BIO 12.02.01

Word Trust VBA Project Access Uitgeschakeld

📅 2025-10-30
•
⏱️ 5 minuten lezen
•
🔴 Must-Have

💼 Management Samenvatting

VBA Project Object Model access moet uitgeschakeld zijn om te voorkomen dat macros andere macro code kunnen modificeren (self-modifying malware).

Aanbeveling
IMPLEMENT
Risico zonder
High
Risk Score
7/10
Implementatie
1u (tech: 0.5u)
Van toepassing op:
✓ Word

VBA PROJECT ACCESS is MALWARE CAPABILITY: staat toe macros to: Modify other macro code (stealth), Inject malicious code in other documents, Maak aan self-replicating worms, Schakel uit Beveiligingsinstellingen programmatically. ATTACK: Macro virus spreads door VBA project modification. Schakel uit PREVENTS: Code injectie aanvallen attacks, Self-modifying malware, Macro propagation.

PowerShell Modules Vereist
Primary API: Intune / Group Policy
Connection: Registry
Required Modules:

Implementatie

Schakel uit VBA project access: Registry policy. EFFECT: Macros kan niet access VBA Object Model.

Vereisten

Word

Implementatie

Intune: Word Macro beveiliging → Trust VBA Project Access is Disabled

Monitoring

Gebruik PowerShell-script trust-vba-project-access-disabled.ps1 (functie Invoke-Monitoring) – Controleren.

Verifieer disabled

Compliance en Auditing

  1. DISA STIG
  2. BIO 12.02

Remediatie

Gebruik PowerShell-script trust-vba-project-access-disabled.ps1 (functie Invoke-Remediation) – Herstellen.

Compliance & Frameworks

Automation

Gebruik het onderstaande PowerShell script om deze security control te monitoren en te implementeren. Het script bevat functies voor zowel monitoring (-Monitoring) als remediation (-Remediation).

PowerShell
<# .SYNOPSIS Schakelt VBA Project toegang uit in Word .DESCRIPTION CIS O365-WD-000018 .NOTES Registry: HKCU:\Software\Policies\Microsoft\Office\16.0\WORD\Security, trustvbaprojectaccessdisabled = 1 #> #Requires -Version 5.1 param([switch]$Monitoring, [switch]$Remediation, [switch]$Revert, [switch]$WhatIf) $RegistryPath = "HKCU:\Software\Policies\Microsoft\Office\16.0\WORD\Security"; $ValueName = "trustvbaprojectaccessdisabled"; $ExpectedValue = 1; $ControlID = "O365-WD-000018" function Test-Compliance { try { if (-not(Test-Path $RegistryPath)) { return $false }; $c = Get-ItemProperty -Path $RegistryPath -Name $ValueName -ErrorAction SilentlyContinue; return($c -and $c.$ValueName -eq $ExpectedValue) }catch { return $false } } function Invoke-Monitoring { Write-Host "Monitoring ${ControlID}" -ForegroundColor Green; try { if (-not(Test-Path $RegistryPath)) { Write-Host "✗ Non-compliant" -ForegroundColor Red; return $false }; $c = Get-ItemProperty -Path $RegistryPath -Name $ValueName -ErrorAction SilentlyContinue; if ($c -and $c.$ValueName -eq $ExpectedValue) { Write-Host "✓ Compliant" -ForegroundColor Green; return $true }else { Write-Host "✗ Non-compliant" -ForegroundColor Red; return $false } }catch { Write-Host "✗ Fout" -ForegroundColor Red; return $false } } function Invoke-Remediation { Write-Host "Remediating ${ControlID}" -ForegroundColor Yellow; try { if ($WhatIf) { Write-Host "WhatIf" -ForegroundColor Cyan; return $true }; if (-not(Test-Path $RegistryPath)) { New-Item -Path $RegistryPath -Force | Out-Null }; Set-ItemProperty -Path $RegistryPath -Name $ValueName -Value $ExpectedValue -Type DWord -Force; Write-Host "✓ Ingesteld" -ForegroundColor Green; Start-Sleep -Seconds 1; return Invoke-Monitoring }catch { Write-Host "✗ Fout" -ForegroundColor Red; return $false } } function Invoke-Revert { Write-Host "Reverting ${ControlID}" -ForegroundColor Yellow; try { if ($WhatIf) { Write-Host "WhatIf" -ForegroundColor Cyan; return $true }; if (Test-Path $RegistryPath) { Remove-ItemProperty -Path $RegistryPath -Name $ValueName -ErrorAction SilentlyContinue; Write-Host "✓ Verwijderd" -ForegroundColor Green }; return $true }catch { Write-Host "✗ Fout" -ForegroundColor Red; return $false } } try { if ($Monitoring) { exit $(if (Invoke-Monitoring) { 0 }else { 1 }) }elseif ($Remediation) { exit $(if (Invoke-Remediation) { 0 }else { 1 }) }elseif ($Revert) { exit $(if (Invoke-Revert) { 0 }else { 1 }) }else { Write-Host "Gebruik: .\trust-vba-project-access-disabled.ps1 [-Monitoring] [-Remediation] [-Revert] [-WhatIf]" -ForegroundColor Yellow } }catch { Write-Host "✗ Fout" -ForegroundColor Red; exit 1 }

Risico zonder implementatie

Risico zonder implementatie
High: Hoog risico: VBA access is self-modifying malware, macro worms.

Management Samenvatting

Schakel uit VBA project access. voorkomt Code injectie aanvallen. Implementatie: 30-60 min.