💼 Management Samenvatting
Deze security regelen waarborgt de correcte configuratie van beveiligingsinstellingen op Windows endpoints.
Aanbeveling
IMPLEMENT
Risico zonder
High
Risk Score
7/10
Implementatie
2u (tech: 1u)
Van toepassing op:
✓ Windows
Deze instelling is onderdeel van de Windows security baseline en beschermt tegen bekende aanvalsvectoren door het afdwingen van veilige configuraties.
PowerShell Modules Vereist
Primary API: Graph
Connection:
Required Modules: Microsoft.Graph.DeviceManagement
Connection:
Connect-MgGraphRequired Modules: Microsoft.Graph.DeviceManagement
Implementatie
Dit regelen configureert guest access reviews via Microsoft Intune apparaat configuratie beleid of compliance policies om Windows endpoints te beveiligen volgens security best practices.
Vereisten
m365
Implementatie
Gebruik PowerShell-script guest-access-reviews.ps1 (functie Invoke-Monitoring) – Monitoren.
monitoring
Gebruik PowerShell-script guest-access-reviews.ps1 (functie Invoke-Monitoring) – Controleren.
Remediatie
Gebruik PowerShell-script guest-access-reviews.ps1 (functie Invoke-Remediation) – Herstellen.
Compliance en Auditing
Beleid documentatie
Compliance & Frameworks
- CIS M365: Control 18.9.19.2 (L1) - CIS Security Benchmark aanbevelingen
- BIO: 16.01 - BIO Baseline Informatiebeveiliging Overheid - 16.01 - Gebeurtenissen logging en audittrails
- ISO 27001:2022: A.12.4.1 - ISO 27001:2022 - Gebeurtenissen logging en audittrails
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
Guest Access Reviews
.DESCRIPTION
Ensures guest access reviews are configured (quarterly review recommended)
.NOTES
NL Baseline v2.0
Requires: Azure AD Premium P2
#>
#Requires -Version 5.1
#Requires -Modules Microsoft.Graph
[CmdletBinding()]
param([switch]$Monitoring)
$ErrorActionPreference = 'Stop'
Write-Host "`n========================================" -ForegroundColor Cyan
Write-Host "Guest Access Reviews" -ForegroundColor Cyan
Write-Host "========================================`n" -ForegroundColor Cyan
function Invoke-Monitoring {
try {
Connect-MgGraph -Scopes "AccessReview.Read.All" -ErrorAction Stop -NoWelcome
try {
$accessReviews = Invoke-MgGraphRequest -Method GET `
-Uri "https://graph.microsoft.com/v1.0/identityGovernance/accessReviews/definitions" -ErrorAction Stop
$guestReviews = $accessReviews.value | Where-Object {
$_.scope.query -match 'guest' -or $_.displayName -match 'guest'
}
Write-Host " Total Access Reviews: $($accessReviews.value.Count)" -ForegroundColor Cyan
Write-Host " Guest-specific Reviews: $($guestReviews.Count)" -ForegroundColor $(if ($guestReviews.Count -gt 0) { 'Green' }else { 'Yellow' })
if ($guestReviews.Count -gt 0) {
foreach ($review in $guestReviews) {
Write-Host "`n [OK] $($review.displayName)" -ForegroundColor Green
Write-Host " Recurrence: $($review.recurrence.pattern.type)" -ForegroundColor Cyan
}
}
Write-Host "`n ⚠️ Requires Azure AD Premium P2" -ForegroundColor Yellow
Write-Host " Recommendation: Quarterly guest access reviews" -ForegroundColor Gray
if ($guestReviews.Count -gt 0) {
Write-Host "`n[OK] COMPLIANT" -ForegroundColor Green
exit 0
}
else {
Write-Host "`n⚠️ RECOMMENDED: Configure guest reviews" -ForegroundColor Yellow
exit 1
}
}
catch {
Write-Host " ⚠️ Access Reviews not available (requires Premium P2)" -ForegroundColor Yellow
exit 0
}
}
catch {
Write-Host "ERROR: $_" -ForegroundColor Red
Write-Host "Configure in: Azure AD > Identity Governance > Access reviews" -ForegroundColor Yellow
exit 2
}
}
try {
if ($Monitoring) { Invoke-Monitoring }
else { Write-Host "Use: -Monitoring" -ForegroundColor Yellow }
}
catch { throw }
finally {
Write-Host "`n========================================`n" -ForegroundColor Cyan
}
function Invoke-Remediation {
<#
.SYNOPSIS
Herstelt de configuratie naar de gewenste staat
.DESCRIPTION
Dit is een monitoring-only control, remediation delegeert naar monitoring
#>
[CmdletBinding()]
param()
Write-Host "[INFO] Dit is een monitoring-only control" -ForegroundColor Yellow
Write-Host "[INFO] Running monitoring check..." -ForegroundColor Cyan
Invoke-Monitoring
}
Risico zonder implementatie
Risico zonder implementatie
High: No auth tracking.
Management Samenvatting
Schakel in audit logging.
- Implementatietijd: 2 uur
- FTE required: 0.01 FTE