Unauthorized DHCP configuration in the network Microsoft Defender for IoT

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Id	c52ec521-9188-4a9e-a4cd-34a3dfbc3d27
Rulename	Unauthorized DHCP configuration in the network (Microsoft Defender for IoT)
Description	This alert leverages Defender for IoT to detect an unauthorized DHCP configuration indicating a possible unauthorized device configuration.
Severity	Medium
Tactics	Discovery
Techniques	T0842
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/IoTUnauthorizedNetworkConfiguration.yaml
Version	1.0.3
Arm template	c52ec521-9188-4a9e-a4cd-34a3dfbc3d27.json

KQL

SecurityAlert
| where ProviderName == "IoTSecurity"
| where AlertName == "Device Failed to Receive a Dynamic IP Address"
| 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: Unauthorized DHCP configuration in the network (Microsoft Defender for IoT)
relevantTechniques:
- T0842
id: c52ec521-9188-4a9e-a4cd-34a3dfbc3d27
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/IoTOTThreatMonitoringwithDefenderforIoT/Analytic Rules/IoTUnauthorizedNetworkConfiguration.yaml
requiredDataConnectors:
- dataTypes:
  - SecurityAlert (ASC for IoT)
  connectorId: IoT
eventGroupingSettings:
  aggregationKind: AlertPerResult
version: 1.0.3
severity: Medium
triggerThreshold: 0
queryPeriod: 1h
entityMappings: 
kind: Scheduled
alertDetailsOverride:
  alertSeverityColumnName: AlertSeverity
  alertDynamicProperties:
  - value: ProductName
    alertProperty: ProductName
  - value: RemediationSteps
    alertProperty: RemediationSteps
  - value: Techniques
    alertProperty: Techniques
  - value: ProductComponentName
    alertProperty: ProductComponentName
  - value: AlertLink
    alertProperty: AlertLink
  alertDisplayNameFormat: (MDIoT) {{AlertName}}
  alertTacticsColumnName: Tactics
  alertDescriptionFormat: (MDIoT) {{Description}}
queryFrequency: 1h
status: Available
query: |
  SecurityAlert
  | where ProviderName == "IoTSecurity"
  | where AlertName == "Device Failed to Receive a Dynamic IP Address"
  | 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:
- Discovery
sentinelEntitiesMappings:
- columnName: Entities
customDetails:
  VendorOriginalId: VendorOriginalId
  Sensor: DeviceId
  Protocol: Protocol
  AlertManagementUri: AlertManagementUri
description: |
    'This alert leverages Defender for IoT to detect an unauthorized DHCP configuration indicating a possible unauthorized device configuration.'
triggerOperator: gt

ARM