Unauthorized remote access to the network Microsoft Defender for IoT

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Id	1ff4fa3d-150b-4c87-b733-26c289af0d49
Rulename	Unauthorized remote access to the network (Microsoft Defender for IoT)
Description	This alert leverages Defender for IoT to detect unauthorized remote access to network devices, if another device on the network is compromised, target devices can be accessed remotely, increasing the attack surface.
Severity	Medium
Tactics	InitialAccess
Techniques	T0886
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/IoTUnauthorizedRemoteAccess.yaml
Version	1.0.2
Arm template	1ff4fa3d-150b-4c87-b733-26c289af0d49.json

KQL

SecurityAlert
| where ProviderName == "IoTSecurity"
| where AlertName == "Unauthorized SSH Access"
| 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

kind: Scheduled
relevantTechniques:
- T0886
description: |
    'This alert leverages Defender for IoT to detect unauthorized remote access to network devices, if another device on the network is compromised, target devices can be accessed remotely, increasing the attack surface.'
queryPeriod: 1h
queryFrequency: 1h
alertDetailsOverride:
  alertTacticsColumnName: Tactics
  alertDynamicProperties:
  - value: ProductName
    alertProperty: ProductName
  - value: RemediationSteps
    alertProperty: RemediationSteps
  - value: Techniques
    alertProperty: Techniques
  - value: ProductComponentName
    alertProperty: ProductComponentName
  - value: AlertLink
    alertProperty: AlertLink
  alertDisplayNameFormat: (MDIoT) {{AlertName}}
  alertDescriptionFormat: (MDIoT) {{Description}}
  alertSeverityColumnName: AlertSeverity
tactics:
- InitialAccess
name: Unauthorized remote access to the network (Microsoft Defender for IoT)
requiredDataConnectors:
- connectorId: IoT
  dataTypes:
  - SecurityAlert (ASC for IoT)
customDetails:
  Protocol: Protocol
  VendorOriginalId: VendorOriginalId
  Sensor: DeviceId
  AlertManagementUri: AlertManagementUri
entityMappings:
- entityType: IP
  fieldMappings:
  - identifier: Address
    columnName: SourceDeviceAddress
- entityType: IP
  fieldMappings:
  - identifier: Address
    columnName: DestDeviceAddress
triggerThreshold: 0
version: 1.0.2
id: 1ff4fa3d-150b-4c87-b733-26c289af0d49
query: |
  SecurityAlert
  | where ProviderName == "IoTSecurity"
  | where AlertName == "Unauthorized SSH Access"
  | 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  
status: Available
eventGroupingSettings:
  aggregationKind: AlertPerResult
triggerOperator: gt
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/IoTOTThreatMonitoringwithDefenderforIoT/Analytic Rules/IoTUnauthorizedRemoteAccess.yaml
severity: Medium

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/1ff4fa3d-150b-4c87-b733-26c289af0d49')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/1ff4fa3d-150b-4c87-b733-26c289af0d49')]",
      "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": "1ff4fa3d-150b-4c87-b733-26c289af0d49",
        "customDetails": {
          "AlertManagementUri": "AlertManagementUri",
          "Protocol": "Protocol",
          "Sensor": "DeviceId",
          "VendorOriginalId": "VendorOriginalId"
        },
        "description": "'This alert leverages Defender for IoT to detect unauthorized remote access to network devices, if another device on the network is compromised, target devices can be accessed remotely, increasing the attack surface.'\n",
        "displayName": "Unauthorized remote access to the network (Microsoft Defender for IoT)",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "columnName": "SourceDeviceAddress",
                "identifier": "Address"
              }
            ]
          },
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "columnName": "DestDeviceAddress",
                "identifier": "Address"
              }
            ]
          }
        ],
        "eventGroupingSettings": {
          "aggregationKind": "AlertPerResult"
        },
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/IoTOTThreatMonitoringwithDefenderforIoT/Analytic Rules/IoTUnauthorizedRemoteAccess.yaml",
        "query": "SecurityAlert\n| where ProviderName == \"IoTSecurity\"\n| where AlertName == \"Unauthorized SSH Access\"\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",
        "severity": "Medium",
        "status": "Available",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "InitialAccess"
        ],
        "techniques": null,
        "templateVersion": "1.0.2",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}