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

suppressionEnabled: false
relevantTechniques:
- T1562.007
entityMappings:
- fieldMappings:
  - columnName: accountName
    identifier: Name
  - columnName: upnSuffix
    identifier: UPNSuffix
  entityType: Account
incidentConfiguration:
  groupingConfiguration:
    groupByCustomDetails: []
    reopenClosedIncident: false
    enabled: false
    matchingMethod: AllEntities
    groupByEntities: []
    lookbackDuration: PT1H
    groupByAlertDetails: []
  createIncident: true
version: 1.0.1
suppressionDuration: 5h
id: e3368079-a2c0-4f1c-9fb7-287e907393ef
description: A Conditional Access Device platforms condition has changed (the Device platforms condition can be spoofed) in Entra ID.
requiredDataConnectors:
- connectorId: AzureActiveDirectory
  dataTypes:
  - AuditLogs
triggerThreshold: 0
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
eventGroupingSettings:
  aggregationKind: AlertPerResult
triggerOperator: gt
queryFrequency: 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  
severity: Low
queryPeriod: 5m
name: Conditional Access - A Conditional Access Device platforms condition has changed (the Device platforms condition can be spoofed)
tactics:
- DefenseEvasion
kind: Scheduled

ARM