Azure AD Role Management Permission Grant

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Id	1ff56009-db01-4615-8211-d4fda21da02d
Rulename	Azure AD Role Management Permission Grant
Description	Identifies when the Microsoft Graph RoleManagement.ReadWrite.Directory (Delegated or Application) permission is granted to a service principal. This permission allows an application to read and manage the role-based access control (RBAC) settings for your company’s directory. An adversary could use this permission to add an Azure AD object to an Admin directory role and escalate privileges. Ref : https://docs.microsoft.com/graph/permissions-reference#role-management-permissions Ref : https://docs.microsoft.com/graph/api/directoryrole-post-members?view=graph-rest-1.0&tabs=http
Severity	High
Tactics	Persistence Impact
Techniques	T1098.003 T1078.004
Required data connectors	AzureActiveDirectory
Kind	Scheduled
Query frequency	2h
Query period	2h
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Azure Active Directory/Analytic Rules/AzureADRoleManagementPermissionGrant.yaml
Version	1.0.4
Arm template	1ff56009-db01-4615-8211-d4fda21da02d.json

KQL

AuditLogs
| where Category =~ "ApplicationManagement" and LoggedByService =~ "Core Directory" and OperationName in~ ("Add delegated permission grant", "Add app role assignment to service principal")
| mv-apply TargetResource = TargetResources on 
  (
      where TargetResource.type =~ "ServicePrincipal" and array_length(TargetResource.modifiedProperties) > 0 and isnotnull(TargetResource.displayName)
      | extend props = TargetResource.modifiedProperties
  )
| mv-apply Property = props on 
  (
      where Property.displayName in~ ("AppRole.Value","DelegatedPermissionGrant.Scope")
      | extend DisplayName = tostring(Property.displayName), PermissionGrant = trim('"',tostring(Property.newValue))
  )
| where PermissionGrant has "RoleManagement.ReadWrite.Directory"
| mv-apply Property = props on 
  (
      where Property.displayName =~ "ServicePrincipal.DisplayName"
      | extend AppDisplayName = trim('"',tostring(Property.newValue))
  )
| mv-apply Property = props on 
  (
      where Property.displayName =~ "ServicePrincipal.ObjectID"
      | extend AppServicePrincipalId = trim('"',tostring(Property.newValue))
  )
| extend 
    Initiator = iif(isnotempty(InitiatedBy.app), tostring(InitiatedBy.app.displayName), tostring(InitiatedBy.user.userPrincipalName)),
    InitiatorId = iif(isnotempty(InitiatedBy.app), tostring(InitiatedBy.app.servicePrincipalId), tostring(InitiatedBy.user.id))
| project TimeGenerated, OperationName, Result, PermissionGrant, AppDisplayName, AppServicePrincipalId, Initiator, InitiatorId, InitiatedBy, TargetResources, AdditionalDetails, CorrelationId
| extend Name = tostring(split(Initiator,'@',0)[0]), UPNSuffix = tostring(split(Initiator,'@',1)[0])

YAML

kind: Scheduled
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Azure Active Directory/Analytic Rules/AzureADRoleManagementPermissionGrant.yaml
severity: High
tags:
- SimuLand
name: Azure AD Role Management Permission Grant
entityMappings:
- entityType: Account
  fieldMappings:
  - columnName: Name
    identifier: Name
  - columnName: UPNSuffix
    identifier: UPNSuffix
- entityType: Account
  fieldMappings:
  - columnName: AppDisplayName
    identifier: Name
relevantTechniques:
- T1098.003
- T1078.004
queryFrequency: 2h
triggerThreshold: 0
queryPeriod: 2h
description: |
  'Identifies when the Microsoft Graph RoleManagement.ReadWrite.Directory (Delegated or Application) permission is granted to a service principal.
  This permission allows an application to read and manage the role-based access control (RBAC) settings for your company's directory.
  An adversary could use this permission to add an Azure AD object to an Admin directory role and escalate privileges.
  Ref : https://docs.microsoft.com/graph/permissions-reference#role-management-permissions
  Ref : https://docs.microsoft.com/graph/api/directoryrole-post-members?view=graph-rest-1.0&tabs=http'  
id: 1ff56009-db01-4615-8211-d4fda21da02d
version: 1.0.4
tactics:
- Persistence
- Impact
query: |
  AuditLogs
  | where Category =~ "ApplicationManagement" and LoggedByService =~ "Core Directory" and OperationName in~ ("Add delegated permission grant", "Add app role assignment to service principal")
  | mv-apply TargetResource = TargetResources on 
    (
        where TargetResource.type =~ "ServicePrincipal" and array_length(TargetResource.modifiedProperties) > 0 and isnotnull(TargetResource.displayName)
        | extend props = TargetResource.modifiedProperties
    )
  | mv-apply Property = props on 
    (
        where Property.displayName in~ ("AppRole.Value","DelegatedPermissionGrant.Scope")
        | extend DisplayName = tostring(Property.displayName), PermissionGrant = trim('"',tostring(Property.newValue))
    )
  | where PermissionGrant has "RoleManagement.ReadWrite.Directory"
  | mv-apply Property = props on 
    (
        where Property.displayName =~ "ServicePrincipal.DisplayName"
        | extend AppDisplayName = trim('"',tostring(Property.newValue))
    )
  | mv-apply Property = props on 
    (
        where Property.displayName =~ "ServicePrincipal.ObjectID"
        | extend AppServicePrincipalId = trim('"',tostring(Property.newValue))
    )
  | extend 
      Initiator = iif(isnotempty(InitiatedBy.app), tostring(InitiatedBy.app.displayName), tostring(InitiatedBy.user.userPrincipalName)),
      InitiatorId = iif(isnotempty(InitiatedBy.app), tostring(InitiatedBy.app.servicePrincipalId), tostring(InitiatedBy.user.id))
  | project TimeGenerated, OperationName, Result, PermissionGrant, AppDisplayName, AppServicePrincipalId, Initiator, InitiatorId, InitiatedBy, TargetResources, AdditionalDetails, CorrelationId
  | extend Name = tostring(split(Initiator,'@',0)[0]), UPNSuffix = tostring(split(Initiator,'@',1)[0])  
status: Available
requiredDataConnectors:
- dataTypes:
  - AuditLogs
  connectorId: AzureActiveDirectory
triggerOperator: gt

ARM

{
  "$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/1ff56009-db01-4615-8211-d4fda21da02d')]",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/1ff56009-db01-4615-8211-d4fda21da02d')]",
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules",
      "kind": "Scheduled",
      "apiVersion": "2022-11-01-preview",
      "properties": {
        "displayName": "Azure AD Role Management Permission Grant",
        "description": "'Identifies when the Microsoft Graph RoleManagement.ReadWrite.Directory (Delegated or Application) permission is granted to a service principal.\nThis permission allows an application to read and manage the role-based access control (RBAC) settings for your company's directory.\nAn adversary could use this permission to add an Azure AD object to an Admin directory role and escalate privileges.\nRef : https://docs.microsoft.com/graph/permissions-reference#role-management-permissions\nRef : https://docs.microsoft.com/graph/api/directoryrole-post-members?view=graph-rest-1.0&tabs=http'\n",
        "severity": "High",
        "enabled": true,
        "query": "AuditLogs\n| where Category =~ \"ApplicationManagement\" and LoggedByService =~ \"Core Directory\" and OperationName in~ (\"Add delegated permission grant\", \"Add app role assignment to service principal\")\n| mv-apply TargetResource = TargetResources on \n  (\n      where TargetResource.type =~ \"ServicePrincipal\" and array_length(TargetResource.modifiedProperties) > 0 and isnotnull(TargetResource.displayName)\n      | extend props = TargetResource.modifiedProperties\n  )\n| mv-apply Property = props on \n  (\n      where Property.displayName in~ (\"AppRole.Value\",\"DelegatedPermissionGrant.Scope\")\n      | extend DisplayName = tostring(Property.displayName), PermissionGrant = trim('\"',tostring(Property.newValue))\n  )\n| where PermissionGrant has \"RoleManagement.ReadWrite.Directory\"\n| mv-apply Property = props on \n  (\n      where Property.displayName =~ \"ServicePrincipal.DisplayName\"\n      | extend AppDisplayName = trim('\"',tostring(Property.newValue))\n  )\n| mv-apply Property = props on \n  (\n      where Property.displayName =~ \"ServicePrincipal.ObjectID\"\n      | extend AppServicePrincipalId = trim('\"',tostring(Property.newValue))\n  )\n| extend \n    Initiator = iif(isnotempty(InitiatedBy.app), tostring(InitiatedBy.app.displayName), tostring(InitiatedBy.user.userPrincipalName)),\n    InitiatorId = iif(isnotempty(InitiatedBy.app), tostring(InitiatedBy.app.servicePrincipalId), tostring(InitiatedBy.user.id))\n| project TimeGenerated, OperationName, Result, PermissionGrant, AppDisplayName, AppServicePrincipalId, Initiator, InitiatorId, InitiatedBy, TargetResources, AdditionalDetails, CorrelationId\n| extend Name = tostring(split(Initiator,'@',0)[0]), UPNSuffix = tostring(split(Initiator,'@',1)[0])\n",
        "queryFrequency": "PT2H",
        "queryPeriod": "PT2H",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0,
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "Persistence",
          "Impact"
        ],
        "techniques": [
          "T1098.003",
          "T1078.004"
        ],
        "alertRuleTemplateName": "1ff56009-db01-4615-8211-d4fda21da02d",
        "customDetails": null,
        "entityMappings": [
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "identifier": "Name",
                "columnName": "Name"
              },
              {
                "identifier": "UPNSuffix",
                "columnName": "UPNSuffix"
              }
            ]
          },
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "identifier": "Name",
                "columnName": "AppDisplayName"
              }
            ]
          }
        ],
        "templateVersion": "1.0.4",
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Azure Active Directory/Analytic Rules/AzureADRoleManagementPermissionGrant.yaml",
        "status": "Available",
        "tags": [
          "SimuLand"
        ]
      }
    }
  ]
}