Security checks / Check reference / Intune configuration

Intune Policy Attack Surface Reduction Block Ransomware Behavior

High Severity Microsoft 365 security check in the Intune configuration domain.

ASR rule to block ransomware behavior is not enabled Ransomware behavior detection blocks mass file encryption, shadow copy deletion, and other ransomware indicators This is a behavioral last line of defense Siemserva runs this check automatically across your tenant and maps every finding to the compliance frameworks below.

High SeverityIntune configuration
SenservaSenserva provides Three Free Unlimited Audits, including all tenants and full Claude MCP.Start my Audit

Check summary

Severity
High
Domain
Intune configuration
Rank in domain
4
Frameworks
6

What this check verifies

ASR rule to block ransomware behavior is not enabled

Why it matters

Ransomware behavior detection blocks mass file encryption, shadow copy deletion, and other ransomware indicators This is a behavioral last line of defense

How to fix it

Enable ASR rule to use advanced protection against ransomware

Siemserva flags every tenant where this check fails and, with Senserva Trustworthy AI remediation, can propose a validated fix you approve before it applies.

Find this in your own Microsoft 365

This page is the public reference for one check. Siemserva by Senserva runs it, and 650+ others, against your own tenant: it shows exactly where Intune Policy Attack Surface Reduction Block Ransomware Behavior is failing across your environment, ranks it against everything else by real risk, maps it to the frameworks your auditors ask about, and attaches a validated fix you approve before it applies.

Your Three Free Unlimited Audits cover all of it, free with registration: 1 scan to find, 2 to review your fixes.

Built for the people who own this outcome: security and IT teams closing gaps, auditors and compliance teams gathering evidence, and MSPs and MSSPs running it across every client tenant.

Start my AuditSee the productSolutions and who it is for

Ask your own AI about this check

Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.

Compliance framework mappings

Findings from this check serve as evidence for:

SCuBAMCSBNISTSOC2CISHIPAAMCSB ES-1MCSB ES-4

References

learn.microsoft.com: /mem/intune/protect/endpoint-security-asr-policy...learn.microsoft.com: /en-us/security/benchmark/azure/mcsb-endpoint-secu...

Related Intune configuration checks

Intune Policy Antivirus Archive ScanningIntune Policy Antivirus Behavior MonitoringIntune Policy Antivirus Cloud ProtectionIntune Policy Antivirus Email ScanningIntune Policy Antivirus IOAV ScanningIntune Policy Antivirus Network ScanningIntune Policy Antivirus Property Not FoundIntune Policy Antivirus PUA Protection

Common questions

What does the Intune Policy Attack Surface Reduction Block Ransomware Behavior check verify?

ASR rule to block ransomware behavior is not enabled It is a High Severity check in the Intune configuration domain, one of the 650+ checks Siemserva runs across Microsoft 365, Intune, Defender, and Entra ID.

How do I fix a Intune Policy Attack Surface Reduction Block Ransomware Behavior finding?

Enable ASR rule to use advanced protection against ransomware Siemserva ranks the finding by Severity and, with Senserva Trustworthy AI, can propose a validated, approve-before-apply configuration fix.

Which compliance frameworks does this check evidence?

Findings from this check map to SCuBA, MCSB, NIST, SOC2, CIS, HIPAA, and MCSB controls ES-1, ES-4. That mapping is what turns a scan finding into audit evidence.

Can I ask my own AI about this check?

Yes. This page includes a free copy-paste AI prompt carrying the check's facts: what it verifies, the risk, the remediation, and the framework mappings. Paste it into Claude, ChatGPT, or Copilot; cite-worthy detail without giving an AI access to your tenant.

All 672 checks with severities and mappings: the Microsoft 365 security checks catalog.

Senserva Survey

Check your own tenant free with Siemserva by Senserva

Siemserva by Senserva runs this check, Intune Policy Attack Surface Reduction... for example, across your own tenant: which tenants pass, which fail, ranked by Severity with the evidence attached.

  • Finds the most common Microsoft 365 security misconfigurations across your tenant, ranked by Severity
  • Surfaces the CVEs and missing patches that are actually being exploited, not just the long list
  • Evidence mapped to SCuBA, CIS, NIST, HIPAA, SOC 2, and MCSB, with validated approve-before-apply fixes
  • For security teams, auditors, and MSPs: one scan, bulk multi-tenant audits, client-ready reports
Compliance Status Report
Intune Policy Attack Surface Reduction... across 2 tenants, ranked by Severity
23
FAILING
87
PASSING
41
OTHER FINDINGS
CHECKSEVERITYSTATUSFINDINGS
Intune Policy Attack Surface Reduction...HighFAILING23
MFA for all usersCritical-11
Legacy authentication blockedHigh-6
Estimated report, sample data for illustration
Senserva is a Microsoft Intelligent Security Association member. Get Going with Senserva Senserva compliance Built for IT admins, security teams, and auditors, with audit-ready evidence.
Microsoft 365 compliance and audit evidence
See this check's evidence trail, click to play

How findings become audit evidence, in two minutes. Watch page · All videos.

Reference: the compliance and audit guide, and the full checks catalog.
Data notice: check definitions describe what Siemserva verifies and are provided as is, for informational purposes only, without warranty of any kind. Framework mappings are informational and do not constitute compliance advice; confirm requirements with your assessor. All use of this data is subject to the Senserva EULA.