Apache - Apache 2449 flaw CVE-2021-41773

ApacheHTTPServer
| where HttpRequestMethod =~ "GET"
| where UrlOriginal has_all ("/cgi-bin/", "/%2e%2e/")
| where HttpStatusCode == "200" 
| extend UrlCustomEntity = UrlOriginal

relevantTechniques:
- T1190
- T1133
- T1210
name: Apache - Apache 2.4.49 flaw CVE-2021-41773
requiredDataConnectors:
- dataTypes:
  - ApacheHTTPServer
  connectorId: ApacheHTTPServer
- datatypes:
  - ApacheHTTPServer_CL
  connectorId: CustomLogsAma
entityMappings:
- fieldMappings:
  - identifier: Url
    columnName: UrlCustomEntity
  entityType: URL
triggerThreshold: 0
id: 767f9dc4-3b01-11ec-8d3d-0242ac130003
tactics:
- InitialAccess
- LateralMovement
version: 1.0.2
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/ApacheHTTPServer/Analytic Rules/ApacheCVE-2021-41773.yaml
queryPeriod: 10m
kind: Scheduled
queryFrequency: 10m
severity: High
status: Available
description: |
    'Detects using Apache 2.4.49 flaw CVE-2021-41773'
query: |
  ApacheHTTPServer
  | where HttpRequestMethod =~ "GET"
  | where UrlOriginal has_all ("/cgi-bin/", "/%2e%2e/")
  | where HttpStatusCode == "200" 
  | extend UrlCustomEntity = UrlOriginal  
triggerOperator: gt

{
  "$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/767f9dc4-3b01-11ec-8d3d-0242ac130003')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/767f9dc4-3b01-11ec-8d3d-0242ac130003')]",
      "properties": {
        "alertRuleTemplateName": "767f9dc4-3b01-11ec-8d3d-0242ac130003",
        "customDetails": null,
        "description": "'Detects using Apache 2.4.49 flaw CVE-2021-41773'\n",
        "displayName": "Apache - Apache 2.4.49 flaw CVE-2021-41773",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "URL",
            "fieldMappings": [
              {
                "columnName": "UrlCustomEntity",
                "identifier": "Url"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/ApacheHTTPServer/Analytic Rules/ApacheCVE-2021-41773.yaml",
        "query": "ApacheHTTPServer\n| where HttpRequestMethod =~ \"GET\"\n| where UrlOriginal has_all (\"/cgi-bin/\", \"/%2e%2e/\")\n| where HttpStatusCode == \"200\" \n| extend UrlCustomEntity = UrlOriginal\n",
        "queryFrequency": "PT10M",
        "queryPeriod": "PT10M",
        "severity": "High",
        "status": "Available",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "InitialAccess",
          "LateralMovement"
        ],
        "techniques": [
          "T1133",
          "T1190",
          "T1210"
        ],
        "templateVersion": "1.0.2",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}