Scheduled Task Creation or Update from User Writable Directory

// Enter a reference list for writable user paths"
let WritableUserPaths = dynamic (["\"C:\\Users\\","\"C:\\ProgramData\\"]);
SecurityEvent
| where EventID in (4698,4702) and EventData has_any (WritableUserPaths)
| parse EventData with * 'Command>' Command "&lt" *
| parse EventData with * 'Arguments>' Arguments "&lt" *
| where Command has_any (WritableUserPaths) or Arguments has_any (WritableUserPaths)
| parse EventData with * 'SubjectUserName">' SubjectUserName "<" * 'SubjectDomainName">' SubjectDomainName "<" * 'TaskName">' TaskName "<" *
| summarize StartTime = min(TimeGenerated), EndTime = max(TimeGenerated) by Activity, Computer, SubjectUserName, SubjectDomainName, TaskName, Command, Arguments

name: Scheduled Task Creation or Update from User Writable Directory
requiredDataConnectors:
- dataTypes:
  - SecurityEvent
  connectorId: SecurityEvents
kind: Scheduled
entityMappings:
- fieldMappings:
  - identifier: FullName
    columnName: SubjectUserName
  entityType: Account
- fieldMappings:
  - identifier: FullName
    columnName: Computer
  entityType: Host
- fieldMappings:
  - identifier: CommandLine
    columnName: CommandLine
  entityType: Process
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Endpoint Threat Protection Essentials/Hunting Queries/ScheduledTaskCreationUpdateFromUserWritableDrectory.yaml
description: |
  'This query triggers when a scheduled task is created or updated and it is going to run programs from writable user paths.
  Ref: https://blog.menasec.net/2019/03/threat-hunting-25-scheduled-tasks-for.html'  
tactics:
- Execution
id: 0b827a49-427e-4721-b05e-b151a8af524e
version: 1.0.0
relevantTechniques:
- T1053.005
query: |
  // Enter a reference list for writable user paths"
  let WritableUserPaths = dynamic (["\"C:\\Users\\","\"C:\\ProgramData\\"]);
  SecurityEvent
  | where EventID in (4698,4702) and EventData has_any (WritableUserPaths)
  | parse EventData with * 'Command>' Command "&lt" *
  | parse EventData with * 'Arguments>' Arguments "&lt" *
  | where Command has_any (WritableUserPaths) or Arguments has_any (WritableUserPaths)
  | parse EventData with * 'SubjectUserName">' SubjectUserName "<" * 'SubjectDomainName">' SubjectDomainName "<" * 'TaskName">' TaskName "<" *
  | summarize StartTime = min(TimeGenerated), EndTime = max(TimeGenerated) by Activity, Computer, SubjectUserName, SubjectDomainName, TaskName, Command, Arguments  

{
  "$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/0b827a49-427e-4721-b05e-b151a8af524e')]",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/0b827a49-427e-4721-b05e-b151a8af524e')]",
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules",
      "kind": "Scheduled",
      "apiVersion": "2022-11-01",
      "properties": {
        "displayName": "Scheduled Task Creation or Update from User Writable Directory",
        "description": "'This query triggers when a scheduled task is created or updated and it is going to run programs from writable user paths.\nRef: https://blog.menasec.net/2019/03/threat-hunting-25-scheduled-tasks-for.html'\n",
        "enabled": true,
        "query": "// Enter a reference list for writable user paths\"\nlet WritableUserPaths = dynamic ([\"\\\"C:\\\\Users\\\\\",\"\\\"C:\\\\ProgramData\\\\\"]);\nSecurityEvent\n| where EventID in (4698,4702) and EventData has_any (WritableUserPaths)\n| parse EventData with * 'Command&gt;' Command \"&lt\" *\n| parse EventData with * 'Arguments&gt;' Arguments \"&lt\" *\n| where Command has_any (WritableUserPaths) or Arguments has_any (WritableUserPaths)\n| parse EventData with * 'SubjectUserName\">' SubjectUserName \"<\" * 'SubjectDomainName\">' SubjectDomainName \"<\" * 'TaskName\">' TaskName \"<\" *\n| summarize StartTime = min(TimeGenerated), EndTime = max(TimeGenerated) by Activity, Computer, SubjectUserName, SubjectDomainName, TaskName, Command, Arguments\n",
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "Execution"
        ],
        "techniques": [
          "T1053.005"
        ],
        "alertRuleTemplateName": "0b827a49-427e-4721-b05e-b151a8af524e",
        "customDetails": null,
        "entityMappings": [
          {
            "fieldMappings": [
              {
                "identifier": "FullName",
                "columnName": "SubjectUserName"
              }
            ],
            "entityType": "Account"
          },
          {
            "fieldMappings": [
              {
                "identifier": "FullName",
                "columnName": "Computer"
              }
            ],
            "entityType": "Host"
          },
          {
            "fieldMappings": [
              {
                "identifier": "CommandLine",
                "columnName": "CommandLine"
              }
            ],
            "entityType": "Process"
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Endpoint Threat Protection Essentials/Hunting Queries/ScheduledTaskCreationUpdateFromUserWritableDrectory.yaml",
        "templateVersion": "1.0.0"
      }
    }
  ]
}