Protecting Against Botnet Attacks
A botnet is a network of computer devices (typically PCs and IoT gear like routers and cameras) infected with malware, controlled by hackers and used for automated attacks. Attacks may include DDoS attacks, stealing passwords, or spying on users.
The hacker who controls the botnet, also known as a botmaster, infects computers and other devices with malware through exploiting software vulnerabilities, drive-by downloads from compromised websites, fake security updates, phishing emails, or Trojan horse programs. The infected machines then monitor instructions distributed by the botnet’s command-and-control server. The bots then carry out those commands on a large scale, such as inflicting DDoS attacks or spamming people with phishing scams.
Botnets come in a variety of forms, ranging from centrally controlled to decentralized and peer-to-peer (P2P). The pros for attackers of centralized botnets are that they are simple to manage and deploy. However, if the C2 server is taken down or shut down, the entire botnet can collapse. P2P botnets, on the other hand, are more resilient and offer a better balance between control and flexibility.
Signs of a botnet infection include a sluggish computer that takes longer to open apps or perform tasks and a high data usage, even when the device is not connected to the Internet. Using modern security solutions that include real-time protection, behavioral monitoring, and threat intelligence helps defend against botnets. It is also recommended to change default passwords on IoT gear and regularly update operating systems, applications, and firmware.