Countercept Agent for Windows – 2025-05-16 Update #2

The update is related to the Countercept Agent’s Ultralight Core component. Ultralight Core provides low-level functionality such as file hash calculation as part of the agent’s reporting of endpoint activity.

Product Name: Countercept Agent for Windows – Ultralight Core

Version: 2.1.20390

Pilot Availability: 19/05/2025

General Availability: 26/05/2025

Predecessor: 2.1.20210

Release Purpose:

• General maintenance

Customer Action Required:

• The Operating System should be Azure Code Signing (ACS) compliant to receive this update. See 
  
  https://community.withsecure.com/en/kb/articles/29714-changes-in-support-on-microsoft-windows-minimum-patch-level
  
  
            for more details.
  Any endpoints which are not ACS-compliant will continue to run the older version of the Ultralight Core (2.1.16183).

Name Changes:

New service will be registered with this release:

• wsulavprothoster_mdr

New process will be added with this release:

• fsulprothoster.exe

More details can be found at Changes to the Windows EPP Scanning Components – May 2025

Files Updated:

• CapricornScanner.exe
• fsulgk.sys
• install.exe
• uninstall.exe

New Features and Enhancements:

• N/A

General Maintenance:

• Fixes for issues identified during 2.1.20350 pre-Pilot.
• General maintenance of functionality not utilized by Countercept

OS Support:

• Windows 10, 11
• Windows Server 2012, 2012 R2, 2016, 2019, 2022, 2025