TMA-OFFICE-2.2.4.7.2.7

Ensure 'Disable Trust Bar Notification for unsigned application add-ins and block them' is set to 'Enabled'

AltaNivel 1Automatizadaoffice

Descripción

This policy setting controls whether the specified Office application notifies users when an unsigned add-in is loaded, or silently disables the add-in without notification. Note: This setting only applies if you enable the Require that application add-ins are signed by Trusted Publisher policy setting, which prevents users from changing this policy setting. The recommended state for this setting is: Enabled. Rationale: Allowing unsigned application add-ins could cause the application to load dangerous add-ins and as a result, malicious code could become active on user computers and the network. User setting: the audit checks HKEY_USERS\<SID>\SOFTWARE\Policies\Microsoft\office\16.0\excel\security:notbpromptunsignedaddin (REG_DWORD) in every loaded user hive (S-1-5-21-*) and is compliant when each holds 1. It prints 'no-user-hive-loaded' (FAIL) when no user profile is loaded, so scan while users are logged on.

Cómo se verifica

Método de auditoría: Registro de Windows

registry

$sids = @(Get-ChildItem -Path 'Registry::HKEY_USERS' -ErrorAction SilentlyContinue | Where-Object { $_.PSChildName -match '^S-1-5-21-\d+-\d+-\d+-\d+$' } | ForEach-Object { $_.PSChildName }); if ($sids.Count -eq 0) { 'no-user-hive-loaded' } else { $bad = @(); foreach ($s in $sids) { $v = (Get-ItemProperty -Path ('Registry::HKEY_USERS\' + $s + '\SOFTWARE\Policies\Microsoft\office\16.0\excel\security') -Name 'notbpromptunsignedaddin' -ErrorAction SilentlyContinue).'notbpromptunsignedaddin'; if (-not ($null -ne $v -and @(1) -contains [int64]$v)) { $bad += $s + ':notbpromptunsignedaddin=' + $v } }; if ($bad.Count -eq 0) { 'compliant' } else { 'non-compliant: ' + ($bad -join ', ') } }

Salida esperada: compliant

Cómo se corrige

Método de corrección: Guía o parche de infraestructura

Configure through Group Policy (User Configuration): User Configuration\Administrative Templates\Microsoft Excel 2016\Excel Options\Security\Trust Center\Disable Trust Bar Notification for unsigned application add-ins and block them = Enabled

Propiedades

Sistemas operativos: Cualquiera
Etiquetas: officeproductivitycis-l1
Referencia: CIS Microsoft Office Enterprise Benchmark v2.0.0 - 2.2.4.7.2.7 Ensure 'Disable Trust Bar Notification for unsigned application add-ins and block them' is set to 'Enabled'

Verificar este host

Ejecute esto en un equipo que tenga permiso para auditar. El escaneo es de solo lectura.

shell

tmaegis scan --target office