Denial of Service Microsoft Defender for IoT

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Id	e068187a-01f5-4737-bc13-25db4027b7ea
Rulename	Denial of Service (Microsoft Defender for IoT)
Description	This alert leverages Defender for IoT to detect attacks that would prevent the use or proper operation of a DCS system including Denial of Service events.
Severity	High
Tactics	InhibitResponseFunction
Techniques	T0814
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/IoTDenialofService.yaml
Version	1.0.3
Arm template	e068187a-01f5-4737-bc13-25db4027b7ea.json

KQL

SecurityAlert
| where ProviderName == "IoTSecurity"
| where AlertName == "Suspicion of Denial Of Service Attack"
| 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: Denial of Service (Microsoft Defender for IoT)
alertDetailsOverride:
  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
  alertSeverityColumnName: AlertSeverity
  alertDescriptionFormat: (MDIoT) {{Description}}
id: e068187a-01f5-4737-bc13-25db4027b7ea
description: |
    'This alert leverages Defender for IoT to detect attacks that would prevent the use or proper operation of a DCS system including Denial of Service events.'
triggerThreshold: 0
entityMappings: 
sentinelEntitiesMappings:
- columnName: Entities
triggerOperator: gt
query: |
  SecurityAlert
  | where ProviderName == "IoTSecurity"
  | where AlertName == "Suspicion of Denial Of Service Attack"
  | 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:
- InhibitResponseFunction
version: 1.0.3
kind: Scheduled
queryFrequency: 5m
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/IoTOTThreatMonitoringwithDefenderforIoT/Analytic Rules/IoTDenialofService.yaml
severity: High
queryPeriod: 5m
requiredDataConnectors:
- dataTypes:
  - SecurityAlert (ASC for IoT)
  connectorId: IoT
status: Available
customDetails:
  Protocol: Protocol
  Sensor: DeviceId
  VendorOriginalId: VendorOriginalId
  AlertManagementUri: AlertManagementUri
eventGroupingSettings:
  aggregationKind: AlertPerResult
relevantTechniques:
- T0814

ARM