I also think it is a false positive test. After installing the tool "Completing the STM32CubeMonitor Setup Wizard" I am notified to click finish the setup and launch the tool.
When this is applied the tool launches, and it says it is loading the flows. But as soon as the tool is shown, the window is gone and the virus program show a treat:
Malicious Behaviour Detection
OfficeScan detected a Behavior Monitoring policy violation and blocked the offending process(es):
Unauthorized file Encryption in Real-time Scan
Infected file: STM32CubeMonitor.exe
A detailes link is also shown: https://www.trendmicro.com/vinfo/us/threat-encyclopedia/search/unauthorized%20file%20encryption