What is a polymorphic virus?

by | Feb 11, 2021 | CompTIA, End Point Protection, Exclusive Articles, Featured, Malware Prevention

Polymorphic Virus

What is a polymorphic virus?

Traditional anti-virus programs use signature-based detection methods to detect a virus. It looks for a signature or bit-pattern in a virus to detect the virus. When we scan a computer, the anti-virus program looks into each file and match it with a database of known signatures. The anti-virus program can detect a virus if it finds a known signature in an infected file.

A polymorphic virus is a virus that changes its form each time it infects a new target. As a result, a polymorphic virus does not have any specific bit-pattern or signature associated with it. And, as traditional anti-virus programs rely on signatures to detect a virus, these anti-virus programs cannot detect a polymorphic virus.


In this article, we would discuss:

  • What is a polymorphic virus?

  • How does a polymorphic virus work?

  • How to detect a polymorphic virus?

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Amrita Mitra

Author

Ms. Amrita Mitra is an author, who has authored the books “Cryptography And Public Key Infrastructure“, “Web Application Vulnerabilities And Prevention“, “A Guide To Cyber Security” and “Phishing: Detection, Analysis And Prevention“. She is also the founder of Asigosec Technologies, the company that owns The Security Buddy.

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