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 the generic detection for tools that exploit SMB vulnerabilities that were released by the so-called ShadowBrokers aka Equation group.
Malwarebytes can remove this potentially unwanted software without further user interaction. A full scan of the system is advisable if you find this Trojan is or has been active as this activity may have resulted in other infections.