Ensure the common attachment types filter is enabled in the default anti-malware policy

MittelStufe 1Automatisiertm365

Beschreibung

The common attachment filter blocks executable and script attachment types that are frequently used to deliver malware. Requires an already-connected Exchange Online session: Install-Module ExchangeOnlineManagement; Connect-ExchangeOnline (View-Only Organization Management is sufficient). The audit throws if no session exists.

So wird geprüft

Prüfmethode: Shell-Befehl

shell

$ErrorActionPreference = 'Stop'; if (-not (Get-Command Get-ConnectionInformation -ErrorAction SilentlyContinue) -or -not (Get-ConnectionInformation)) { throw 'Not connected: run Connect-ExchangeOnline first' }; $p = Get-MalwareFilterPolicy -Identity Default -ErrorAction Stop; if ($p.EnableFileFilter -eq $true) { 'compliant' } else { 'noncompliant' }

Erwartete Ausgabe: compliant

So wird behoben

Behebungsmethode: Anleitung oder Infrastruktur-Patch

Set-MalwareFilterPolicy -Identity Default -EnableFileFilter $true

Eigenschaften

Betriebssysteme: Beliebig
Tags: m365malware
Referenz: CIS Microsoft 365 Foundations Benchmark v7.0.0 - Exchange Online Protection / Anti-malware - common attachments filter (verify section number for your release)

Diesen Host prüfen

Führen Sie dies auf einem Rechner aus, den Sie prüfen dürfen. Der Scan ist schreibgeschützt.

shell

tmaegis scan --target m365