What is a "rootkit" in the context of cybersecurity?

A rootkit is a type of malicious software specifically designed to gain unauthorized access to a computer system while remaining hidden from the user and security software. This tool allows an attacker to take control of the system, manipulate its functions, and evade detection. Rootkits can alter system settings, install additional malware, and access sensitive data without the user's consent.

By its nature, a rootkit operates at a low level within the operating system, which makes it particularly difficult to detect and remove. Its stealthiness and ability to maintain persistent access to a system are what make rootkits particularly dangerous. These characteristics distinguish rootkits from other types of software, such as antivirus programs, system optimization tools, or data recovery methods, which have entirely different purposes and functionalities.