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.Crypt.NTH is the generic detection for a family of obfuscated bundlers targeting Windows systems.
The Trojan.Crypt.NTH that are still active today are detected as Adware.LoadMoney. Malwarebytes protects users from Adware.LoadMoney by using real-time protection.
Malwarebytes can detect and remove Trojan.Crypt.NTH without further user interaction.