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Remote calls to the Security Account Manager (SAM) must be restricted to Administrators.


Finding ID Version Rule ID IA Controls Severity
V-225013 WN16-MS-000310 SV-225013r569186_rule Medium
The Windows Security Account Manager (SAM) stores users' passwords. Restricting Remote Procedure Call (RPC) connections to the SAM to Administrators helps protect those credentials.
Microsoft Windows Server 2016 Security Technical Implementation Guide 2022-03-01


Check Text ( C-26704r465941_chk )
This applies to member servers and standalone systems; it is NA for domain controllers.

If the following registry value does not exist or is not configured as specified, this is a finding.

Registry Path: \SYSTEM\CurrentControlSet\Control\Lsa\

Value Name: RestrictRemoteSAM

Value Type: REG_SZ
Value: O:BAG:BAD:(A;;RC;;;BA)
Fix Text (F-26692r465942_fix)
Navigate to the policy Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "Network access: Restrict clients allowed to make remote calls to SAM".
Select "Edit Security" to configure the "Security descriptor:".

Add "Administrators" in "Group or user names:" if it is not already listed (this is the default).

Select "Administrators" in "Group or user names:".

Select "Allow" for "Remote Access" in "Permissions for "Administrators".

Click "OK".

The "Security descriptor:" must be populated with "O:BAG:BAD:(A;;RC;;;BA) for the policy to be enforced.