What type of malware allows unauthorized remote access to a computer and is typically bundled with legitimate software?

The type of malware that allows unauthorized remote access to a computer and is typically bundled with legitimate software is a Trojan. Trojans are deceptive in nature; they trick users into installing them by masquerading as legitimate applications or software packages. Once installed, a Trojan can create a backdoor that gives attackers remote access to the victim's system, allowing them to steal data, install more malware, or manipulate the system without the user's consent.

In contrast, a virus requires a host file to spread and replicates itself through user interaction, while a worm is a self-replicating malware that spreads independently across networks. Ransomware, on the other hand, encrypts files on a victim's machine and demands payment to restore access but does not primarily focus on providing unauthorized remote access. Therefore, Trojans stand out as the most relevant type of malware in this context.