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Metamorphic code is used by some viruses when they are about to infect new files, and the result is that the next generation will never look like current generation. The mutated code will do exactly the same thing (under the interpretation used), but the child's binary representation will typically be completely different from the parent's.
Polymorphic, Macro virus 1999-06-03 Sam Rogers Infects Word Documents Simile: Etap, MetaPHOR Windows Polymorphic The Mental Driller The metamorphic code accounts for around 90% of the virus' code SMEG engine: DOS Polymorphic 1994 United Kingdom: The Black Baron Two viruses were created using the engine: Pathogen and Queeg. Stoned: DOS Boot ...
The first known polymorphic virus was written by Mark Washburn. The virus, called 1260, was written in 1990. A better-known polymorphic virus was created in 1992 by the hacker Dark Avenger as a means of avoiding pattern recognition from antivirus software. A common and very virulent polymorphic virus is the file infecter Virut.
They constantly scan your device for known malware signatures and suspicious behavior patterns, thus providing real-time protection. When exploring the functionality of security software, dig ...
Oligomorphic code, also known as semi-polymorphic code, is a method used by a computer virus to obfuscate its decryptor by generating different versions of it, in order to evade detection by antivirus software. It is similar to, but less sophisticated than, polymorphic code. [1]
Although the signature-based approach can effectively contain malware outbreaks, malware authors have tried to stay a step ahead of such software by writing "oligomorphic", "polymorphic" and, more recently, "metamorphic" viruses, which encrypt parts of themselves or otherwise modify themselves as a method of disguise, so as to not match virus ...
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