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.Kryptic is a generic detection for Trojans that are obfuscated in any way and that do not (yet) fit in one of the known families.
Malwarebytes protects users from Trojan.Kryptic by using real-time protection. At the moment there are no live detections classified as Trojan.Kryptic.
Malwarebytes can detect and remove Trojan.Kryptic without further user interaction.