Ensure 'Prevent bypassing of Microsoft Defender SmartScreen warnings about downloads' is set to 'Enabled'

AltaNivel 1Automatizadaedge

Descripción

This policy setting controls whether users may override Microsoft Defender SmartScreen warnings regarding downloads that are unverified. The recommended state for this setting is: Enabled. Rationale: Smartscreen checks downloads and verifies whether they are deemed safe or not. Only allowing verified downloads greatly reduces risk of a download containing a virus, spyware, or other unwanted software. Audit reads the Group Policy registry value and prints 'compliant', 'unset' (policy not configured, reported as FAIL) or the non-compliant value. Registry value: HKLM\SOFTWARE\Policies\Microsoft\Edge:PreventSmartScreenPromptOverrideForFiles (REG_DWORD); compliant when it is 1. Remediation writes 1 locally; in a domain set it through the ADMX so Group Policy does not revert it.

Cómo se verifica

Método de auditoría: Registro de Windows

registry

$v = (Get-ItemProperty -Path 'Registry::HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Edge' -Name 'PreventSmartScreenPromptOverrideForFiles' -ErrorAction SilentlyContinue).'PreventSmartScreenPromptOverrideForFiles'; if ($null -eq $v) { 'unset' } elseif (($null -ne $v -and @(1) -contains [int64]$v)) { 'compliant' } else { "non-compliant: $v" }

Salida esperada: compliant

Cómo se corrige

Método de corrección: Comando de shell

shell

$p = 'Registry::HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Edge'; if (-not (Test-Path -Path $p)) { New-Item -Path $p -Force | Out-Null }; New-ItemProperty -Path $p -Name 'PreventSmartScreenPromptOverrideForFiles' -Value 1 -PropertyType DWord -Force | Out-Null

Propiedades

Sistemas operativos: Cualquiera
Etiquetas: edgebrowsercis-l1
Referencia: CIS Microsoft Edge Benchmark v5.0.0 - 1.34.6 Ensure 'Prevent bypassing of Microsoft Defender SmartScreen warnings about downloads' 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 edge