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

VisokaNivo 1Automatskaoffice

Opis

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.

Kako se proverava

Metod provere: Windows registar

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 ', ') } }

Očekivani izlaz: compliant

Kako se ispravlja

Metod ispravke: Smernica ili zakrpa infrastrukture

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

Svojstva

Operativni sistemi: Bilo koji
Oznake: officeproductivitycis-l1
Referenca: 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'

Proverite ovaj računar

Pokrenite ovo na računaru za koji imate dozvolu za proveru. Skeniranje radi u režimu samo za čitanje.

shell

tmaegis scan --target office