A botnet, short for “robot network,” is a network of compromised , often referred to as “bots” 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 attacks, overwhelming a target’s servers or network infrastructure with a flood of traffic, rendering it unavailable to users. In a botnet-powered DDoS attack, a network of compromised computers floods a target with overwhelming traffic 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, making it challenging to filter out malicious emails. Botnets can also steal usernames and passwords using techniques like . Stolen credentials are sent to a central server, where they may be sold or used for unauthorized access and financial gain. Additionally, botnets generate automated clicks on online , a practice known as click fraud, which aims to inflate ad revenue at the expense of advertisers.
Moreover, botnets are used to provide services, allowing malicious actors to anonymize their online activities. Compromised computers within the botnet act as proxies, relaying internet traffic on behalf of the user. This service can be exploited for various illicit purposes, including hiding the origin of cyberattacks and facilitating unauthorized access to online resources. Botnet data theft involves extracting sensitive information such as personal data and credentials using malware to control compromised devices. The stolen data is then sent back to the attacker's central .
Finally, botnet cryptojacking involves using a network of compromised computers to secretly mine without the owners' knowledge. Malicious actors deploy malware on these devices, turning them into mining tools that contribute computing power.
