PaloAlto - File type changed

PaloAltoCDLEvent
| where EventResourceId =~ 'THREAT'
| where EventResult =~ 'file'
| where FileType != OldFileType
| extend FileCustomEntity = SrcFileName, AccountCustomEntity = DstUsername

relevantTechniques:
- T1190
- T1133
name: PaloAlto - File type changed
requiredDataConnectors:
- dataTypes:
  - CommonSecurityLog
  connectorId: CefAma
entityMappings:
- fieldMappings:
  - identifier: Name
    columnName: AccountCustomEntity
  entityType: Account
- fieldMappings:
  - identifier: Name
    columnName: FileCustomEntity
  entityType: File
triggerThreshold: 0
id: 9150ad68-51c8-11ec-bf63-0242ac130002
tactics:
- InitialAccess
version: 1.0.3
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/PaloAltoCDL/Analytic Rules/PaloAltoCDLFileTypeWasChanged.yaml
queryPeriod: 1h
kind: Scheduled
queryFrequency: 1h
severity: Medium
status: Available
description: |
    'Detects when file type changed.'
query: |
  PaloAltoCDLEvent
  | where EventResourceId =~ 'THREAT'
  | where EventResult =~ 'file'
  | where FileType != OldFileType
  | extend FileCustomEntity = SrcFileName, AccountCustomEntity = DstUsername  
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/9150ad68-51c8-11ec-bf63-0242ac130002')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/9150ad68-51c8-11ec-bf63-0242ac130002')]",
      "properties": {
        "alertRuleTemplateName": "9150ad68-51c8-11ec-bf63-0242ac130002",
        "customDetails": null,
        "description": "'Detects when file type changed.'\n",
        "displayName": "PaloAlto - File type changed",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "AccountCustomEntity",
                "identifier": "Name"
              }
            ]
          },
          {
            "entityType": "File",
            "fieldMappings": [
              {
                "columnName": "FileCustomEntity",
                "identifier": "Name"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/PaloAltoCDL/Analytic Rules/PaloAltoCDLFileTypeWasChanged.yaml",
        "query": "PaloAltoCDLEvent\n| where EventResourceId =~ 'THREAT'\n| where EventResult =~ 'file'\n| where FileType != OldFileType\n| extend FileCustomEntity = SrcFileName, AccountCustomEntity = DstUsername\n",
        "queryFrequency": "PT1H",
        "queryPeriod": "PT1H",
        "severity": "Medium",
        "status": "Available",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "InitialAccess"
        ],
        "techniques": [
          "T1133",
          "T1190"
        ],
        "templateVersion": "1.0.3",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}