Ensure 'Configure Attack Surface Reduction rules: Set the state for each ASR rule' is set to '26190899-1602-49e8-8b27- eb1d0a1ce869:2' or higher

ÉlevéeNiveau 1Automatiséedefender

Description

This rule prevents Outlook from creating child processes, while still allowing legitimate Outlook functions. Rule ID and name: - 26190899-1602-49e8-8b27-eb1d0a1ce869 (Block Office communication application from creating child processes) The recommended state for this setting is: 26190899-1602-49e8-8b27- eb1d0a1ce869:2 (Audit). Rationale: This ASR rule protects against social engineering attacks and prevents exploiting code from abusing vulnerabilities in Outlook. It also protects against Outlook rules and forms exploits that attackers can use when a user's credentials are compromised. Audit reads the Group Policy registry value and prints 'compliant', 'unset' (policy not configured, reported as FAIL) or the non-compliant value. Registry value: HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Windows Defender Exploit Guard\ASR\Rules:26190899-1602-49e8-8b27-eb1d0a1ce869 (REG_SZ); compliant when it is 2 or 1.

Méthode de vérification

Méthode d'audit: Registre Windows

registry

$v = (Get-ItemProperty -Path 'Registry::HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Windows Defender Exploit Guard\ASR\Rules' -Name '26190899-1602-49e8-8b27-eb1d0a1ce869' -ErrorAction SilentlyContinue).'26190899-1602-49e8-8b27-eb1d0a1ce869'; if ($null -eq $v) { 'unset' } elseif (($null -ne $v -and @('2','1') -contains "$v")) { 'compliant' } else { "non-compliant: $v" }

Sortie attendue: compliant

Méthode de correction

Méthode de correction: Recommandation ou correctif d'infrastructure

Configure through Group Policy: Computer Configuration\Policies\Administrative Templates\Windows Components\Microsoft Defender Antivirus\Microsoft Defender Exploit Guard\Attack Surface Reduction\Configure Attack Surface Reduction rules: Set the state for each ASR rule = 26190899-1602-49e8-8b27-eb1d0a1ce869 with a value of 2 or 1. Test in audit mode (2) first. Local alternative (writes Defender preferences, not the Group Policy value this audit reads): Add-MpPreference -AttackSurfaceReductionRules_Ids 26190899-1602-49e8-8b27-eb1d0a1ce869 -AttackSurfaceReductionRules_Actions 2

Propriétés

Systèmes d'exploitation: Tous
Étiquettes: defenderantiviruscis-l1
Référence: CIS Microsoft Defender Antivirus Benchmark v1.0.0 - 1.6.1.12 Ensure 'Configure Attack Surface Reduction rules: Set the state for each ASR rule' is set to '26190899-1602-49e8-8b27- eb1d0a1ce869:2' or higher

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 defender