Credentials, tokens, or cookies from highly privileged users should not be exposed on vulnerable endpoints
MT.1080MediumDefenderExposure Management
Part of Maester · Defender · Exposure Management · All checks
Invoke-Maester -TestId MT.1080Overview
Section titled “Overview”Exfiltration of authentication artifacts on vulnerable device poses a significant security risk. Attackers who gain access to these credentials (e.g., by infostealer) can impersonate privileged users, bypass Conditional Access, and access sensitive the assigned sensitive roles. Protecting endpoints, especially used by privileged users, is essential to prevent unauthorized access and reduce attack surface.
How to fix
Section titled “How to fix”Review the details of risk and exposure score on the related device page from the Device Inventory in the Microsoft Defender XDR portal to improve the device’s security posture.
Details
Section titled “Details”Every attribute of this check
| Field | Value |
|---|---|
| Test ID | MT.1080 |
| Severity | Medium |
| Suite | Maester |
| Product | Defender |
| Feature | Exposure Management |
| Area | Privileged access |
| Resource type | User |
| User impact | Low |
| Implementation cost | Medium |
| MITRE ATT&CK | T1539 Steal Web Session Cookie, T1528 Steal Application Access Token |
| PowerShell test | Test-MtXspmExposedCredentialsForPrivilegedUsers |
| Services | Graph |
| Long running | Yes |
Source
Section titled “Source”- Test:
tests/maester/xspm/Test.MT.1080.ps1 - Documentation:
tests/maester/xspm/Test.MT.1080.md