Microsoft Entra ID Hybrid Health AD FS Service Delete
Id | 86a036b2-3686-42eb-b417-909fc0867771 |
Rulename | Microsoft Entra ID Hybrid Health AD FS Service Delete |
Description | This detection uses AzureActivity logs (Administrative category) to identify the deletion of an Microsoft Entra ID Hybrid Health AD FS service instance in a tenant. A threat actor can create a new AD Health ADFS service and create a fake server to spoof AD FS signing logs. The health AD FS service can then be deleted after it is no longer needed via HTTP requests to Azure. More information is available in this blog https://o365blog.com/post/hybridhealthagent/ |
Severity | Medium |
Tactics | DefenseEvasion |
Techniques | T1578.003 |
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/AADHybridHealthADFSServiceDelete.yaml |
Version | 2.0.3 |
Arm template | 86a036b2-3686-42eb-b417-909fc0867771.json |
AzureActivity
| where CategoryValue =~ 'Administrative'
| where ResourceProviderValue =~ 'Microsoft.ADHybridHealthService'
| where _ResourceId has 'AdFederationService'
| where OperationNameValue =~ 'Microsoft.ADHybridHealthService/services/delete'
| 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])
| project-away claimsJson
tags:
- SimuLand
tactics:
- DefenseEvasion
triggerOperator: gt
description: |
'This detection uses AzureActivity logs (Administrative category) to identify the deletion of an Microsoft Entra ID Hybrid Health AD FS service instance in a tenant.
A threat actor can create a new AD Health ADFS service and create a fake server to spoof AD FS signing logs.
The health AD FS service can then be deleted after it is no longer needed via HTTP requests to Azure.
More information is available in this blog https://o365blog.com/post/hybridhealthagent/'
requiredDataConnectors:
- connectorId: AzureActivity
dataTypes:
- AzureActivity
relevantTechniques:
- T1578.003
version: 2.0.3
id: 86a036b2-3686-42eb-b417-909fc0867771
entityMappings:
- entityType: Account
fieldMappings:
- columnName: Caller
identifier: FullName
- columnName: Name
identifier: Name
- columnName: UPNSuffix
identifier: UPNSuffix
- entityType: IP
fieldMappings:
- columnName: CallerIpAddress
identifier: Address
kind: Scheduled
query: |
AzureActivity
| where CategoryValue =~ 'Administrative'
| where ResourceProviderValue =~ 'Microsoft.ADHybridHealthService'
| where _ResourceId has 'AdFederationService'
| where OperationNameValue =~ 'Microsoft.ADHybridHealthService/services/delete'
| 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])
| project-away claimsJson
status: Available
triggerThreshold: 0
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Azure Activity/Analytic Rules/AADHybridHealthADFSServiceDelete.yaml
queryFrequency: 1d
severity: Medium
name: Microsoft Entra ID Hybrid Health AD FS Service Delete
queryPeriod: 1d
{
"$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/86a036b2-3686-42eb-b417-909fc0867771')]",
"kind": "Scheduled",
"name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/86a036b2-3686-42eb-b417-909fc0867771')]",
"properties": {
"alertRuleTemplateName": "86a036b2-3686-42eb-b417-909fc0867771",
"customDetails": null,
"description": "'This detection uses AzureActivity logs (Administrative category) to identify the deletion of an Microsoft Entra ID Hybrid Health AD FS service instance in a tenant.\nA threat actor can create a new AD Health ADFS service and create a fake server to spoof AD FS signing logs.\nThe health AD FS service can then be deleted after it is no longer needed via HTTP requests to Azure.\nMore information is available in this blog https://o365blog.com/post/hybridhealthagent/'\n",
"displayName": "Microsoft Entra ID Hybrid Health AD FS Service Delete",
"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/AADHybridHealthADFSServiceDelete.yaml",
"query": "AzureActivity\n| where CategoryValue =~ 'Administrative'\n| where ResourceProviderValue =~ 'Microsoft.ADHybridHealthService'\n| where _ResourceId has 'AdFederationService'\n| where OperationNameValue =~ 'Microsoft.ADHybridHealthService/services/delete'\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| project-away claimsJson\n",
"queryFrequency": "P1D",
"queryPeriod": "P1D",
"severity": "Medium",
"status": "Available",
"subTechniques": [
"T1578.003"
],
"suppressionDuration": "PT1H",
"suppressionEnabled": false,
"tactics": [
"DefenseEvasion"
],
"tags": [
"SimuLand"
],
"techniques": [
"T1578"
],
"templateVersion": "2.0.3",
"triggerOperator": "GreaterThan",
"triggerThreshold": 0
},
"type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
}
]
}