Application ID URI Changed
| Id | 9fb2ee72-959f-4c2b-bc38-483affc539e4 |
| Rulename | Application ID URI Changed |
| Description | Detects changes to an Application ID URI. Monitor these changes to make sure that they were authorized. Ref: https://docs.microsoft.com/azure/active-directory/fundamentals/security-operations-applications#appid-uri-added-modified-or-removed |
| Severity | Medium |
| Tactics | Persistence PrivilegeEscalation |
| Techniques | T1078.004 |
| Required data connectors | AzureActiveDirectory |
| Kind | Scheduled |
| Query frequency | 1d |
| Query period | 1d |
| Trigger threshold | 0 |
| Trigger operator | gt |
| Source Uri | https://github.com/Azure/Azure-Sentinel/blob/master/Detections/AuditLogs/ApplicationIDURIChanged.yaml |
| Version | 1.1.1 |
| Arm template | 9fb2ee72-959f-4c2b-bc38-483affc539e4.json |
AuditLogs
| where Category == "ApplicationManagement"
| where OperationName has_any ("Update Application", "Update Service principal")
| where TargetResources has "AppIdentifierUri"
| extend InitiatingAppName = tostring(InitiatedBy.app.displayName)
| extend InitiatingAppServicePrincipalId = tostring(InitiatedBy.app.servicePrincipalId)
| extend InitiatingUserPrincipalName = tostring(InitiatedBy.user.userPrincipalName)
| extend InitiatingAadUserId = tostring(InitiatedBy.user.id)
| extend InitiatingIPAddress = tostring(InitiatedBy.user.ipAddress)
| extend mod_props = TargetResources[0].modifiedProperties
| extend TargetAppName = tostring(TargetResources[0].displayName)
| mv-expand mod_props
| where mod_props.displayName has "AppIdentifierUri"
| extend OldURI = tostring(mod_props.oldValue)
| extend NewURI = tostring(mod_props.newValue)
| extend UpdatedBy = iif(isnotempty(InitiatingAppName), InitiatingAppName, InitiatingUserPrincipalName)
| extend InitiatingAccountName = tostring(split(InitiatingUserPrincipalName, "@")[0]), InitiatingAccountUPNSuffix = tostring(split(InitiatingUserPrincipalName, "@")[1])
| project-reorder TimeGenerated, InitiatingAppName, InitiatingAppServicePrincipalId, InitiatingAadUserId, InitiatingUserPrincipalName, InitiatingIPAddress
relevantTechniques:
- T1078.004
name: Application ID URI Changed
requiredDataConnectors:
- dataTypes:
- AuditLogs
connectorId: AzureActiveDirectory
entityMappings:
- fieldMappings:
- identifier: FullName
columnName: InitiatingUserPrincipalName
- identifier: Name
columnName: InitiatingAccountName
- identifier: UPNSuffix
columnName: InitiatingAccountUPNSuffix
entityType: Account
- fieldMappings:
- identifier: AadUserId
columnName: InitiatingAadUserId
entityType: Account
- fieldMappings:
- identifier: Url
columnName: OldURI
entityType: URL
- fieldMappings:
- identifier: Url
columnName: NewURI
entityType: URL
- fieldMappings:
- identifier: Address
columnName: InitiatingIPAddress
entityType: IP
triggerThreshold: 0
id: 9fb2ee72-959f-4c2b-bc38-483affc539e4
tactics:
- Persistence
- PrivilegeEscalation
version: 1.1.1
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Detections/AuditLogs/ApplicationIDURIChanged.yaml
queryPeriod: 1d
kind: Scheduled
tags:
- AADSecOpsGuide
metadata:
categories:
domains:
- Security - Others
author:
name: Microsoft Security Research
support:
tier: Community
source:
kind: Community
queryFrequency: 1d
severity: Medium
description: |
'Detects changes to an Application ID URI.
Monitor these changes to make sure that they were authorized.
Ref: https://docs.microsoft.com/azure/active-directory/fundamentals/security-operations-applications#appid-uri-added-modified-or-removed'
query: |
AuditLogs
| where Category == "ApplicationManagement"
| where OperationName has_any ("Update Application", "Update Service principal")
| where TargetResources has "AppIdentifierUri"
| extend InitiatingAppName = tostring(InitiatedBy.app.displayName)
| extend InitiatingAppServicePrincipalId = tostring(InitiatedBy.app.servicePrincipalId)
| extend InitiatingUserPrincipalName = tostring(InitiatedBy.user.userPrincipalName)
| extend InitiatingAadUserId = tostring(InitiatedBy.user.id)
| extend InitiatingIPAddress = tostring(InitiatedBy.user.ipAddress)
| extend mod_props = TargetResources[0].modifiedProperties
| extend TargetAppName = tostring(TargetResources[0].displayName)
| mv-expand mod_props
| where mod_props.displayName has "AppIdentifierUri"
| extend OldURI = tostring(mod_props.oldValue)
| extend NewURI = tostring(mod_props.newValue)
| extend UpdatedBy = iif(isnotempty(InitiatingAppName), InitiatingAppName, InitiatingUserPrincipalName)
| extend InitiatingAccountName = tostring(split(InitiatingUserPrincipalName, "@")[0]), InitiatingAccountUPNSuffix = tostring(split(InitiatingUserPrincipalName, "@")[1])
| project-reorder TimeGenerated, InitiatingAppName, InitiatingAppServicePrincipalId, InitiatingAadUserId, InitiatingUserPrincipalName, InitiatingIPAddress
triggerOperator: gt
{
"$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/9fb2ee72-959f-4c2b-bc38-483affc539e4')]",
"kind": "Scheduled",
"name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/9fb2ee72-959f-4c2b-bc38-483affc539e4')]",
"properties": {
"alertRuleTemplateName": "9fb2ee72-959f-4c2b-bc38-483affc539e4",
"customDetails": null,
"description": "'Detects changes to an Application ID URI.\n Monitor these changes to make sure that they were authorized.\n Ref: https://docs.microsoft.com/azure/active-directory/fundamentals/security-operations-applications#appid-uri-added-modified-or-removed'\n",
"displayName": "Application ID URI Changed",
"enabled": true,
"entityMappings": [
{
"entityType": "Account",
"fieldMappings": [
{
"columnName": "InitiatingUserPrincipalName",
"identifier": "FullName"
},
{
"columnName": "InitiatingAccountName",
"identifier": "Name"
},
{
"columnName": "InitiatingAccountUPNSuffix",
"identifier": "UPNSuffix"
}
]
},
{
"entityType": "Account",
"fieldMappings": [
{
"columnName": "InitiatingAadUserId",
"identifier": "AadUserId"
}
]
},
{
"entityType": "URL",
"fieldMappings": [
{
"columnName": "OldURI",
"identifier": "Url"
}
]
},
{
"entityType": "URL",
"fieldMappings": [
{
"columnName": "NewURI",
"identifier": "Url"
}
]
},
{
"entityType": "IP",
"fieldMappings": [
{
"columnName": "InitiatingIPAddress",
"identifier": "Address"
}
]
}
],
"OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Detections/AuditLogs/ApplicationIDURIChanged.yaml",
"query": "AuditLogs\n | where Category == \"ApplicationManagement\"\n | where OperationName has_any (\"Update Application\", \"Update Service principal\")\n | where TargetResources has \"AppIdentifierUri\"\n | extend InitiatingAppName = tostring(InitiatedBy.app.displayName)\n | extend InitiatingAppServicePrincipalId = tostring(InitiatedBy.app.servicePrincipalId)\n | extend InitiatingUserPrincipalName = tostring(InitiatedBy.user.userPrincipalName)\n | extend InitiatingAadUserId = tostring(InitiatedBy.user.id)\n | extend InitiatingIPAddress = tostring(InitiatedBy.user.ipAddress)\n | extend mod_props = TargetResources[0].modifiedProperties\n | extend TargetAppName = tostring(TargetResources[0].displayName)\n | mv-expand mod_props\n | where mod_props.displayName has \"AppIdentifierUri\"\n | extend OldURI = tostring(mod_props.oldValue)\n | extend NewURI = tostring(mod_props.newValue)\n | extend UpdatedBy = iif(isnotempty(InitiatingAppName), InitiatingAppName, InitiatingUserPrincipalName)\n | extend InitiatingAccountName = tostring(split(InitiatingUserPrincipalName, \"@\")[0]), InitiatingAccountUPNSuffix = tostring(split(InitiatingUserPrincipalName, \"@\")[1])\n | project-reorder TimeGenerated, InitiatingAppName, InitiatingAppServicePrincipalId, InitiatingAadUserId, InitiatingUserPrincipalName, InitiatingIPAddress\n",
"queryFrequency": "P1D",
"queryPeriod": "P1D",
"severity": "Medium",
"subTechniques": [
"T1078.004"
],
"suppressionDuration": "PT1H",
"suppressionEnabled": false,
"tactics": [
"Persistence",
"PrivilegeEscalation"
],
"tags": [
"AADSecOpsGuide"
],
"techniques": [
"T1078"
],
"templateVersion": "1.1.1",
"triggerOperator": "GreaterThan",
"triggerThreshold": 0
},
"type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
}
]
}