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.
Trojan.Agent.Proxy is a generic detection type for Trojans that change the proxy settings on the infected system.
Malwarebytes protects users from Trojan.Agent.Proxy by using real-time protection.
Malwarebytes can detect and remove Trojan.Agent.Proxy without further user interaction.