Security checks / Check reference / Email security
Malware SCuBA Exo Malware Scanning
High Severity Microsoft 365 security check in the Email security domain.
SCUBA/CISA baseline check: Exchange Online malware scanning configuration Verifies that anti-malware policies are properly configured Malicious attachments-including macro payloads and embedded scripts-land in mailboxes and collaboration sites, increasing ransomware and infostealer risk Remediation costs scale quickly when payloads execute across endpoints Siemserva runs this check automatically across your tenant and maps every finding to the compliance frameworks below.
Senserva provides Three Free Unlimited Audits, including all tenants and full Claude MCP.Start my Audit
Check summary
What this check verifies
SCUBA/CISA baseline check: Exchange Online malware scanning configuration Verifies that anti-malware policies are properly configured
Why it matters
Malicious attachments-including macro payloads and embedded scripts-land in mailboxes and collaboration sites, increasing ransomware and infostealer risk Remediation costs scale quickly when payloads execute across endpoints
How to fix it
Enforce advanced malware protection; apply strict policies to high-risk user cohorts and monitor bypass attempts
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 Malware SCuBA Exo Malware Scanning 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.
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:
References
Related Email security checks
Common questions
What does the Malware SCuBA Exo Malware Scanning check verify?
SCUBA/CISA baseline check: Exchange Online malware scanning configuration Verifies that anti-malware policies are properly configured It is a High Severity check in the Email security domain, one of the 650+ checks Siemserva runs across Microsoft 365, Intune, Defender, and Entra ID.
How do I fix a Malware SCuBA Exo Malware Scanning finding?
Enforce advanced malware protection; apply strict policies to high-risk user cohorts and monitor bypass attempts 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, including SCuBA policy MS.DEFENDER.1.1v1, MS.DEFENDER.1.2v1, MS.DEFENDER.1.3v1, MS.DEFENDER.1.4v1, MS.DEFENDER.1.5v1, MS.DEFENDER.2.1v1, MS.DEFENDER.2.2v1, MS.DEFENDER.2.3v1, MS.DEFENDER.3.1v1, MS.DEFENDER.4.1v2, and MCSB controls LT-1, LT-3. 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.