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.
Some variants of Trojan.Miuref alter search results to get the victims to visit the sites they promote. They also have the ability to download and run other malware.
These Trojans are usually installed by other malware, but they have also been spotted as email attachments.
Malwarebytes protects users from Trojan.Miuref by using real-time protection.
Malwarebytes can detect and remove Trojan.Miuref without further user interaction.