variants or less commonly root kit
computers
: a malicious piece of software that grants a remote operator complete access to a computer system
Rootkits maliciously change a computer's operating system without a user's knowledge and then cover up their tracks. The hacker who installed the rootkit is then able to monitor the infected computer and use it to launch other attacks. Andrea Caumont

Examples of rootkit in a Sentence

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Security researchers have unmasked a campaign using both fake CAPTCHA tests and malicious downloads as the starting point for what quickly turns into an invisible rootkit attack that can cloak any malicious file, task or Windows registry entry that uses one specific prefix. Davey Winder, Forbes, 17 Mar. 2025 While the Secure Vault aims to enable a trusted environment, Secure AI is an inference processor that is tasked with detecting and blocking attacks by looking for suspicious behavior, such as the very low-level rootkit attacks previously mentioned. Matt Kimball, Forbes, 6 Dec. 2024

Word History

First Known Use

1994, in the meaning defined above

Time Traveler
The first known use of rootkit was in 1994

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Cite this Entry

“Rootkit.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/rootkit. Accessed 26 Mar. 2025.

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