TMA-OFFICE-2.2.4.7.2.10

Ensure 'Prevent Excel from running XLM macros' is set to 'Enabled'

TinggiLevel 1Otomatisoffice

Deskripsi

This policy setting will prevent Excel from running Excel 4.0 (XLM) macros. XLM macros were first added to Excel in 1992 and were disabled in Excel (Build 16.0.14427.10000) by Microsoft in 2021. The recommended state for this setting is: Enabled. Rationale: XLM is data macro format from the early nineties that was not built with security in mind. Macros can be easily exploited and are a favorite hiding place of malicious code. User setting: the audit checks HKEY_USERS\<SID>\SOFTWARE\Policies\Microsoft\office\16.0\excel\security:xl4macrooff (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.

Cara pemeriksaan

Metode audit: Registry 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\' + $s + '\SOFTWARE\Policies\Microsoft\office\16.0\excel\security') -Name 'xl4macrooff' -ErrorAction SilentlyContinue).'xl4macrooff'; if (-not ($null -ne $v -and @(1) -contains [int64]$v)) { $bad += $s + ':xl4macrooff=' + $v } }; if ($bad.Count -eq 0) { 'compliant' } else { 'non-compliant: ' + ($bad -join ', ') } }

Output yang diharapkan: compliant

Cara perbaikan

Metode perbaikan: Panduan atau patch infrastruktur

Configure through Group Policy (User Configuration): User Configuration\Administrative Templates\Microsoft Excel 2016\Excel Options\Security\Trust Center\Prevent Excel from running XLM macros = Enabled

Properti

Sistem operasi: Apa saja
Tag: officeproductivitycis-l1
Referensi: CIS Microsoft Office Enterprise Benchmark v2.0.0 - 2.2.4.7.2.10 Ensure 'Prevent Excel from running XLM macros' is set to 'Enabled'

Periksa host ini

Jalankan ini pada mesin yang diizinkan untuk Anda audit. Pemindaian bersifat hanya baca.

shell

tmaegis scan --target office