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SESK: Stuff Everyone Should Know · sesk.info/aplus-rootkit-hide

Which type of malware is designed to hide itself and keep stealthy access to a host?

Rootkit.

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  1. Rootkit ✔
  2. Adware
  3. Cryptominer

Why: A rootkit is a set of files installed to change how a host works in a malicious and stealthy way. Because it hides so well, CompTIA lists OS reinstallation as a removal method.

Huh, didn't know that: NIST also describes rootkits as letting attackers keep root-level access through covert means.

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References

Answer: Rootkit. A rootkit is a set of files installed to change how a host works in a malicious and stealthy way. Because it hides so well, CompTIA lists OS reinstallation as a removal method.

  1. Rootkit, NIST CSRC glossary csrc.nist.gov/glossary/term/rootkit
    alter the standard functionality of the host in a malicious and stealthy way
    Checked 2026-10-11.
  2. CompTIA A+ Core 2 (220-1202) Exam Objectives v1.1 lecbyo.files.cmp.optimizely.com/download/84764f7a85ba11ef87e9da1cab964337
    OS reinstallation
    Checked 2026-10-11.

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