TMAegis
More rules for intune-defender

TMA-INTUNE-DEFENDER-2.11

Ensure 'ASR: Block Adobe Reader from creating child processes' is set to 'Block'

MediumLevel 1Automatedintune-defender

Description

This rule blocks Adobe Reader from creating processes. The recommended state for this setting is: Block. Audit: reads the Intune PolicyManager ASR rules value (via the WinningProvider GUID) and requires the rule entry 7674ba52-37eb-4a4f-a9a1-f0f9a1619a2c=1 (Block).

How it is checked

Audit method: Windows registry

registry
$p = (Get-ItemProperty -Path 'Registry::HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\PolicyManager\current\device\Defender' -Name 'AttackSurfaceReductionRules_WinningProvider' -ErrorAction SilentlyContinue).'AttackSurfaceReductionRules_WinningProvider'; if (-not $p) { 'non-compliant: no ASR WinningProvider' } else { $p = ([string]$p).Trim('{}'); $k = 'Registry::HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\PolicyManager\Providers\' + $p + '\default\Device\Defender'; if (-not (Test-Path $k)) { $k = 'Registry::HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\PolicyManager\Providers\{' + $p + '}\default\Device\Defender' }; $v = (Get-ItemProperty -Path $k -Name 'AttackSurfaceReductionRules' -ErrorAction SilentlyContinue).'AttackSurfaceReductionRules'; $have = @(([string]$v) -split '\|' | ForEach-Object { $_.Trim().ToLower() }); $want = @('7674ba52-37eb-4a4f-a9a1-f0f9a1619a2c=1'); if (@($want | Where-Object { $have -contains $_ }).Count -gt 0) { 'compliant' } else { 'non-compliant: ' + $v } }
Expected output
compliant

How it is fixed

Fix method: Guidance or infrastructure patch

To establish the recommended configuration via configuration profiles, set the following Settings Catalog path to Block. Defender\Block Adobe Reader from creating child processes

Properties

Operating systems
Any
Tags
intune-defenderintuneregistry
Reference
CIS Microsoft Intune for Microsoft Defender Antivirus Benchmark v1.0.0 - 2.11 Ensure 'ASR: Block Adobe Reader from creating child processes' is set to 'Block'

Check this host

Run this on a machine you are allowed to audit. The scan is read-only.

shell
tmaegis scan --target intune-defender