Polymorphic engine

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A polymorphic engine (sometimes called mutation engine or mutating engine) is a software component that uses polymorphic code to alter the payload while preserving the same functionality.

Polymorphic engines are used almost exclusively in malware, with the purpose of being harder for antivirus software to detect. They do so either by encrypting or obfuscating the malware payload.

One common deployment is a file binder that weaves malware into normal files, such as office documents. Since this type of malware is usually polymorphic, it is also known as a polymorphic packer.

The engine of the Virut botnet is an example of a polymorphic engine.^[1]

References

^ "The most polymorphic virus around today". Kasperky. 26 May 2021. Retrieved 2022-04-17.

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Polymorphic engine

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