What best describes the software that will give the attacker remote access to the victim's machine but is wrapped with a legitimate program in an attempt to trick the victim into installing it?

A remote access Trojan (RAT) is malware that gives the attacker remote access to the victim’s machine. Macro viruses operate inside Microsoft Office files. Although a backdoor will give access, it is usually something in the system put there by programmers, not introduced by malware. A RAT is a type of Trojan horse, but a Trojan horse is more general than what is described in the scenario.