What is a Botnet?
A Botnet is a network of computers and other devices infected with malware that allows a cybercriminal to control them remotely without the owner’s knowledge or consent. Thousands or millions of infected devices (zombie computers) can be controlled by one bot-herder at a time, allowing the attacker to perform large scale cyber attacks such as DDoS attacks, spamming, cryptocurrency mining, and more.
These devices are typically infected with malware through phishing emails, malicious downloads, or security vulnerabilities like software bugs. IoT devices with default credentials, like routers and home cameras, can be especially vulnerable to this type of attack. A well-known example is the Mirai botnet that caused widespread DDoS attacks on companies such as Krebs on Security, Github, and DNS provider Dyn.
There are different kinds of Botnets based on their structure, but the intention is always to steal information or money from the victim. The stolen data can then be sold on the dark web for other criminals to use, or used as a tool to launch large-scale cyberattacks like DDoS attacks and extortion.
To prevent getting hacked, keep your operating systems, applications, and firmware up to date. Use a reputable antivirus and anti-malware solution that provides real-time protection with behavioral monitoring and threat intelligence to identify unknown threats early. Change your passwords regularly and consider using two-factor authentication.