What is the essential purpose of malicious bots in cybersecurity?

The essential purpose of malicious bots in cybersecurity is primarily to control computers by connecting to a central server. This capability allows attackers to manage a network of compromised devices, often referred to as a botnet. Botnets can be used for various malicious activities, such as launching distributed denial-of-service (DDoS) attacks, stealing data, or distributing malware. By controlling these devices remotely, cybercriminals can execute commands, gather sensitive information, or facilitate other forms of cyber attacks without the user’s knowledge.

In contrast, displaying advertisements to users, encrypting data for ransom, and assisting in user account verification do not align with the fundamental nature of malicious bots. While some malicious activities can involve elements of ad fraud or ransomware, these are not the primary function of bots when they are employed in a cyber attack context. The defining trait of malicious bots lies in their ability to establish control over a large number of systems, making option B the most accurate representation of their purpose in cybersecurity threats.