A rootkit is a type of malicious software (malware) that is designed to gain unauthorized access to a computer system and maintain that access while remaining hidden from the user and system administrators. Rootkits are typically used to gain access to a system for the purpose of stealing sensitive information, disrupting system operations, or installing other malicious software.
Rootkits are typically difficult to detect and remove, as they are designed to evade detection by traditional security software. They can be installed in a number of ways, including through vulnerabilities in software or operating systems, through social engineering techniques, or through the exploitation of weak passwords.
Rootkits typically operate by modifying the system's kernel or by installing themselves as kernel-level drivers. This allows them to bypass security measures and operate at a level of the system that is not normally accessible to the user.
To detect and remove rootkits, specialized security software and techniques may be required. It is generally recommended to keep the operating system and software up to date, use strong passwords, and be cautious when installing software or clicking on links to prevent rootkits from being installed on a system.