Ensure 'Configure Attack Surface Reduction rules: Set the state for each ASR rule' is set to '7674ba52-37eb-4a4f-a9a1- f0f9a1619a2c:1'

高レベル 1自動defender

説明

This rule blocks Adobe Reader from creating processes. Rule ID and name: - 7674ba52-37eb-4a4f-a9a1-f0f9a1619a2c (Block Adobe Reader from creating child processes) The recommended state for this setting is: 7674ba52-37eb-4a4f-a9a1- f0f9a1619a2c:1 (Block). Note: More information on ASR rules can be found at the following link: Use Attack surface reduction rules to prevent malware infection | Microsoft Docs Rationale: Attack surface reduction helps prevent actions and apps that are typically used by exploit-seeking malware to infect machines. Malware can download and launch payloads and break out of Adobe Reader through social engineering or exploits. 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:7674ba52-37eb-4a4f-a9a1-f0f9a1619a2c (REG_SZ); compliant when it is 1.

チェック方法

監査方法: Windows レジストリ

registry

$v = (Get-ItemProperty -Path 'Registry::HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Windows Defender Exploit Guard\ASR\Rules' -Name '7674ba52-37eb-4a4f-a9a1-f0f9a1619a2c' -ErrorAction SilentlyContinue).'7674ba52-37eb-4a4f-a9a1-f0f9a1619a2c'; if ($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 = 7674ba52-37eb-4a4f-a9a1-f0f9a1619a2c 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 7674ba52-37eb-4a4f-a9a1-f0f9a1619a2c -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 - 1.6.1.3 Ensure 'Configure Attack Surface Reduction rules: Set the state for each ASR rule' is set to '7674ba52-37eb-4a4f-a9a1- f0f9a1619a2c: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