Ensure 'Configure Attack Surface Reduction rules: Set the state for each ASR rule' is set to 'e6db77e5-3df2-4cf1-b95a- 636979351e5b:1'

ÉlevéeNiveau 1Automatiséedefender

Description

This rule prevents malware from abusing WMI to attain persistence on a device. Rule ID and name: - e6db77e5-3df2-4cf1-b95a-636979351e5b (Block persistence through WMI event subscription) The recommended state for this setting is: e6db77e5-3df2-4cf1-b95a- 636979351e5b:1 (Block). Rationale: Attack surface reduction helps prevent actions and apps that are typically used by exploit-seeking malware to infect machines. Fileless threats employ various tactics to stay hidden, to avoid being seen in the file system, and to gain periodic execution control. 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:e6db77e5-3df2-4cf1-b95a-636979351e5b (REG_SZ); compliant when it is 1.

Méthode de vérification

Méthode d'audit: Registre Windows

registry

$v = (Get-ItemProperty -Path 'Registry::HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Windows Defender Exploit Guard\ASR\Rules' -Name 'e6db77e5-3df2-4cf1-b95a-636979351e5b' -ErrorAction SilentlyContinue).'e6db77e5-3df2-4cf1-b95a-636979351e5b'; if ($null -eq $v) { 'unset' } elseif (($null -ne $v -and @('1') -contains "$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 = e6db77e5-3df2-4cf1-b95a-636979351e5b with a value of 1. Test in audit mode (2) first. Local alternative (writes Defender preferences, not the Group Policy value this audit reads): Add-MpPreference -AttackSurfaceReductionRules_Ids e6db77e5-3df2-4cf1-b95a-636979351e5b -AttackSurfaceReductionRules_Actions 1

Propriétés

Systèmes d'exploitation: Tous
Étiquettes: defenderantiviruscis-l1
Référence: CIS Microsoft Defender Antivirus Benchmark v1.0.0 - 1.6.1.13 Ensure 'Configure Attack Surface Reduction rules: Set the state for each ASR rule' is set to 'e6db77e5-3df2-4cf1-b95a- 636979351e5b:1'

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