Backdoor.Zapchast is Malwarebytes’ detection name for a family of Trojans that installs an mIRC client on the affected system.
Backdoor.Zapchast allows the threat actor to take control of the affected system. They often deploy a keylogger given this chance.
These Trojans are spread by email as attachments most of the time.
Malwarebytes protects users from Backdoor.Zapchast by using real-time potection.
Malwarebytes can remove Backdoor.Zapchast without further user interaction.
You may find additional malware if this Trojan has been active.