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.Glupteba is usually dropped by exploit kits. It can download and install further malware and add the affected system to a botnet. It has the tendency to pretend to be an updater for legitimate software.
Malwarebytes protects users from Trojan.Glupteba by using real-time protection.
Malwarebytes can detect and remove Trojan.Glupteba without further user interaction.