ORCA.205 - Common attachment type filter is enabled.
Overview
The common attachment type filter can block file types that commonly contain malware, including in internal emails.
Remediation action
Enable common attachment type filter.
Related Links
- Configure anti-malware policies
- Microsoft 365 Defender Portal - Anti-malware
- Recommended settings for EOP and Microsoft Defender for Office 365
Test Metadata
| Field | Value |
|---|---|
| Test ID | ORCA.205 |
| Severity | Medium |
| Suite | ORCA |
| Product | Defender |
| Related products | Exchange Online |
| Feature | Anti-malware |
| Area | Email and collaboration protection |
| Resource type | Policy |
| User impact | Low |
| Implementation cost | Low |
| MITRE ATT&CK | T1566.001 Spearphishing Attachment, T1204.002 Malicious File |
| Supports controls | nist-800-53-r5:SI-3 |
| PowerShell test | Test-ORCA205 |
| Services | ExchangeOnline |
Source
- Test:
tests/orca/Test.ORCA.205.ps1 - Documentation:
tests/orca/Test.ORCA.205.md