Azure Active Directory Hybrid Health AD FS Suspicious Application

// Azure AD Connect Health Agent - cf6d7e68-f018-4e0a-a7b3-126e053fb88d
// Azure Active Directory 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 contains 'AdFederationService'
| where OperationNameValue in~ (operationNamesList)
| extend claimsJson = parse_json(Claims)
| extend AppId = tostring(claimsJson.appid)
| extend AccountName = tostring(claimsJson.name)
| where AppId !in (appList)
| project-away claimsJson
| extend timestamp = TimeGenerated, AccountCustomEntity = Caller, IPCustomEntity = CallerIpAddress

queryFrequency: 1d
triggerOperator: gt
tactics:
- CredentialAccess
- DefenseEvasion
description: |
  'This detection uses AzureActivity logs (Administrative category) to a suspicious application adding a server instance to an Azure AD Hybrid health AD FS service or deleting the AD FS service instance.
  Usually the Azure AD Connect Health Agent application with ID cf6d7e68-f018-4e0a-a7b3-126e053fb88d and ID cb1056e2-e479-49de-ae31-7812af012ed8 is used to perform those operations.'  
status: Available
relevantTechniques:
- T1528
- T1550
name: Azure Active Directory Hybrid Health AD FS Suspicious Application
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Azure Activity/Analytic Rules/AADHybridHealthADFSSuspApp.yaml
severity: Medium
triggerThreshold: 0
version: 2.0.0
entityMappings:
- entityType: Account
  fieldMappings:
  - identifier: FullName
    columnName: AccountCustomEntity
- entityType: IP
  fieldMappings:
  - identifier: Address
    columnName: IPCustomEntity
tags:
- SimuLand
id: d9938c3b-16f9-444d-bc22-ea9a9110e0fd
requiredDataConnectors:
- connectorId: AzureActivity
  dataTypes:
  - AzureActivity
kind: Scheduled
query: |
  // Azure AD Connect Health Agent - cf6d7e68-f018-4e0a-a7b3-126e053fb88d
  // Azure Active Directory 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 contains 'AdFederationService'
  | where OperationNameValue in~ (operationNamesList)
  | extend claimsJson = parse_json(Claims)
  | extend AppId = tostring(claimsJson.appid)
  | extend AccountName = tostring(claimsJson.name)
  | where AppId !in (appList)
  | project-away claimsJson
  | extend timestamp = TimeGenerated, AccountCustomEntity = Caller, IPCustomEntity = CallerIpAddress  
queryPeriod: 1d

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "workspace": {
      "type": "String"
    }
  },
  "resources": [
    {
      "id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/d9938c3b-16f9-444d-bc22-ea9a9110e0fd')]",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/d9938c3b-16f9-444d-bc22-ea9a9110e0fd')]",
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules",
      "kind": "Scheduled",
      "apiVersion": "2022-11-01",
      "properties": {
        "displayName": "Azure Active Directory Hybrid Health AD FS Suspicious Application",
        "description": "'This detection uses AzureActivity logs (Administrative category) to a suspicious application adding a server instance to an Azure AD Hybrid health AD FS service or deleting the AD FS service instance.\nUsually the Azure AD 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",
        "severity": "Medium",
        "enabled": true,
        "query": "// Azure AD Connect Health Agent - cf6d7e68-f018-4e0a-a7b3-126e053fb88d\n// Azure Active Directory 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 contains 'AdFederationService'\n| where OperationNameValue in~ (operationNamesList)\n| extend claimsJson = parse_json(Claims)\n| extend AppId = tostring(claimsJson.appid)\n| extend AccountName = tostring(claimsJson.name)\n| where AppId !in (appList)\n| project-away claimsJson\n| extend timestamp = TimeGenerated, AccountCustomEntity = Caller, IPCustomEntity = CallerIpAddress\n",
        "queryFrequency": "P1D",
        "queryPeriod": "P1D",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0,
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "CredentialAccess",
          "DefenseEvasion"
        ],
        "techniques": [
          "T1528",
          "T1550"
        ],
        "alertRuleTemplateName": "d9938c3b-16f9-444d-bc22-ea9a9110e0fd",
        "customDetails": null,
        "entityMappings": [
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "identifier": "FullName",
                "columnName": "AccountCustomEntity"
              }
            ]
          },
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "identifier": "Address",
                "columnName": "IPCustomEntity"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Azure Activity/Analytic Rules/AADHybridHealthADFSSuspApp.yaml",
        "status": "Available",
        "tags": [
          "SimuLand"
        ],
        "templateVersion": "2.0.0"
      }
    }
  ]
}