TMA-DEFENDER-1.5.2

Ensure 'Configure the 'Block at First Sight' feature' is set to 'Enabled'

ВысокийУровень 1Автоматическаяdefender

Описание

This policy setting configures whether the device checks (in real time) with the Microsoft Active Protection Service (MAPS) before allowing certain content to be run or accessed. The block at first sight feature works when Microsoft Defender Antivirus encounters a suspicious but undetected file. Rationale: Enabling the Block at First Sight feature enhances threat protection by using next-generation protection to detect new malware and block it within seconds. 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\Spynet:DisableBlockAtFirstSeen (REG_DWORD); compliant when it is 0. Remediation writes 0 locally; in a domain set it through the ADMX so Group Policy does not revert it.

Как проверяется

Метод проверки: Реестр Windows

registry

$v = (Get-ItemProperty -Path 'Registry::HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Spynet' -Name 'DisableBlockAtFirstSeen' -ErrorAction SilentlyContinue).'DisableBlockAtFirstSeen'; if ($null -eq $v) { 'unset' } elseif (($null -ne $v -and @(0) -contains [int64]$v)) { 'compliant' } else { "non-compliant: $v" }

Ожидаемый вывод: compliant

Как исправляется

Метод исправления: Команда оболочки

shell

$p = 'Registry::HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Spynet'; if (-not (Test-Path -Path $p)) { New-Item -Path $p -Force | Out-Null }; New-ItemProperty -Path $p -Name 'DisableBlockAtFirstSeen' -Value 0 -PropertyType DWord -Force | Out-Null

Свойства

Операционные системы: Любая
Теги: defenderantiviruscis-l1
Источник: CIS Microsoft Defender Antivirus Benchmark v1.0.0 - 1.5.2 Ensure 'Configure the 'Block at First Sight' feature' is set to 'Enabled'

Проверить этот хост

Выполните команду на компьютере, аудит которого вам разрешён. Сканирование работает только на чтение.

shell

tmaegis scan --target defender