(MT.1178) - ASR rules in setting catalog policies were not detected - #2143
(MT.1178) - ASR rules in setting catalog policies were not detected#2143royklo wants to merge 4 commits into
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Test-MtIntuneASRRules filtered configurationPolicies on templateReference/templateFamily eq 'endpointSecurityAttackSurfaceReduction', which only matches policies authored through Endpoint security > Attack surface reduction. ASR rules configured through Devices > Configuration > Settings catalog land on a policy with templateFamily 'none' while using the identical setting definition IDs -- the definitions are published with visibility 'settingsCatalog,template' -- so those tenants reported "No Endpoint Security Attack Surface Reduction policies found" and MT.1178 failed even with every Standard Protection baseline rule set to Block. Query Windows configuration policies instead and identify ASR policies by the settings they actually contain. This also drops the Device Control and Exploit Protection profiles, which share the endpointSecurityAttackSurfaceReduction template family but configure no ASR rules, and previously inflated the policy count with empty rule tables. The report now states whether each policy was authored via Endpoint Security or the Settings catalog. Known gap left unchanged: ASR rules authored through the ADMX-backed ExploitGuard_ASR_Rules setting store the rule as a GUID with a numeric state (0/1/2/6) rather than a _block/_audit value suffix, so they are still not parsed. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
📝 WalkthroughWalkthroughThe ASR check now evaluates all Windows Intune configuration policies, including Endpoint Security and Settings catalog policies. It filters unrelated policies, identifies policy sources, reports ASR results, and adds Pester coverage. ChangesIntune ASR coverage
Estimated code review effort: 3 (Moderate) | ~20 minutes Merge Risk: 🔵 Low · up to The change broadens ASR detection to supported Settings catalog configurations, but the documentation currently implies coverage for ADMX-backed ExploitGuard_ASR_Rules settings that are not parsed; affected configurations could still report no rules, so the PR is mergeable with explicit owner awareness and documentation follow-up. Sequence Diagram(s)sequenceDiagram
participant Test as Test-MtIntuneASRRules
participant Graph as Intune Graph
participant Results as Test result reporting
Test->>Graph: Query Windows configuration policies
Graph-->>Test: Return policy settings
Test->>Test: Filter ASR rules and identify policy source
Test->>Results: Report compliance and policy source
Suggested reviewers: 🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
✨ Finishing Touches🧪 Generate unit tests (beta)
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Removed redundant comments explaining ASR rule filtering logic.
Removed comments regarding ASR rules and policy checks.
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Pull request overview
Fixes MT.1178 (Test-MtIntuneASRRules) so ASR rules configured via Settings catalog are detected and evaluated, by identifying ASR policies based on contained ASR settings rather than templateReference/templateFamily.
Changes:
- Update
Test-MtIntuneASRRulesto enumerate Windows configuration policies and detect ASR policies by ASR rule setting definition IDs (excluding non-ASR profiles that share the ASR template family). - Improve report output to show whether each ASR policy originated from Endpoint Security or Settings catalog, and adjust the “nothing found” behavior to mean “no ASR rules anywhere.”
- Add unit test coverage for the settings-catalog regression and related scenarios; update companion documentation to reflect both authoring surfaces.
Reviewed changes
Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.
| File | Description |
|---|---|
| powershell/tests/functions/Test-MtIntuneASRRules.Tests.ps1 | Adds unit tests validating settings-catalog detection, exclusion behavior, fail/skip paths. |
| powershell/public/maester/intune/Test-MtIntuneASRRules.ps1 | Switches from template-family filtering to settings-based ASR detection; improves reporting and “no rules found” handling. |
| powershell/public/maester/intune/Test-MtIntuneASRRules.md | Documents that both Endpoint Security and Settings catalog ASR configurations are evaluated and reported. |
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Up to standards ✅🟢 Issues
|
The summary line claimed the check passes when "at least one ASR policy has rules configured in Block or Audit mode", which contradicted the stated pass criteria further down: every Standard Protection baseline rule must be in Block or Audit. Corrected, and noted that modes are pooled across policies. Also condenses the technique and mode lists, and drops the implementation detail about how policies are enumerated. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
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Inline comments:
In `@powershell/public/maester/intune/Test-MtIntuneASRRules.md`:
- Line 20: Update the ASR rules documentation to qualify Settings catalog
support as limited to supported setting instances, and explicitly state that the
ADMX-backed ExploitGuard_ASR_Rules format is not parsed and may produce false
“no rules found” results. Keep the Endpoint security and supported Settings
catalog paths documented as valid.
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Problem
Test-MtIntuneASRRulesfilters policies ontemplateReference/templateFamily eq 'endpointSecurityAttackSurfaceReduction', which only matches ASR profiles created under Endpoint security > Attack surface reduction.ASR rules created via Devices > Configuration > Settings catalog land on a policy with
templateFamily: "none"but use the identical setting definition IDs — the definitions are published withvisibility: "settingsCatalog,template", so it's one shared definition surfaced in both places.Result: a tenant with all three Standard Protection baseline rules on Block via the Settings catalog reports "No Endpoint Security Attack Surface Reduction policies found" and MT.1178 fails. Verified against such a tenant — all 17 configured rules were invisible to the current query.
Related: Device Control and Exploit Protection profiles also carry the
endpointSecurityAttackSurfaceReductionfamily, so they inflated the policy count and produced empty0 rulestables.Fix
$filter=platforms has 'windows10') and identify ASR policies by the settings they contain, not by how they were authored.Testing
New
powershell/tests/functions/Test-MtIntuneASRRules.Tests.ps1, 5/5 passing: settings-catalog detection (the regression), Device Control exclusion, baseline rule not in Block/Audit →$false, no ASR rules →$false, unlicensed → skipped. PSScriptAnalyzer clean.Docs
Companion
.mdupdated to note both authoring surfaces count. Generated pages (MT.1178.md, the command.mdx) left untouched — bots refresh those on push tomain.Known gap
ADMX-backed
ExploitGuard_ASR_Rulesstores rules as a GUID plus numeric state (0/1/2/6) instead of a_block/_auditsuffix, so those still parse as Not configured. Left out rather than shipping untested parsing — happy to follow up.Summary by CodeRabbit
New Features
Bug Fixes
Documentation