Trojan.Agent refers to a generic Trojan malware detection. It is used for detections that are either associated with no specific malware families or not enough information is available to pinpoint the malware family.
This is a detection for Trojans that use the Windows Management Instrumentation (WMI) infrastructure to alter victims’ browser shortcut files in order to add the target site so the browser(s) open with that site.
You can read more about WMI hijackers in our blog post, Explained: WMI hijackers.
The majority of these hijackers are installed by bundlers.
Malwarebytes can remove this threat without further user interaction. However, a reboot is required after threat removal.