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

CaoCấp 1Tự độngdefender

Mô tả

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.

Cách kiểm tra

Phương pháp kiểm tra: Windows Registry

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" }

Đầu ra mong đợi: compliant

Cách khắc phục

Phương pháp khắc phục: Hướng dẫn hoặc bản vá hạ tầng

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

Thuộc tính

Hệ điều hành: Bất kỳ
Thẻ: defenderantiviruscis-l1
Tham chiếu: 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