Microsoft Sentinel Analytic Rules
cloudbrothers.infoAzure Sentinel RepoToggle Dark/Light/Auto modeToggle Dark/Light/Auto modeToggle Dark/Light/Auto modeBack to homepage
  1. Microsoft Sentinel Analytics Rules
  2. /
  3. Analytic Rules
  4. /
  5. Admin promotion after Role Management Application Permission Grant

Admin promotion after Role Management Application Permission Grant

Back
Idf80d951a-eddc-4171-b9d0-d616bb83efdc
RulenameAdmin promotion after Role Management Application Permission Grant
DescriptionThis 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
SeverityHigh
TacticsPrivilegeEscalation
Persistence
TechniquesT1098.003
T1078.004
Required data connectorsAzureActiveDirectory
KindScheduled
Query frequency1h
Query period2h
Trigger threshold0
Trigger operatorgt
Source Urihttps://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Microsoft Entra ID/Analytic Rules/AdminPromoAfterRoleMgmtAppPermissionGrant.yaml
Version1.1.0
Arm templatef80d951a-eddc-4171-b9d0-d616bb83efdc.json
Deploy To Azure
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
| extend PermissionGrant_InitiatingUserPrincipalName = tostring(PermissionGrant_InitiatedBy.user.userPrincipalName)
| extend PermissionGrant_InitiatingAadUserId = tostring(PermissionGrant_InitiatedBy.user.id)
| extend PermissionGrant_InitiatingIpAddress = tostring(iff(isnotempty(PermissionGrant_InitiatedBy.user.ipAddress), PermissionGrant_InitiatedBy.user.ipAddress, PermissionGrant_InitiatedBy.app.ipAddress))
| extend PermissionGrant_InitiatingAccountName = tostring(split(PermissionGrant_InitiatingUserPrincipalName, "@")[0]), PermissionGrant_InitiatingAccountUPNSuffix = tostring(split(PermissionGrant_InitiatingUserPrincipalName, "@")[1])
| extend RoleAssignment_InitiatingUserPrincipalName = tostring(RoleAssignment_InitiatedBy.user.userPrincipalName)
| extend RoleAssignment_InitiatingAadUserId = tostring(RoleAssignment_InitiatedBy.user.id)
| extend RoleAssignment_InitiatingIpAddress = tostring(iff(isnotempty(RoleAssignment_InitiatedBy.user.ipAddress), RoleAssignment_InitiatedBy.user.ipAddress, RoleAssignment_InitiatedBy.app.ipAddress))
| extend RoleAssignment_InitiatingAccountName = tostring(split(RoleAssignment_InitiatingUserPrincipalName, "@")[0]),  RoleAssignment_InitiatingAccountUPNSuffix = tostring(split(RoleAssignment_InitiatingUserPrincipalName, "@")[1])

kind: Scheduled
requiredDataConnectors:
- dataTypes:
  - AuditLogs
  connectorId: AzureActiveDirectory
tags:
- SimuLand
relevantTechniques:
- T1098.003
- T1078.004
status: Available
tactics:
- PrivilegeEscalation
- Persistence
name: Admin promotion after Role Management Application Permission Grant
queryFrequency: 1h
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
  | extend PermissionGrant_InitiatingUserPrincipalName = tostring(PermissionGrant_InitiatedBy.user.userPrincipalName)
  | extend PermissionGrant_InitiatingAadUserId = tostring(PermissionGrant_InitiatedBy.user.id)
  | extend PermissionGrant_InitiatingIpAddress = tostring(iff(isnotempty(PermissionGrant_InitiatedBy.user.ipAddress), PermissionGrant_InitiatedBy.user.ipAddress, PermissionGrant_InitiatedBy.app.ipAddress))
  | extend PermissionGrant_InitiatingAccountName = tostring(split(PermissionGrant_InitiatingUserPrincipalName, "@")[0]), PermissionGrant_InitiatingAccountUPNSuffix = tostring(split(PermissionGrant_InitiatingUserPrincipalName, "@")[1])
  | extend RoleAssignment_InitiatingUserPrincipalName = tostring(RoleAssignment_InitiatedBy.user.userPrincipalName)
  | extend RoleAssignment_InitiatingAadUserId = tostring(RoleAssignment_InitiatedBy.user.id)
  | extend RoleAssignment_InitiatingIpAddress = tostring(iff(isnotempty(RoleAssignment_InitiatedBy.user.ipAddress), RoleAssignment_InitiatedBy.user.ipAddress, RoleAssignment_InitiatedBy.app.ipAddress))
  | extend RoleAssignment_InitiatingAccountName = tostring(split(RoleAssignment_InitiatingUserPrincipalName, "@")[0]),  RoleAssignment_InitiatingAccountUPNSuffix = tostring(split(RoleAssignment_InitiatingUserPrincipalName, "@")[1])  
id: f80d951a-eddc-4171-b9d0-d616bb83efdc
severity: High
queryPeriod: 2h
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Microsoft Entra ID/Analytic Rules/AdminPromoAfterRoleMgmtAppPermissionGrant.yaml
version: 1.1.0
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'  
triggerThreshold: 0
triggerOperator: gt
entityMappings:
- entityType: Account
  fieldMappings:
  - columnName: AppDisplayName
    identifier: Name
  - columnName: AppServicePrincipalId
    identifier: AadUserId
- entityType: Account
  fieldMappings:
  - columnName: Target
    identifier: FullName
  - columnName: TargetName
    identifier: Name
  - columnName: TargetUPNSuffix
    identifier: UPNSuffix
- entityType: Account
  fieldMappings:
  - columnName: PermissionGrant_InitiatingUserPrincipalName
    identifier: FullName
  - columnName: PermissionGrant_InitiatingAccountName
    identifier: Name
  - columnName: PermissionGrant_InitiatingAccountUPNSuffix
    identifier: UPNSuffix
- entityType: Account
  fieldMappings:
  - columnName: PermissionGrant_InitiatingAadUserId
    identifier: AadUserId
- entityType: Account
  fieldMappings:
  - columnName: RoleAssignment_InitiatingUserPrincipalName
    identifier: FullName
  - columnName: RoleAssignment_InitiatingAccountName
    identifier: Name
  - columnName: RoleAssignment_InitiatingAccountUPNSuffix
    identifier: UPNSuffix
- entityType: Account
  fieldMappings:
  - columnName: RoleAssignment_InitiatingAadUserId
    identifier: AadUserId