Ensure 'Excel 4 macrosheets and add-in files' is set to 'Enabled: Open/Save blocked, use open policy'

ÉlevéeNiveau 1Automatiséeoffice

Description

This policy setting determines whether users can open, view, edit, or save Excel files with Excel 4 macrosheets and add-in file format. Open/Save blocked, use open policy: Both opening and saving of the file type will be blocked. The file will open based on the policy setting configured in the "default file block behavior" key. The recommended state for this setting is: Enabled: Open/Save blocked, use open policy. Rationale: Using legacy file formats could allow malicious code to become active on a user's computer or the network. User setting: the audit checks HKEY_USERS\<SID>\SOFTWARE\Policies\Microsoft\office\16.0\excel\security\fileblock:xl4macros (REG_DWORD) in every loaded user hive (S-1-5-21-*) and is compliant when each holds 2. It prints 'no-user-hive-loaded' (FAIL) when no user profile is loaded, so scan while users are logged on.

Méthode de vérification

Méthode d'audit: Registre 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\' + $s + '\SOFTWARE\Policies\Microsoft\office\16.0\excel\security\fileblock') -Name 'xl4macros' -ErrorAction SilentlyContinue).'xl4macros'; if (-not ($null -ne $v -and @(2) -contains [int64]$v)) { $bad += $s + ':xl4macros=' + $v } }; if ($bad.Count -eq 0) { 'compliant' } else { 'non-compliant: ' + ($bad -join ', ') } }

Sortie attendue: compliant

Méthode de correction

Méthode de correction: Recommandation ou correctif d'infrastructure

Configure through Group Policy (User Configuration): User Configuration\Administrative Templates\Microsoft Excel 2016\Excel Options\Security\Trust Center\File Block Settings\Excel 4 macrosheets and add-in Files = Enabled: Open/Save blocked, use open policy

Propriétés

Systèmes d'exploitation: Tous
Étiquettes: officeproductivitycis-l1
Référence: CIS Microsoft Office Enterprise Benchmark v2.0.0 - 2.2.4.7.2.2.7 Ensure 'Excel 4 macrosheets and add-in files' is set to 'Enabled: Open/Save blocked, use open policy'

Vérifier cet hôte

Exécutez cette commande sur une machine que vous êtes autorisé à auditer. L'analyse est en lecture seule.

shell

tmaegis scan --target office