A user downloads and installs an MP3 converter, and runs the application. Upon running the application, the antivirus detects a new port in a listening state. Which of the following has the user…

A Remote Access Trojan (RAT) is a type of malware designed to provide an attacker with unauthorized remote control over a compromised system. To achieve this, RATs frequently establish a new listening port on the victim's machine, allowing the attacker to initiate an inbound connection and manage the system remotely.

Worms are primarily characterized by their ability to self-replicate and spread autonomously across networks, not by opening listening ports for direct remote control by an attacker.

Ransomware's primary function is to encrypt a victim's files and demand a ransom for their decryption, rather than to establish a listening port for remote administrative access.

While a bot allows remote control as part of a botnet, it typically initiates outbound connections to its command and control server rather than opening a listening port for arbitrary inbound connections from an attacker.