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	1.0.3
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-expand TargetResource = TargetResources
//| where tostring(TargetResource["displayName"]) == "Microsoft Graph"
| mv-expand modifiedProperty = TargetResource["modifiedProperties"]
| where tostring(modifiedProperty["displayName"]) in ("AppRole.Value", "DelegatedPermissionGrant.Scope")
| extend PermissionGrant = trim(@'[\"\s]+', tostring(modifiedProperty["newValue"]))
| where PermissionGrant has "RoleManagement.ReadWrite.Directory"
| mv-apply modifiedProperty = TargetResource["modifiedProperties"] on (
    summarize modifiedProperties = make_bag(
        pack(tostring(modifiedProperty["displayName"]),
            pack("oldValue", trim(@'[\"\s]+', tostring(modifiedProperty["oldValue"])),
                "newValue", trim(@'[\"\s]+', tostring(modifiedProperty["newValue"])))))
)
| extend
    //AppDisplayName for operation "Add delegated permission grant" will be in operation "Consent to application" (usually same CorrelationId)
    AppDisplayName = tostring(modifiedProperties["ServicePrincipal.DisplayName"]["newValue"]),
    AppServicePrincipalId = tostring(modifiedProperties["ServicePrincipal.ObjectID"]["newValue"]),
    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

YAML

tags:
- SimuLand
queryPeriod: 2h
version: 1.0.3
relevantTechniques:
- T1098.003
- T1078.004
queryFrequency: 2h
kind: Scheduled
name: Azure AD Role Management Permission Grant
id: 1ff56009-db01-4615-8211-d4fda21da02d
entityMappings:
- fieldMappings:
  - columnName: Initiator
    identifier: FullName
  entityType: Account
- fieldMappings:
  - columnName: AppDisplayName
    identifier: FullName
  entityType: Account
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Azure Active Directory/Analytic Rules/AzureADRoleManagementPermissionGrant.yaml
severity: High
query: |
  AuditLogs
  | where Category == "ApplicationManagement" and LoggedByService == "Core Directory" and OperationName in ("Add delegated permission grant", "Add app role assignment to service principal")
  | mv-expand TargetResource = TargetResources
  //| where tostring(TargetResource["displayName"]) == "Microsoft Graph"
  | mv-expand modifiedProperty = TargetResource["modifiedProperties"]
  | where tostring(modifiedProperty["displayName"]) in ("AppRole.Value", "DelegatedPermissionGrant.Scope")
  | extend PermissionGrant = trim(@'[\"\s]+', tostring(modifiedProperty["newValue"]))
  | where PermissionGrant has "RoleManagement.ReadWrite.Directory"
  | mv-apply modifiedProperty = TargetResource["modifiedProperties"] on (
      summarize modifiedProperties = make_bag(
          pack(tostring(modifiedProperty["displayName"]),
              pack("oldValue", trim(@'[\"\s]+', tostring(modifiedProperty["oldValue"])),
                  "newValue", trim(@'[\"\s]+', tostring(modifiedProperty["newValue"])))))
  )
  | extend
      //AppDisplayName for operation "Add delegated permission grant" will be in operation "Consent to application" (usually same CorrelationId)
      AppDisplayName = tostring(modifiedProperties["ServicePrincipal.DisplayName"]["newValue"]),
      AppServicePrincipalId = tostring(modifiedProperties["ServicePrincipal.ObjectID"]["newValue"]),
      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  
tactics:
- Persistence
- Impact
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'  
requiredDataConnectors:
- connectorId: AzureActiveDirectory
  dataTypes:
  - AuditLogs
status: Available
triggerThreshold: 0
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",
      "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-expand TargetResource = TargetResources\n//| where tostring(TargetResource[\"displayName\"]) == \"Microsoft Graph\"\n| mv-expand modifiedProperty = TargetResource[\"modifiedProperties\"]\n| where tostring(modifiedProperty[\"displayName\"]) in (\"AppRole.Value\", \"DelegatedPermissionGrant.Scope\")\n| extend PermissionGrant = trim(@'[\\\"\\s]+', tostring(modifiedProperty[\"newValue\"]))\n| where PermissionGrant has \"RoleManagement.ReadWrite.Directory\"\n| mv-apply modifiedProperty = TargetResource[\"modifiedProperties\"] on (\n    summarize modifiedProperties = make_bag(\n        pack(tostring(modifiedProperty[\"displayName\"]),\n            pack(\"oldValue\", trim(@'[\\\"\\s]+', tostring(modifiedProperty[\"oldValue\"])),\n                \"newValue\", trim(@'[\\\"\\s]+', tostring(modifiedProperty[\"newValue\"])))))\n)\n| extend\n    //AppDisplayName for operation \"Add delegated permission grant\" will be in operation \"Consent to application\" (usually same CorrelationId)\n    AppDisplayName = tostring(modifiedProperties[\"ServicePrincipal.DisplayName\"][\"newValue\"]),\n    AppServicePrincipalId = tostring(modifiedProperties[\"ServicePrincipal.ObjectID\"][\"newValue\"]),\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",
        "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": [
          {
            "fieldMappings": [
              {
                "identifier": "FullName",
                "columnName": "Initiator"
              }
            ],
            "entityType": "Account"
          },
          {
            "fieldMappings": [
              {
                "identifier": "FullName",
                "columnName": "AppDisplayName"
              }
            ],
            "entityType": "Account"
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Azure Active Directory/Analytic Rules/AzureADRoleManagementPermissionGrant.yaml",
        "templateVersion": "1.0.3",
        "status": "Available",
        "tags": [
          "SimuLand"
        ]
      }
    }
  ]
}