Microsoft Entra ID Hybrid Health AD FS Suspicious Application

Back


Id	d9938c3b-16f9-444d-bc22-ea9a9110e0fd
Rulename	Microsoft Entra ID Hybrid Health AD FS Suspicious Application
Description	This detection uses AzureActivity logs (Administrative category) to identify a suspicious application adding a server instance to an Microsoft Entra ID Hybrid Health AD FS service or deleting the AD FS service instance. Usually the Microsoft Entra ID Connect Health Agent application with ID cf6d7e68-f018-4e0a-a7b3-126e053fb88d and ID cb1056e2-e479-49de-ae31-7812af012ed8 is used to perform those operations.
Severity	Medium
Tactics	CredentialAccess DefenseEvasion
Techniques	T1528 T1550
Required data connectors	AzureActivity
Kind	Scheduled
Query frequency	1d
Query period	1d
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Azure Activity/Analytic Rules/AADHybridHealthADFSSuspApp.yaml
Version	2.0.3
Arm template	d9938c3b-16f9-444d-bc22-ea9a9110e0fd.json

KQL

// Microsoft Entra ID Connect Health Agent - cf6d7e68-f018-4e0a-a7b3-126e053fb88d
// Microsoft Entra ID Connect - cb1056e2-e479-49de-ae31-7812af012ed8
let appList = dynamic(['cf6d7e68-f018-4e0a-a7b3-126e053fb88d','cb1056e2-e479-49de-ae31-7812af012ed8']);
let operationNamesList = dynamic(['Microsoft.ADHybridHealthService/services/servicemembers/action','Microsoft.ADHybridHealthService/services/delete']);
AzureActivity
| where CategoryValue =~ 'Administrative'
| where ResourceProviderValue =~ 'Microsoft.ADHybridHealthService'
| where _ResourceId has 'AdFederationService'
| where OperationNameValue in~ (operationNamesList)
| extend claimsJson = parse_json(Claims)
| extend AppId = tostring(claimsJson.appid), AccountName = tostring(claimsJson.name), Name = tostring(split(Caller,'@',0)[0]), UPNSuffix = tostring(split(Caller,'@',1)[0])
| where AppId !in (appList)
| project-away claimsJson

YAML

description: |
  'This detection uses AzureActivity logs (Administrative category) to identify a suspicious application adding a server instance to an Microsoft Entra ID Hybrid Health AD FS service or deleting the AD FS service instance.
  Usually the Microsoft Entra ID Connect Health Agent application with ID cf6d7e68-f018-4e0a-a7b3-126e053fb88d and ID cb1056e2-e479-49de-ae31-7812af012ed8 is used to perform those operations.'  
version: 2.0.3
tactics:
- CredentialAccess
- DefenseEvasion
entityMappings:
- entityType: Account
  fieldMappings:
  - columnName: Caller
    identifier: FullName
  - columnName: Name
    identifier: Name
  - columnName: UPNSuffix
    identifier: UPNSuffix
- entityType: IP
  fieldMappings:
  - columnName: CallerIpAddress
    identifier: Address
queryFrequency: 1d
triggerThreshold: 0
query: |
  // Microsoft Entra ID Connect Health Agent - cf6d7e68-f018-4e0a-a7b3-126e053fb88d
  // Microsoft Entra ID Connect - cb1056e2-e479-49de-ae31-7812af012ed8
  let appList = dynamic(['cf6d7e68-f018-4e0a-a7b3-126e053fb88d','cb1056e2-e479-49de-ae31-7812af012ed8']);
  let operationNamesList = dynamic(['Microsoft.ADHybridHealthService/services/servicemembers/action','Microsoft.ADHybridHealthService/services/delete']);
  AzureActivity
  | where CategoryValue =~ 'Administrative'
  | where ResourceProviderValue =~ 'Microsoft.ADHybridHealthService'
  | where _ResourceId has 'AdFederationService'
  | where OperationNameValue in~ (operationNamesList)
  | extend claimsJson = parse_json(Claims)
  | extend AppId = tostring(claimsJson.appid), AccountName = tostring(claimsJson.name), Name = tostring(split(Caller,'@',0)[0]), UPNSuffix = tostring(split(Caller,'@',1)[0])
  | where AppId !in (appList)
  | project-away claimsJson  
tags:
- SimuLand
triggerOperator: gt
status: Available
relevantTechniques:
- T1528
- T1550
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Azure Activity/Analytic Rules/AADHybridHealthADFSSuspApp.yaml
queryPeriod: 1d
id: d9938c3b-16f9-444d-bc22-ea9a9110e0fd
name: Microsoft Entra ID Hybrid Health AD FS Suspicious Application
kind: Scheduled
requiredDataConnectors:
- connectorId: AzureActivity
  dataTypes:
  - AzureActivity
severity: Medium

ARM

{
  "$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/d9938c3b-16f9-444d-bc22-ea9a9110e0fd')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/d9938c3b-16f9-444d-bc22-ea9a9110e0fd')]",
      "properties": {
        "alertRuleTemplateName": "d9938c3b-16f9-444d-bc22-ea9a9110e0fd",
        "customDetails": null,
        "description": "'This detection uses AzureActivity logs (Administrative category) to identify a suspicious application adding a server instance to an Microsoft Entra ID Hybrid Health AD FS service or deleting the AD FS service instance.\nUsually the Microsoft Entra ID Connect Health Agent application with ID cf6d7e68-f018-4e0a-a7b3-126e053fb88d and ID cb1056e2-e479-49de-ae31-7812af012ed8 is used to perform those operations.'\n",
        "displayName": "Microsoft Entra ID Hybrid Health AD FS Suspicious Application",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "Caller",
                "identifier": "FullName"
              },
              {
                "columnName": "Name",
                "identifier": "Name"
              },
              {
                "columnName": "UPNSuffix",
                "identifier": "UPNSuffix"
              }
            ]
          },
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "columnName": "CallerIpAddress",
                "identifier": "Address"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Azure Activity/Analytic Rules/AADHybridHealthADFSSuspApp.yaml",
        "query": "// Microsoft Entra ID Connect Health Agent - cf6d7e68-f018-4e0a-a7b3-126e053fb88d\n// Microsoft Entra ID Connect - cb1056e2-e479-49de-ae31-7812af012ed8\nlet appList = dynamic(['cf6d7e68-f018-4e0a-a7b3-126e053fb88d','cb1056e2-e479-49de-ae31-7812af012ed8']);\nlet operationNamesList = dynamic(['Microsoft.ADHybridHealthService/services/servicemembers/action','Microsoft.ADHybridHealthService/services/delete']);\nAzureActivity\n| where CategoryValue =~ 'Administrative'\n| where ResourceProviderValue =~ 'Microsoft.ADHybridHealthService'\n| where _ResourceId has 'AdFederationService'\n| where OperationNameValue in~ (operationNamesList)\n| extend claimsJson = parse_json(Claims)\n| extend AppId = tostring(claimsJson.appid), AccountName = tostring(claimsJson.name), Name = tostring(split(Caller,'@',0)[0]), UPNSuffix = tostring(split(Caller,'@',1)[0])\n| where AppId !in (appList)\n| project-away claimsJson\n",
        "queryFrequency": "P1D",
        "queryPeriod": "P1D",
        "severity": "Medium",
        "status": "Available",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "CredentialAccess",
          "DefenseEvasion"
        ],
        "tags": [
          "SimuLand"
        ],
        "techniques": [
          "T1528",
          "T1550"
        ],
        "templateVersion": "2.0.3",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}