Apache - Request to sensitive files

let forbidden_files = dynamic(['shadow', 'passwd', 'id_rsa']);
ApacheHTTPServer
| where isnotempty(UrlOriginal)
| extend File = extract(@'(.*\/)?(.*)', 2, tostring(UrlOriginal))
| where File in~ (forbidden_files)
| extend FileCustomEntity = File, UrlCustomEntity = UrlOriginal

triggerOperator: gt
id: d1c52578-3afc-11ec-8d3d-0242ac130003
queryFrequency: 1h
entityMappings:
- entityType: File
  fieldMappings:
  - columnName: FileCustomEntity
    identifier: Name
- entityType: URL
  fieldMappings:
  - columnName: UrlCustomEntity
    identifier: Url
requiredDataConnectors:
- dataTypes:
  - ApacheHTTPServer
  connectorId: ApacheHTTPServer
severity: Medium
triggerThreshold: 0
kind: Scheduled
status: Available
queryPeriod: 1h
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/ApacheHTTPServer/Analytic Rules/ApacheRequestToSensitiveFiles.yaml
query: |
  let forbidden_files = dynamic(['shadow', 'passwd', 'id_rsa']);
  ApacheHTTPServer
  | where isnotempty(UrlOriginal)
  | extend File = extract(@'(.*\/)?(.*)', 2, tostring(UrlOriginal))
  | where File in~ (forbidden_files)
  | extend FileCustomEntity = File, UrlCustomEntity = UrlOriginal  
description: |
    'Detects request to sensitive files.'
name: Apache - Request to sensitive files
relevantTechniques:
- T1189
tactics:
- InitialAccess
version: 1.0.0

{
  "$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/d1c52578-3afc-11ec-8d3d-0242ac130003')]",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/d1c52578-3afc-11ec-8d3d-0242ac130003')]",
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules",
      "kind": "Scheduled",
      "apiVersion": "2022-11-01",
      "properties": {
        "displayName": "Apache - Request to sensitive files",
        "description": "'Detects request to sensitive files.'\n",
        "severity": "Medium",
        "enabled": true,
        "query": "let forbidden_files = dynamic(['shadow', 'passwd', 'id_rsa']);\nApacheHTTPServer\n| where isnotempty(UrlOriginal)\n| extend File = extract(@'(.*\\/)?(.*)', 2, tostring(UrlOriginal))\n| where File in~ (forbidden_files)\n| extend FileCustomEntity = File, UrlCustomEntity = UrlOriginal\n",
        "queryFrequency": "PT1H",
        "queryPeriod": "PT1H",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0,
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "InitialAccess"
        ],
        "techniques": [
          "T1189"
        ],
        "alertRuleTemplateName": "d1c52578-3afc-11ec-8d3d-0242ac130003",
        "customDetails": null,
        "entityMappings": [
          {
            "fieldMappings": [
              {
                "identifier": "Name",
                "columnName": "FileCustomEntity"
              }
            ],
            "entityType": "File"
          },
          {
            "fieldMappings": [
              {
                "identifier": "Url",
                "columnName": "UrlCustomEntity"
              }
            ],
            "entityType": "URL"
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/ApacheHTTPServer/Analytic Rules/ApacheRequestToSensitiveFiles.yaml",
        "templateVersion": "1.0.0",
        "status": "Available"
      }
    }
  ]
}