What is a Botnet?
A Botnet is an army of automated programs that are controlled from a central server, also known as a command-and-control (C&C) server. They are often used to execute various malicious activities, including launching DDoS attacks, stealing login credentials, mining cryptocurrency, or even scanning for more vulnerable devices to infect. The versatility of bots is what makes them the Swiss Army knife of cybercrime and the single most dangerous threat to your organization’s online security.
Typically, a C&C server communicates with infected devices using either a centralized or peer-to-peer model. The centralized model is easier for attackers to manage but has a single point of failure. The peer-to-peer (P2P) model, on the other hand, is harder to target since it relies on direct communication between bots.
While many types of devices can become infected by bot malware, Internet-of-Things (IoT) devices are especially popular targets for criminals. This is due to their lower levels of security, easy accessibility via remote access features, and use of default passwords.
Recognizing early warning signs of a bot infection is key to preventing the damage they can cause. These symptoms can include sluggish performance, frequent application crashes, and unexplained network or data usage. Using a firewall to monitor outbound traffic, and applying updates and patches promptly, can help reduce the likelihood of your devices being compromised. Educating users on safe browsing practices, best practices for using IoT devices, and the importance of changing default passwords can further decrease your exposure to this significant risk.