Internet Access Microsoft Defender for IoT

Back


Id	9ff3b13b-287a-4ed0-8f6b-7e7b66cbbcbd
Rulename	Internet Access (Microsoft Defender for IoT)
Description	This alert leverages Defender for IoT to detect an OT device communicating with Internet which is possibly an indication of improper configuration of an application or malicious activity on the network.
Severity	High
Tactics	LateralMovement
Techniques	T0886
Required data connectors	IoT
Kind	Scheduled
Query frequency	5m
Query period	5m
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/IoTOTThreatMonitoringwithDefenderforIoT/Analytic Rules/IoTInternetAccess.yaml
Version	1.0.3
Arm template	9ff3b13b-287a-4ed0-8f6b-7e7b66cbbcbd.json

KQL

SecurityAlert
| where ProviderName == "IoTSecurity"
| where AlertName has "Internet"
| extend ExtendedProperties = parse_json(ExtendedProperties)
| where tostring(ExtendedProperties.isNew) == "True"
| extend DeviceId = tostring(ExtendedProperties.DeviceId), 
         SourceDeviceAddress = tostring(ExtendedProperties.SourceDeviceAddress), 
         DestDeviceAddress = tostring(ExtendedProperties.DestinationDeviceAddress), 
         RemediationSteps = tostring(parse_json(RemediationSteps)[0]), 
         Protocol = tostring(ExtendedProperties.Protocol), 
         AlertManagementUri = tostring(ExtendedProperties.AlertManagementUri)
| project
  TimeGenerated,
  DeviceId,
  ProductName,
  ProductComponentName,
  AlertSeverity,
  AlertName,
  Description,
  Protocol,
  SourceDeviceAddress,
  DestDeviceAddress,
  RemediationSteps,
  Tactics,
  Entities,
  VendorOriginalId,
  AlertLink,
  AlertManagementUri,
  Techniques

YAML

name: Internet Access (Microsoft Defender for IoT)
relevantTechniques:
- T0886
eventGroupingSettings:
  aggregationKind: AlertPerResult
requiredDataConnectors:
- dataTypes:
  - SecurityAlert (ASC for IoT)
  connectorId: IoT
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/IoTOTThreatMonitoringwithDefenderforIoT/Analytic Rules/IoTInternetAccess.yaml
query: |
  SecurityAlert
  | where ProviderName == "IoTSecurity"
  | where AlertName has "Internet"
  | extend ExtendedProperties = parse_json(ExtendedProperties)
  | where tostring(ExtendedProperties.isNew) == "True"
  | extend DeviceId = tostring(ExtendedProperties.DeviceId), 
           SourceDeviceAddress = tostring(ExtendedProperties.SourceDeviceAddress), 
           DestDeviceAddress = tostring(ExtendedProperties.DestinationDeviceAddress), 
           RemediationSteps = tostring(parse_json(RemediationSteps)[0]), 
           Protocol = tostring(ExtendedProperties.Protocol), 
           AlertManagementUri = tostring(ExtendedProperties.AlertManagementUri)
  | project
    TimeGenerated,
    DeviceId,
    ProductName,
    ProductComponentName,
    AlertSeverity,
    AlertName,
    Description,
    Protocol,
    SourceDeviceAddress,
    DestDeviceAddress,
    RemediationSteps,
    Tactics,
    Entities,
    VendorOriginalId,
    AlertLink,
    AlertManagementUri,
    Techniques  
tactics:
- LateralMovement
description: |
    'This alert leverages Defender for IoT to detect an OT device communicating with Internet which is possibly an indication of improper configuration of an application or malicious activity on the network.'
entityMappings: 
queryFrequency: 5m
alertDetailsOverride:
  alertDisplayNameFormat: (MDIoT) {{AlertName}}
  alertDescriptionFormat: (MDIoT) {{Description}}
  alertDynamicProperties:
  - alertProperty: ProductName
    value: ProductName
  - alertProperty: RemediationSteps
    value: RemediationSteps
  - alertProperty: Techniques
    value: Techniques
  - alertProperty: ProductComponentName
    value: ProductComponentName
  - alertProperty: AlertLink
    value: AlertLink
  alertTacticsColumnName: Tactics
  alertSeverityColumnName: AlertSeverity
triggerOperator: gt
version: 1.0.3
queryPeriod: 5m
sentinelEntitiesMappings:
- columnName: Entities
status: Available
kind: Scheduled
severity: High
triggerThreshold: 0
id: 9ff3b13b-287a-4ed0-8f6b-7e7b66cbbcbd
customDetails:
  AlertManagementUri: AlertManagementUri
  Protocol: Protocol
  VendorOriginalId: VendorOriginalId
  Sensor: DeviceId

ARM

{
  "$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/9ff3b13b-287a-4ed0-8f6b-7e7b66cbbcbd')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/9ff3b13b-287a-4ed0-8f6b-7e7b66cbbcbd')]",
      "properties": {
        "alertDetailsOverride": {
          "alertDescriptionFormat": "(MDIoT) {{Description}}",
          "alertDisplayNameFormat": "(MDIoT) {{AlertName}}",
          "alertDynamicProperties": [
            {
              "alertProperty": "ProductName",
              "value": "ProductName"
            },
            {
              "alertProperty": "RemediationSteps",
              "value": "RemediationSteps"
            },
            {
              "alertProperty": "Techniques",
              "value": "Techniques"
            },
            {
              "alertProperty": "ProductComponentName",
              "value": "ProductComponentName"
            },
            {
              "alertProperty": "AlertLink",
              "value": "AlertLink"
            }
          ],
          "alertSeverityColumnName": "AlertSeverity",
          "alertTacticsColumnName": "Tactics"
        },
        "alertRuleTemplateName": "9ff3b13b-287a-4ed0-8f6b-7e7b66cbbcbd",
        "customDetails": {
          "AlertManagementUri": "AlertManagementUri",
          "Protocol": "Protocol",
          "Sensor": "DeviceId",
          "VendorOriginalId": "VendorOriginalId"
        },
        "description": "'This alert leverages Defender for IoT to detect an OT device communicating with Internet which is possibly an indication of improper configuration of an application or malicious activity on the network.'\n",
        "displayName": "Internet Access (Microsoft Defender for IoT)",
        "enabled": true,
        "entityMappings": null,
        "eventGroupingSettings": {
          "aggregationKind": "AlertPerResult"
        },
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/IoTOTThreatMonitoringwithDefenderforIoT/Analytic Rules/IoTInternetAccess.yaml",
        "query": "SecurityAlert\n| where ProviderName == \"IoTSecurity\"\n| where AlertName has \"Internet\"\n| extend ExtendedProperties = parse_json(ExtendedProperties)\n| where tostring(ExtendedProperties.isNew) == \"True\"\n| extend DeviceId = tostring(ExtendedProperties.DeviceId), \n         SourceDeviceAddress = tostring(ExtendedProperties.SourceDeviceAddress), \n         DestDeviceAddress = tostring(ExtendedProperties.DestinationDeviceAddress), \n         RemediationSteps = tostring(parse_json(RemediationSteps)[0]), \n         Protocol = tostring(ExtendedProperties.Protocol), \n         AlertManagementUri = tostring(ExtendedProperties.AlertManagementUri)\n| project\n  TimeGenerated,\n  DeviceId,\n  ProductName,\n  ProductComponentName,\n  AlertSeverity,\n  AlertName,\n  Description,\n  Protocol,\n  SourceDeviceAddress,\n  DestDeviceAddress,\n  RemediationSteps,\n  Tactics,\n  Entities,\n  VendorOriginalId,\n  AlertLink,\n  AlertManagementUri,\n  Techniques\n",
        "queryFrequency": "PT5M",
        "queryPeriod": "PT5M",
        "sentinelEntitiesMappings": [
          {
            "columnName": "Entities"
          }
        ],
        "severity": "High",
        "status": "Available",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "LateralMovement"
        ],
        "techniques": null,
        "templateVersion": "1.0.3",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}