A botnet, short for “robot network,” is a network of compromised computers, often referred to as “” or “[zombies],” that are under the control of a single entity, the . These compromised computers are typically infected with malicious software, known as , which allows the botmaster to control them remotely. Botnets are frequently used to launch DDoS attacks, overwhelming a target’s servers or network infrastructure with a flood of traffic, rendering it to users. In a botnet-powered DDoS attack, a network of compromised computers floods a target with overwhelming to disrupt its services.
Botnets use compromised computers to send out large volumes of emails. The botmaster controls these infected computers, issuing commands for email content and distribution. Spam emails often contain attempts or malware, and techniques like email spoofing make it challenging to filter out malicious emails. Additionally, botnets infect computers and use techniques like to steal usernames and passwords. Stolen credentials are sent to a central server, where they may be sold or used for unauthorized access and financial gain.
Botnets are also involved in fraud, where infected computers generate automated clicks on online advertisements. This fraudulent activity aims to inflate ad revenue at the expense of who pay for clicks that lack genuine user interest. Furthermore, botnets provide proxy services, allowing malicious actors to their online activities. Compromised computers within the botnet act as proxies, relaying internet traffic on behalf of the user, which can be exploited for various illicit purposes, including hiding the origin of cyberattacks.
