2.3.1.7 Configure 'Accounts: Rename guest account'

Information

The built-in local guest account is another well-known name to attackers. It is recommended to rename this account to something that does not indicate its purpose. Even if you disable this account, which is recommended, ensure that you rename it for added security. On Domain Controllers, since they do not have their own local accounts, this rule refers to the built-in Guest account that was established when the domain was first created.

Rationale:

The Guest account exists on all computers that run the Windows 2000 or newer operating systems. If you rename this account, it is slightly more difficult for unauthorized persons to guess this privileged user name and password combination.

Impact:

There should be little impact, because the Guest account is disabled by default.

Solution

To establish the recommended configuration via GP, configure the following UI path:

Computer Configuration\Policies\Windows Settings\Security Settings\Local Policies\Security Options\Accounts: Rename guest account

Default Value:

Guest.

Additional Information:

Microsoft Windows Server 2016 Security Technical Implementation Guide:
Version 2, Release 2, Benchmark Date: May 04, 2021

Vul ID: V-225027
Rule ID: SV-225027r569186_rule
STIG ID: WN16-SO-000040
Severity: CAT II

See Also

https://workbench.cisecurity.org/files/3476