Stealth Virus

What Does Stealth Virus Mean?

A stealth virus is a hidden computer virus that attacks operating system processes and averts typical anti-virus or anti-malware scans. Stealth viruses hide in files, partitions and boot sectors and are adept at deliberately avoiding detection.

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Stealth virus eradication requires advanced anti-virus software or a clean system reboot.

Techopedia Explains Stealth Virus

Stealth viruses hide altered computer data and other harmful control functions in system memory and self-copy to undetectable computer areas, effectively tricking anti-virus software. In order to avoid detection, stealth viruses also self-modify in the following ways:

  • Code Modification: The stealth virus changes the code and virus signature of each infected file.
  • Encryption: The stealth virus encrypts data via simple encryption and uses a different encryption key for each infected file.

Brain, the first stealth virus, spread internationally during the mid-1980s.

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Margaret Rouse

Margaret Rouse is an award-winning technical writer and teacher known for her ability to explain complex technical subjects to a non-technical, business audience. Over the past twenty years her explanations have appeared on TechTarget websites and she's been cited as an authority in articles by the New York Times, Time Magazine, USA Today, ZDNet, PC Magazine and Discovery Magazine.Margaret's idea of a fun day is helping IT and business professionals learn to speak each other’s highly specialized languages. If you have a suggestion for a new definition or how to improve a technical explanation, please email Margaret or contact her…