Conditional Access - A Conditional Access Device platforms condition has changed the Device platforms condition can be spoofed

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Id	e3368079-a2c0-4f1c-9fb7-287e907393ef
Rulename	Conditional Access - A Conditional Access Device platforms condition has changed (the Device platforms condition can be spoofed)
Description	A Conditional Access Device platforms condition has changed (the Device platforms condition can be spoofed) in Entra ID.
Severity	Low
Tactics	DefenseEvasion
Techniques	T1562.007
Required data connectors	AzureActiveDirectory
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/Microsoft Entra ID/Analytic Rules/Conditional Access - A Conditional Access Device platforms condition has changed (the Device platforms condition can be spoofed).yaml
Version	1.0.1
Arm template	e3368079-a2c0-4f1c-9fb7-287e907393ef.json

KQL

// A Conditional Access Device platforms condition has changed (the Device platforms condition can be spoofed).
AuditLogs
| where OperationName in ("Update conditional access policy")
| extend excludePlatformsOld = extractjson("$.conditions.platforms.excludePlatforms", tostring(TargetResources[0].modifiedProperties[0].oldValue))
| extend excludePlatformsNew = extractjson("$.conditions.platforms.excludePlatforms", tostring(TargetResources[0].modifiedProperties[0].newValue))
| where excludePlatformsOld != excludePlatformsNew
| extend modifiedBy = tostring(InitiatedBy.user.userPrincipalName)
| extend accountName = tostring(split(modifiedBy, "@")[0])
| extend upnSuffix = tostring(split(modifiedBy, "@")[1])
| project
    TimeGenerated,
    OperationName,
    policy = TargetResources[0].displayName,
    modifiedBy,
    accountName,
    upnSuffix,
    result = Result,
    excludePlatformsOld,
    excludePlatformsNew
| order by TimeGenerated desc

YAML

relevantTechniques:
- T1562.007
entityMappings:
- entityType: Account
  fieldMappings:
  - columnName: accountName
    identifier: Name
  - columnName: upnSuffix
    identifier: UPNSuffix
eventGroupingSettings:
  aggregationKind: AlertPerResult
version: 1.0.1
suppressionDuration: 5h
id: e3368079-a2c0-4f1c-9fb7-287e907393ef
suppressionEnabled: false
severity: Low
kind: Scheduled
queryFrequency: 5m
description: A Conditional Access Device platforms condition has changed (the Device platforms condition can be spoofed) in Entra ID.
requiredDataConnectors:
- connectorId: AzureActiveDirectory
  dataTypes:
  - AuditLogs
triggerOperator: gt
name: Conditional Access - A Conditional Access Device platforms condition has changed (the Device platforms condition can be spoofed)
tactics:
- DefenseEvasion
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Microsoft Entra ID/Analytic Rules/Conditional Access - A Conditional Access Device platforms condition has changed (the Device platforms condition can be spoofed).yaml
triggerThreshold: 0
queryPeriod: 5m
query: |
  // A Conditional Access Device platforms condition has changed (the Device platforms condition can be spoofed).
  AuditLogs
  | where OperationName in ("Update conditional access policy")
  | extend excludePlatformsOld = extractjson("$.conditions.platforms.excludePlatforms", tostring(TargetResources[0].modifiedProperties[0].oldValue))
  | extend excludePlatformsNew = extractjson("$.conditions.platforms.excludePlatforms", tostring(TargetResources[0].modifiedProperties[0].newValue))
  | where excludePlatformsOld != excludePlatformsNew
  | extend modifiedBy = tostring(InitiatedBy.user.userPrincipalName)
  | extend accountName = tostring(split(modifiedBy, "@")[0])
  | extend upnSuffix = tostring(split(modifiedBy, "@")[1])
  | project
      TimeGenerated,
      OperationName,
      policy = TargetResources[0].displayName,
      modifiedBy,
      accountName,
      upnSuffix,
      result = Result,
      excludePlatformsOld,
      excludePlatformsNew
  | order by TimeGenerated desc  
incidentConfiguration:
  createIncident: true
  groupingConfiguration:
    matchingMethod: AllEntities
    groupByEntities: []
    groupByCustomDetails: []
    groupByAlertDetails: []
    reopenClosedIncident: false
    enabled: false
    lookbackDuration: PT1H

ARM