TMA-DEFENDER-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'

高レベル 1自動defender

説明

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.

チェック方法

監査方法: Windows レジストリ

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" }

期待される出力: compliant

修正方法

修正方法: ガイダンスまたは IaC パッチ

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

プロパティ

オペレーティングシステム: すべて
タグ: defenderantiviruscis-l1
参照: 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'

このホストをチェック

監査が許可されているマシンで実行してください。スキャンは読み取り専用です。

shell

tmaegis scan --target defender