The built-in administrator account must be renamed.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-253435	WN11-SO-000020	SV-253435r991589_rule		Medium

Description

The built-in administrator account is a well-known account subject to attack. Renaming this account to an unidentified name improves the protection of this account and the system.

STIG	Date
Microsoft Windows 11 Security Technical Implementation Guide	2024-09-12

Details

Check Text (C-56888r829387_chk)

Verify the effective setting in Local Group Policy Editor.
Run "gpedit.msc".

Navigate to Local Computer Policy >> Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options.

If the value for "Accounts: Rename administrator account" is set to "Administrator", this is a finding.

Fix Text (F-56838r829388_fix)

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "Accounts: Rename administrator account" to a name other than "Administrator".