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:

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