It used the typical client–server model where the client would be under operation by the attacker and the server is what would infect the victim. Beast was one of the first trojans to feature a reverse connection to its victims, and once established it gave the attacker complete control over the infected computer.
This type of malware employed a standard client–server model where the client was compromised by the attacker, and the server became infected with malicious software. Beast was an early example of a Trojan that allowed attackers to establish a reverse connection to their victims, giving them complete control over the infected system.