AD-USER-07: No pre-authentication user count should be retrievable
| ID | AD-USER-07 |
| Severity | Info |
| Suite | Active Directory (on-premises) |
| Product | Active Directory |
| Feature | Users |
| Security area | Authentication |
| Resource type | User |
| MITRE ATT&CK | T1558.004 |
| Reads from | On-premises Active Directory |
What this checks and how to fix it
Section titled “What this checks and how to fix it”Accounts that do not require Kerberos pre-authentication are directly exposed to AS-REP roasting. Attackers can request offline-crackable material without first proving knowledge of the password.
Control Type
Section titled “Control Type”Detective
Security Recommendation
Section titled “Security Recommendation”Require pre-authentication for all accounts unless there is a justified exception. Review and remove legacy settings that disable this protection.
How the Test Works
Section titled “How the Test Works”This test retrieves Active Directory user data from Get-MtADDomainState and counts users where DoesNotRequirePreAuth = $true or the corresponding userAccountControl bit is set.
Related Tests
Section titled “Related Tests”Test-MtAdUserDelegationAllowedCountTest-MtAdUserKerberosDesOnlyCountTest-MtAdUserPasswordNotRequiredCount
Related links
Section titled “Related links”- Microsoft Defender for Identity: Unsecure account attributes
- ANSSI Active Directory checkpoints: Kerberos preauthentication disabled
Mito check. Author: soulemike. Open-source licences.
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