ORCA.179: Safe Links is enabled intra-organization.
| ID | ORCA.179 |
| Severity | Medium |
| Suite | ORCA |
| Product | Defender |
| Related products | Exchange Online |
| Feature | Safe Links |
| Security area | Email and collaboration protection |
| Resource type | Policy |
| User impact of fixing | Low |
| Effort to fix | Low |
| Framework controls | nist-800-53-r5:SI-3 Malicious Code Protection |
| MITRE ATT&CK | T1534, T1204.001 |
| Reads from | Exchange Online |
| Licence needed | ATP_ENTERPRISE |
What this checks and how to fix it
Section titled “What this checks and how to fix it”Phishing attacks are not limited from external users. Commonly, when one user is compromised, that user can be used in a process of lateral movement between different accounts in your organization. Configuring Safe Links so that internal messages are also re-written can assist with lateral movement using phishing. The built-in policy is ignored in this check, as it only provides the minimum level of protection.
Remediation action
Section titled “Remediation action”Enable Safe Links between internal users.
Related Links
Section titled “Related Links”- Microsoft 365 Defender Portal - Safe links
- Recommended settings for EOP and Microsoft Defender for Office 365
Mito check, based on ORCA. Author: soulemike. Open-source licences.
Open-source licences. CIS Benchmark material © Center for Internet Security, Inc.; CISA SCuBA baselines are public domain (CC0).
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