Admin promotion after Role Management Application Permission Grant
Id | f80d951a-eddc-4171-b9d0-d616bb83efdc |
Rulename | Admin promotion after Role Management Application Permission Grant |
Description | This rule looks for a service principal being granted the Microsoft Graph RoleManagement.ReadWrite.Directory (application) permission before being used to add an Microsoft Entra ID object or user account to an Admin directory role (i.e. Global Administrators). This is a known attack path that is usually abused when a service principal already has the AppRoleAssignment.ReadWrite.All permission granted. This permission allows an app to manage permission grants for application permissions to any API. A service principal can promote itself or other service principals to admin roles (i.e. Global Administrators). This would be considered a privilege escalation technique. Ref : https://docs.microsoft.com/graph/permissions-reference#role-management-permissions, https://docs.microsoft.com/graph/api/directoryrole-post-members?view=graph-rest-1.0&tabs=http |
Severity | High |
Tactics | PrivilegeEscalation Persistence |
Techniques | T1098.003 T1078.004 |
Required data connectors | AzureActiveDirectory |
Kind | Scheduled |
Query frequency | 1h |
Query period | 2h |
Trigger threshold | 0 |
Trigger operator | gt |
Source Uri | https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Microsoft Entra ID/Analytic Rules/AdminPromoAfterRoleMgmtAppPermissionGrant.yaml |
Version | 1.0.4 |
Arm template | f80d951a-eddc-4171-b9d0-d616bb83efdc.json |
let query_frequency = 1h;
let query_period = 2h;
AuditLogs
| where TimeGenerated > ago(query_period)
| where Category =~ "ApplicationManagement" and LoggedByService =~ "Core Directory"
| where OperationName =~ "Add app role assignment to service principal"
| mv-expand TargetResource = TargetResources
| mv-expand modifiedProperty = TargetResource["modifiedProperties"]
| where tostring(modifiedProperty["displayName"]) == "AppRole.Value"
| extend PermissionGrant = tostring(modifiedProperty["newValue"])
| where PermissionGrant has "RoleManagement.ReadWrite.Directory"
| mv-apply modifiedProperty = TargetResource["modifiedProperties"] on (
summarize modifiedProperties = make_bag(
bag_pack(tostring(modifiedProperty["displayName"]),
bag_pack("oldValue", trim(@'[\"\s]+', tostring(modifiedProperty["oldValue"])),
"newValue", trim(@'[\"\s]+', tostring(modifiedProperty["newValue"])))), 100)
)
| project
PermissionGrant_TimeGenerated = TimeGenerated,
PermissionGrant_OperationName = OperationName,
PermissionGrant_Result = Result,
PermissionGrant,
AppDisplayName = tostring(modifiedProperties["ServicePrincipal.DisplayName"]["newValue"]),
AppServicePrincipalId = tostring(modifiedProperties["ServicePrincipal.ObjectID"]["newValue"]),
PermissionGrant_InitiatedBy = InitiatedBy,
PermissionGrant_TargetResources = TargetResources,
PermissionGrant_AdditionalDetails = AdditionalDetails,
PermissionGrant_CorrelationId = CorrelationId
| join kind=inner (
AuditLogs
| where TimeGenerated > ago(query_frequency)
| where Category =~ "RoleManagement" and LoggedByService =~ "Core Directory" and AADOperationType =~ "Assign"
| where isnotempty(InitiatedBy["app"])
| mv-expand TargetResource = TargetResources
| mv-expand modifiedProperty = TargetResource["modifiedProperties"]
| where tostring(modifiedProperty["displayName"]) in ("Role.DisplayName", "RoleDefinition.DisplayName")
| extend RoleAssignment = tostring(modifiedProperty["newValue"])
| where RoleAssignment contains "Admin"
| project
RoleAssignment_TimeGenerated = TimeGenerated,
RoleAssignment_OperationName = OperationName,
RoleAssignment_Result = Result,
RoleAssignment,
TargetType = tostring(TargetResources[0]["type"]),
Target = iff(isnotempty(TargetResources[0]["displayName"]), tostring(TargetResources[0]["displayName"]), tolower(TargetResources[0]["userPrincipalName"])),
TargetId = tostring(TargetResources[0]["id"]),
RoleAssignment_InitiatedBy = InitiatedBy,
RoleAssignment_TargetResources = TargetResources,
RoleAssignment_AdditionalDetails = AdditionalDetails,
RoleAssignment_CorrelationId = CorrelationId,
AppServicePrincipalId = tostring(InitiatedBy["app"]["servicePrincipalId"])
) on AppServicePrincipalId
| where PermissionGrant_TimeGenerated < RoleAssignment_TimeGenerated
| extend
TargetName = tostring(split(Target, "@")[0]),
TargetUPNSuffix = tostring(split(Target, "@")[1])
| project PermissionGrant_TimeGenerated, PermissionGrant_OperationName, PermissionGrant_Result, PermissionGrant, AppDisplayName, AppServicePrincipalId, PermissionGrant_InitiatedBy, PermissionGrant_TargetResources, PermissionGrant_AdditionalDetails, PermissionGrant_CorrelationId, RoleAssignment_TimeGenerated, RoleAssignment_OperationName, RoleAssignment_Result, RoleAssignment, TargetType, Target, TargetName, TargetUPNSuffix, TargetId, RoleAssignment_InitiatedBy, RoleAssignment_TargetResources, RoleAssignment_AdditionalDetails, RoleAssignment_CorrelationId
id: f80d951a-eddc-4171-b9d0-d616bb83efdc
queryPeriod: 2h
severity: High
kind: Scheduled
query: |
let query_frequency = 1h;
let query_period = 2h;
AuditLogs
| where TimeGenerated > ago(query_period)
| where Category =~ "ApplicationManagement" and LoggedByService =~ "Core Directory"
| where OperationName =~ "Add app role assignment to service principal"
| mv-expand TargetResource = TargetResources
| mv-expand modifiedProperty = TargetResource["modifiedProperties"]
| where tostring(modifiedProperty["displayName"]) == "AppRole.Value"
| extend PermissionGrant = tostring(modifiedProperty["newValue"])
| where PermissionGrant has "RoleManagement.ReadWrite.Directory"
| mv-apply modifiedProperty = TargetResource["modifiedProperties"] on (
summarize modifiedProperties = make_bag(
bag_pack(tostring(modifiedProperty["displayName"]),
bag_pack("oldValue", trim(@'[\"\s]+', tostring(modifiedProperty["oldValue"])),
"newValue", trim(@'[\"\s]+', tostring(modifiedProperty["newValue"])))), 100)
)
| project
PermissionGrant_TimeGenerated = TimeGenerated,
PermissionGrant_OperationName = OperationName,
PermissionGrant_Result = Result,
PermissionGrant,
AppDisplayName = tostring(modifiedProperties["ServicePrincipal.DisplayName"]["newValue"]),
AppServicePrincipalId = tostring(modifiedProperties["ServicePrincipal.ObjectID"]["newValue"]),
PermissionGrant_InitiatedBy = InitiatedBy,
PermissionGrant_TargetResources = TargetResources,
PermissionGrant_AdditionalDetails = AdditionalDetails,
PermissionGrant_CorrelationId = CorrelationId
| join kind=inner (
AuditLogs
| where TimeGenerated > ago(query_frequency)
| where Category =~ "RoleManagement" and LoggedByService =~ "Core Directory" and AADOperationType =~ "Assign"
| where isnotempty(InitiatedBy["app"])
| mv-expand TargetResource = TargetResources
| mv-expand modifiedProperty = TargetResource["modifiedProperties"]
| where tostring(modifiedProperty["displayName"]) in ("Role.DisplayName", "RoleDefinition.DisplayName")
| extend RoleAssignment = tostring(modifiedProperty["newValue"])
| where RoleAssignment contains "Admin"
| project
RoleAssignment_TimeGenerated = TimeGenerated,
RoleAssignment_OperationName = OperationName,
RoleAssignment_Result = Result,
RoleAssignment,
TargetType = tostring(TargetResources[0]["type"]),
Target = iff(isnotempty(TargetResources[0]["displayName"]), tostring(TargetResources[0]["displayName"]), tolower(TargetResources[0]["userPrincipalName"])),
TargetId = tostring(TargetResources[0]["id"]),
RoleAssignment_InitiatedBy = InitiatedBy,
RoleAssignment_TargetResources = TargetResources,
RoleAssignment_AdditionalDetails = AdditionalDetails,
RoleAssignment_CorrelationId = CorrelationId,
AppServicePrincipalId = tostring(InitiatedBy["app"]["servicePrincipalId"])
) on AppServicePrincipalId
| where PermissionGrant_TimeGenerated < RoleAssignment_TimeGenerated
| extend
TargetName = tostring(split(Target, "@")[0]),
TargetUPNSuffix = tostring(split(Target, "@")[1])
| project PermissionGrant_TimeGenerated, PermissionGrant_OperationName, PermissionGrant_Result, PermissionGrant, AppDisplayName, AppServicePrincipalId, PermissionGrant_InitiatedBy, PermissionGrant_TargetResources, PermissionGrant_AdditionalDetails, PermissionGrant_CorrelationId, RoleAssignment_TimeGenerated, RoleAssignment_OperationName, RoleAssignment_Result, RoleAssignment, TargetType, Target, TargetName, TargetUPNSuffix, TargetId, RoleAssignment_InitiatedBy, RoleAssignment_TargetResources, RoleAssignment_AdditionalDetails, RoleAssignment_CorrelationId
entityMappings:
- fieldMappings:
- identifier: Name
columnName: AppDisplayName
entityType: Account
- fieldMappings:
- identifier: Name
columnName: TargetName
- identifier: UPNSuffix
columnName: TargetUPNSuffix
entityType: Account
tags:
- SimuLand
triggerThreshold: 0
description: |
'This rule looks for a service principal being granted the Microsoft Graph RoleManagement.ReadWrite.Directory (application) permission before being used to add an Microsoft Entra ID object or user account to an Admin directory role (i.e. Global Administrators).
This is a known attack path that is usually abused when a service principal already has the AppRoleAssignment.ReadWrite.All permission granted. This permission allows an app to manage permission grants for application permissions to any API.
A service principal can promote itself or other service principals to admin roles (i.e. Global Administrators). This would be considered a privilege escalation technique.
Ref : https://docs.microsoft.com/graph/permissions-reference#role-management-permissions, https://docs.microsoft.com/graph/api/directoryrole-post-members?view=graph-rest-1.0&tabs=http'
status: Available
name: Admin promotion after Role Management Application Permission Grant
relevantTechniques:
- T1098.003
- T1078.004
queryFrequency: 1h
requiredDataConnectors:
- connectorId: AzureActiveDirectory
dataTypes:
- AuditLogs
tactics:
- PrivilegeEscalation
- Persistence
triggerOperator: gt
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Microsoft Entra ID/Analytic Rules/AdminPromoAfterRoleMgmtAppPermissionGrant.yaml
version: 1.0.4
{
"$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
"contentVersion": "1.0.0.0",
"parameters": {
"workspace": {
"type": "String"
}
},
"resources": [
{
"apiVersion": "2023-02-01-preview",
"id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/f80d951a-eddc-4171-b9d0-d616bb83efdc')]",
"kind": "Scheduled",
"name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/f80d951a-eddc-4171-b9d0-d616bb83efdc')]",
"properties": {
"alertRuleTemplateName": "f80d951a-eddc-4171-b9d0-d616bb83efdc",
"customDetails": null,
"description": "'This rule looks for a service principal being granted the Microsoft Graph RoleManagement.ReadWrite.Directory (application) permission before being used to add an Microsoft Entra ID object or user account to an Admin directory role (i.e. Global Administrators).\nThis is a known attack path that is usually abused when a service principal already has the AppRoleAssignment.ReadWrite.All permission granted. This permission allows an app to manage permission grants for application permissions to any API.\nA service principal can promote itself or other service principals to admin roles (i.e. Global Administrators). This would be considered a privilege escalation technique.\nRef : https://docs.microsoft.com/graph/permissions-reference#role-management-permissions, https://docs.microsoft.com/graph/api/directoryrole-post-members?view=graph-rest-1.0&tabs=http'\n",
"displayName": "Admin promotion after Role Management Application Permission Grant",
"enabled": true,
"entityMappings": [
{
"entityType": "Account",
"fieldMappings": [
{
"columnName": "AppDisplayName",
"identifier": "Name"
}
]
},
{
"entityType": "Account",
"fieldMappings": [
{
"columnName": "TargetName",
"identifier": "Name"
},
{
"columnName": "TargetUPNSuffix",
"identifier": "UPNSuffix"
}
]
}
],
"OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Microsoft Entra ID/Analytic Rules/AdminPromoAfterRoleMgmtAppPermissionGrant.yaml",
"query": "let query_frequency = 1h;\nlet query_period = 2h;\nAuditLogs\n| where TimeGenerated > ago(query_period)\n| where Category =~ \"ApplicationManagement\" and LoggedByService =~ \"Core Directory\"\n| where OperationName =~ \"Add app role assignment to service principal\"\n| mv-expand TargetResource = TargetResources\n| mv-expand modifiedProperty = TargetResource[\"modifiedProperties\"]\n| where tostring(modifiedProperty[\"displayName\"]) == \"AppRole.Value\"\n| extend PermissionGrant = tostring(modifiedProperty[\"newValue\"])\n| where PermissionGrant has \"RoleManagement.ReadWrite.Directory\"\n| mv-apply modifiedProperty = TargetResource[\"modifiedProperties\"] on (\n summarize modifiedProperties = make_bag(\n bag_pack(tostring(modifiedProperty[\"displayName\"]),\n bag_pack(\"oldValue\", trim(@'[\\\"\\s]+', tostring(modifiedProperty[\"oldValue\"])),\n \"newValue\", trim(@'[\\\"\\s]+', tostring(modifiedProperty[\"newValue\"])))), 100)\n)\n| project\n PermissionGrant_TimeGenerated = TimeGenerated,\n PermissionGrant_OperationName = OperationName,\n PermissionGrant_Result = Result,\n PermissionGrant,\n AppDisplayName = tostring(modifiedProperties[\"ServicePrincipal.DisplayName\"][\"newValue\"]),\n AppServicePrincipalId = tostring(modifiedProperties[\"ServicePrincipal.ObjectID\"][\"newValue\"]),\n PermissionGrant_InitiatedBy = InitiatedBy,\n PermissionGrant_TargetResources = TargetResources,\n PermissionGrant_AdditionalDetails = AdditionalDetails,\n PermissionGrant_CorrelationId = CorrelationId\n| join kind=inner (\n AuditLogs\n | where TimeGenerated > ago(query_frequency)\n | where Category =~ \"RoleManagement\" and LoggedByService =~ \"Core Directory\" and AADOperationType =~ \"Assign\"\n | where isnotempty(InitiatedBy[\"app\"])\n | mv-expand TargetResource = TargetResources\n | mv-expand modifiedProperty = TargetResource[\"modifiedProperties\"]\n | where tostring(modifiedProperty[\"displayName\"]) in (\"Role.DisplayName\", \"RoleDefinition.DisplayName\")\n | extend RoleAssignment = tostring(modifiedProperty[\"newValue\"])\n | where RoleAssignment contains \"Admin\"\n | project\n RoleAssignment_TimeGenerated = TimeGenerated,\n RoleAssignment_OperationName = OperationName,\n RoleAssignment_Result = Result,\n RoleAssignment,\n TargetType = tostring(TargetResources[0][\"type\"]),\n Target = iff(isnotempty(TargetResources[0][\"displayName\"]), tostring(TargetResources[0][\"displayName\"]), tolower(TargetResources[0][\"userPrincipalName\"])),\n TargetId = tostring(TargetResources[0][\"id\"]),\n RoleAssignment_InitiatedBy = InitiatedBy,\n RoleAssignment_TargetResources = TargetResources,\n RoleAssignment_AdditionalDetails = AdditionalDetails,\n RoleAssignment_CorrelationId = CorrelationId,\n AppServicePrincipalId = tostring(InitiatedBy[\"app\"][\"servicePrincipalId\"])\n ) on AppServicePrincipalId\n| where PermissionGrant_TimeGenerated < RoleAssignment_TimeGenerated\n| extend\n TargetName = tostring(split(Target, \"@\")[0]),\n TargetUPNSuffix = tostring(split(Target, \"@\")[1])\n| project PermissionGrant_TimeGenerated, PermissionGrant_OperationName, PermissionGrant_Result, PermissionGrant, AppDisplayName, AppServicePrincipalId, PermissionGrant_InitiatedBy, PermissionGrant_TargetResources, PermissionGrant_AdditionalDetails, PermissionGrant_CorrelationId, RoleAssignment_TimeGenerated, RoleAssignment_OperationName, RoleAssignment_Result, RoleAssignment, TargetType, Target, TargetName, TargetUPNSuffix, TargetId, RoleAssignment_InitiatedBy, RoleAssignment_TargetResources, RoleAssignment_AdditionalDetails, RoleAssignment_CorrelationId\n",
"queryFrequency": "PT1H",
"queryPeriod": "PT2H",
"severity": "High",
"status": "Available",
"suppressionDuration": "PT1H",
"suppressionEnabled": false,
"tactics": [
"Persistence",
"PrivilegeEscalation"
],
"tags": [
"SimuLand"
],
"techniques": [
"T1078",
"T1098"
],
"templateVersion": "1.0.4",
"triggerOperator": "GreaterThan",
"triggerThreshold": 0
},
"type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
}
]
}