PLC unsecure key state Microsoft Defender for IoT
Id | f9df500a-e2a4-4104-a517-dc1d85bb654f |
Rulename | PLC unsecure key state (Microsoft Defender for IoT) |
Description | This alert leverages Defender for IoT to detect PLC operating mode changes indicating the PLC is potentially insecure. If the PLC is compromised, devices that interact with it may be impacted. This may affect overall system security and safety. |
Severity | Low |
Tactics | Execution |
Techniques | T0858 |
Required data connectors | IoT |
Kind | Scheduled |
Query frequency | 3h |
Query period | 3h |
Trigger threshold | 0 |
Trigger operator | gt |
Source Uri | https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/IoTOTThreatMonitoringwithDefenderforIoT/Analytic Rules/IoTInsecurePLC.yaml |
Version | 1.0.3 |
Arm template | f9df500a-e2a4-4104-a517-dc1d85bb654f.json |
SecurityAlert
| where ProviderName == "IoTSecurity"
| where AlertName has "PLC Operating Mode Changed"
| 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
AlertManagementUri: AlertManagementUri
VendorOriginalId: VendorOriginalId
Sensor: DeviceId
status: Available
id: f9df500a-e2a4-4104-a517-dc1d85bb654f
alertDetailsOverride:
alertDescriptionFormat: (MDIoT) {{Description}}
alertDynamicProperties:
- alertProperty: ProductName
value: ProductName
- alertProperty: RemediationSteps
value: RemediationSteps
- alertProperty: Techniques
value: Techniques
- alertProperty: ProductComponentName
value: ProductComponentName
- alertProperty: AlertLink
value: AlertLink
alertDisplayNameFormat: (MDIoT) {{AlertName}}
alertTacticsColumnName: Tactics
alertSeverityColumnName: AlertSeverity
query: |
SecurityAlert
| where ProviderName == "IoTSecurity"
| where AlertName has "PLC Operating Mode Changed"
| 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
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/IoTOTThreatMonitoringwithDefenderforIoT/Analytic Rules/IoTInsecurePLC.yaml
description: |
'This alert leverages Defender for IoT to detect PLC operating mode changes indicating the PLC is potentially insecure. If the PLC is compromised, devices that interact with it may be impacted. This may affect overall system security and safety.'
name: PLC unsecure key state (Microsoft Defender for IoT)
relevantTechniques:
- T0858
entityMappings:
triggerThreshold: 0
severity: Low
requiredDataConnectors:
- dataTypes:
- SecurityAlert (ASC for IoT)
connectorId: IoT
eventGroupingSettings:
aggregationKind: AlertPerResult
sentinelEntitiesMappings:
- columnName: Entities
queryFrequency: 3h
queryPeriod: 3h
version: 1.0.3
kind: Scheduled
tactics:
- Execution
triggerOperator: gt
{
"$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/f9df500a-e2a4-4104-a517-dc1d85bb654f')]",
"kind": "Scheduled",
"name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/f9df500a-e2a4-4104-a517-dc1d85bb654f')]",
"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": "f9df500a-e2a4-4104-a517-dc1d85bb654f",
"customDetails": {
"AlertManagementUri": "AlertManagementUri",
"Protocol": "Protocol",
"Sensor": "DeviceId",
"VendorOriginalId": "VendorOriginalId"
},
"description": "'This alert leverages Defender for IoT to detect PLC operating mode changes indicating the PLC is potentially insecure. If the PLC is compromised, devices that interact with it may be impacted. This may affect overall system security and safety.'\n",
"displayName": "PLC unsecure key state (Microsoft Defender for IoT)",
"enabled": true,
"entityMappings": null,
"eventGroupingSettings": {
"aggregationKind": "AlertPerResult"
},
"OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/IoTOTThreatMonitoringwithDefenderforIoT/Analytic Rules/IoTInsecurePLC.yaml",
"query": "SecurityAlert\n| where ProviderName == \"IoTSecurity\"\n| where AlertName has \"PLC Operating Mode Changed\"\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": "PT3H",
"queryPeriod": "PT3H",
"sentinelEntitiesMappings": [
{
"columnName": "Entities"
}
],
"severity": "Low",
"status": "Available",
"subTechniques": [],
"suppressionDuration": "PT1H",
"suppressionEnabled": false,
"tactics": [
"Execution"
],
"techniques": null,
"templateVersion": "1.0.3",
"triggerOperator": "GreaterThan",
"triggerThreshold": 0
},
"type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
}
]
}