Apache - Put suspicious file

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Id	c5d69e46-3b00-11ec-8d3d-0242ac130003
Rulename	Apache - Put suspicious file
Description	Detects PUT or POST of suspicious file
Severity	Medium
Tactics	InitialAccess Exfiltration
Techniques	T1190 T1133 T1048
Required data connectors	ApacheHTTPServer
Kind	Scheduled
Query frequency	1h
Query period	1h
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/ApacheHTTPServer/Analytic Rules/ApachePutSuspiciousFiles.yaml
Version	1.0.0
Arm template	c5d69e46-3b00-11ec-8d3d-0242ac130003.json

KQL

ApacheHTTPServer
| where HttpRequestMethod in~ ("POST", "PUT") 
| extend File = extract(@"(.*\/)?(.*)", 2, tostring(UrlOriginal))
| where isnotempty(File)
| where File matches regex @"([a-zA-Z0-9-_]+\.)([a-zA-Z0-9-]+\.[a-zA-Z0-9-]+)"
| extend FileCustomEntity = File, UrlCustomEntity = UrlOriginal

YAML

triggerOperator: gt
queryFrequency: 1h
description: |
    'Detects PUT or POST of suspicious file'
status: Available
kind: Scheduled
triggerThreshold: 0
requiredDataConnectors:
- connectorId: ApacheHTTPServer
  dataTypes:
  - ApacheHTTPServer
version: 1.0.0
queryPeriod: 1h
name: Apache - Put suspicious file
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/ApacheHTTPServer/Analytic Rules/ApachePutSuspiciousFiles.yaml
id: c5d69e46-3b00-11ec-8d3d-0242ac130003
tactics:
- InitialAccess
- Exfiltration
relevantTechniques:
- T1190
- T1133
- T1048
severity: Medium
entityMappings:
- fieldMappings:
  - identifier: Name
    columnName: FileCustomEntity
  entityType: File
- fieldMappings:
  - identifier: Url
    columnName: UrlCustomEntity
  entityType: URL
query: |
  ApacheHTTPServer
  | where HttpRequestMethod in~ ("POST", "PUT") 
  | extend File = extract(@"(.*\/)?(.*)", 2, tostring(UrlOriginal))
  | where isnotempty(File)
  | where File matches regex @"([a-zA-Z0-9-_]+\.)([a-zA-Z0-9-]+\.[a-zA-Z0-9-]+)"
  | extend FileCustomEntity = File, UrlCustomEntity = UrlOriginal

ARM

{
  "$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/c5d69e46-3b00-11ec-8d3d-0242ac130003')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/c5d69e46-3b00-11ec-8d3d-0242ac130003')]",
      "properties": {
        "alertRuleTemplateName": "c5d69e46-3b00-11ec-8d3d-0242ac130003",
        "customDetails": null,
        "description": "'Detects PUT or POST of suspicious file'\n",
        "displayName": "Apache - Put suspicious file",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "File",
            "fieldMappings": [
              {
                "columnName": "FileCustomEntity",
                "identifier": "Name"
              }
            ]
          },
          {
            "entityType": "URL",
            "fieldMappings": [
              {
                "columnName": "UrlCustomEntity",
                "identifier": "Url"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/ApacheHTTPServer/Analytic Rules/ApachePutSuspiciousFiles.yaml",
        "query": "ApacheHTTPServer\n| where HttpRequestMethod in~ (\"POST\", \"PUT\") \n| extend File = extract(@\"(.*\\/)?(.*)\", 2, tostring(UrlOriginal))\n| where isnotempty(File)\n| where File matches regex @\"([a-zA-Z0-9-_]+\\.)([a-zA-Z0-9-]+\\.[a-zA-Z0-9-]+)\"\n| extend FileCustomEntity = File, UrlCustomEntity = UrlOriginal\n",
        "queryFrequency": "PT1H",
        "queryPeriod": "PT1H",
        "severity": "Medium",
        "status": "Available",
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "Exfiltration",
          "InitialAccess"
        ],
        "techniques": [
          "T1048",
          "T1133",
          "T1190"
        ],
        "templateVersion": "1.0.0",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}