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.
Backdoor.Bot is the generic detection for backdoors that allow the affected system to be added to a botnet.
Malwarebytes protects users from Backdoor.Bot by using real-time protection.
Malwarebytes can detect and remove Backdoor.Bot without further user interaction.