Ensure 'Configure Attack Surface Reduction rules: Set the state for each ASR rule' is set to '56a863a9-875e-4185-98a7- b882c64b5ce5:1'

TinggiLevel 1Otomatisdefender

Deskripsi

This rule prevents an application from writing a vulnerable signed driver to disk. Rule ID and name: - 56a863a9-875e-4185-98a7-b882c64b5ce5 (Block abuse of exploited vulnerable signed drivers) The recommended state for this setting is: 56a863a9-875e-4185-98a7- b882c64b5ce5:1 (Block). Rationale: Attack surface reduction helps prevent actions and apps that are typically used by exploit-seeking malware to infect systems. Vulnerable signed drivers can be exploited by local applications that have sufficient privileges to gain access to the kernel. 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:56a863a9-875e-4185-98a7-b882c64b5ce5 (REG_SZ); compliant when it is 1.

Cara pemeriksaan

Metode audit: Registry Windows

registry

$v = (Get-ItemProperty -Path 'Registry::HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Windows Defender Exploit Guard\ASR\Rules' -Name '56a863a9-875e-4185-98a7-b882c64b5ce5' -ErrorAction SilentlyContinue).'56a863a9-875e-4185-98a7-b882c64b5ce5'; if ($null -eq $v) { 'unset' } elseif (($null -ne $v -and @('1') -contains "$v")) { 'compliant' } else { "non-compliant: $v" }

Output yang diharapkan: compliant

Cara perbaikan

Metode perbaikan: Panduan atau patch infrastruktur

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 = 56a863a9-875e-4185-98a7-b882c64b5ce5 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 56a863a9-875e-4185-98a7-b882c64b5ce5 -AttackSurfaceReductionRules_Actions 1

Properti

Sistem operasi: Apa saja
Tag: defenderantiviruscis-l1
Referensi: CIS Microsoft Defender Antivirus Benchmark v1.0.0 - 1.6.1.2 Ensure 'Configure Attack Surface Reduction rules: Set the state for each ASR rule' is set to '56a863a9-875e-4185-98a7- b882c64b5ce5:1'

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shell

tmaegis scan --target defender