency": "PT1H",
        "queryPeriod": "PT1H",
        "severity": "Medium",
        "status": "Available",
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "InitialAccess"
        ],
        "techniques": [
          "T1133",
          "T1190"
        ],
        "templateVersion": "1.0.0",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}