Polymorphic code: Difference between revisions

Revision as of 12:06, 23 November 2017

Revision as of 12:08, 23 November 2017

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The encrypted code is the payload. To make different versions of the code, in each copy the garbage lines which manipulate C will change. The code inside "Encrypted" ("lots of encrypted code") can search the code between Decryption_Code and CryptoKey and each algorithm for new code that does the same thing. Usually the coder uses a zero key (for example; A [[xor]] 0 = A) for the first generation of the virus, making it easier for the coder because with this key the code is not encrypted. The coder then implements an incremental key algorithm or a random one.

==- Polymorphic encryption ==

Polymorphic code can be also used to generate encryption algorithm. This code was generated by the online service StringEncrypt.<ref name="stringencrypt">[https://www.stringencrypt.com Wójcik, Bartosz (2015). ''String & File Encryption'']</ref> It takes the string or a file content and encrypts it with random encryption commands and generates polymorphic decryption code in one of the many supported programming languages:

<source lang="cpp">