No traffic on Sensor Detected (Microsoft Defender for IoT)

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Id	208c3f5b-3ba2-49b5-9bca-c44e58cd5fd3
Rulename	No traffic on Sensor Detected (Microsoft Defender for IoT)
Description	This alert leverages Defender for IoT to detect that a sensor can no longer detect the network traffic, which indicates that the system is potentially insecure.
Severity	High
Tactics	InhibitResponseFunction
Techniques	T0881
Required data connectors	IoT
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/IoTOTThreatMonitoringwithDefenderforIoT/Analytic Rules/IoTINoSensorTrafficDetected.yaml
Version	1.0.1
Arm template	208c3f5b-3ba2-49b5-9bca-c44e58cd5fd3.json

KQL

SecurityAlert
| where ProviderName == "IoTSecurity"
| where AlertName == "No Traffic Detected on Sensor Interface" 
| 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

severity: High
sentinelEntitiesMappings:
- columnName: Entities
eventGroupingSettings:
  aggregationKind: AlertPerResult
triggerThreshold: 0
query: |
  SecurityAlert
  | where ProviderName == "IoTSecurity"
  | where AlertName == "No Traffic Detected on Sensor Interface" 
  | 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  
customDetails:
  Protocol: Protocol
  Sensor: DeviceId
  AlertManagementUri: AlertManagementUri
  VendorOriginalId: VendorOriginalId
queryFrequency: 1h
requiredDataConnectors:
- connectorId: IoT
  dataTypes:
  - SecurityAlert (ASC for IoT)
id: 208c3f5b-3ba2-49b5-9bca-c44e58cd5fd3
version: 1.0.1
name: No traffic on Sensor Detected (Microsoft Defender for IoT)
kind: Scheduled
status: Available
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/IoTOTThreatMonitoringwithDefenderforIoT/Analytic Rules/IoTINoSensorTrafficDetected.yaml
queryPeriod: 1h
relevantTechniques:
- T0881
triggerOperator: gt
tactics:
- InhibitResponseFunction
alertDetailsOverride:
  alertSeverityColumnName: AlertSeverity
  alertDisplayNameFormat: (MDIoT) {{AlertName}}
  alertDynamicProperties:
  - alertProperty: ProductName
    value: ProductName
  - alertProperty: RemediationSteps
    value: RemediationSteps
  - alertProperty: Techniques
    value: Techniques
  - alertProperty: ProductComponentName
    value: ProductComponentName
  - alertProperty: AlertLink
    value: AlertLink
  alertTacticsColumnName: Tactics
  alertDescriptionFormat: (MDIoT) {{Description}}
description: |
    'This alert leverages Defender for IoT to detect that a sensor can no longer detect the network traffic, which indicates that the system is potentially insecure.'
entityMappings:

ARM

{
  "$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/208c3f5b-3ba2-49b5-9bca-c44e58cd5fd3')]",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/208c3f5b-3ba2-49b5-9bca-c44e58cd5fd3')]",
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules",
      "kind": "Scheduled",
      "apiVersion": "2022-11-01",
      "properties": {
        "displayName": "No traffic on Sensor Detected (Microsoft Defender for IoT)",
        "description": "'This alert leverages Defender for IoT to detect that a sensor can no longer detect the network traffic, which indicates that the system is potentially insecure.'\n",
        "severity": "High",
        "enabled": true,
        "query": "SecurityAlert\n| where ProviderName == \"IoTSecurity\"\n| where AlertName == \"No Traffic Detected on Sensor Interface\" \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": "PT1H",
        "queryPeriod": "PT1H",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0,
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "InhibitResponseFunction"
        ],
        "techniques": [
          "T0881"
        ],
        "alertRuleTemplateName": "208c3f5b-3ba2-49b5-9bca-c44e58cd5fd3",
        "eventGroupingSettings": {
          "aggregationKind": "AlertPerResult"
        },
        "alertDetailsOverride": {
          "alertDynamicProperties": [
            {
              "value": "ProductName",
              "alertProperty": "ProductName"
            },
            {
              "value": "RemediationSteps",
              "alertProperty": "RemediationSteps"
            },
            {
              "value": "Techniques",
              "alertProperty": "Techniques"
            },
            {
              "value": "ProductComponentName",
              "alertProperty": "ProductComponentName"
            },
            {
              "value": "AlertLink",
              "alertProperty": "AlertLink"
            }
          ],
          "alertSeverityColumnName": "AlertSeverity",
          "alertDescriptionFormat": "(MDIoT) {{Description}}",
          "alertTacticsColumnName": "Tactics",
          "alertDisplayNameFormat": "(MDIoT) {{AlertName}}"
        },
        "customDetails": {
          "Protocol": "Protocol",
          "Sensor": "DeviceId",
          "AlertManagementUri": "AlertManagementUri",
          "VendorOriginalId": "VendorOriginalId"
        },
        "entityMappings": null,
        "sentinelEntitiesMappings": [
          {
            "columnName": "Entities"
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/IoTOTThreatMonitoringwithDefenderforIoT/Analytic Rules/IoTINoSensorTrafficDetected.yaml",
        "templateVersion": "1.0.1",
        "status": "Available"
      }
    }
  ]
}