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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 ...
Metamorphic code techniques may be used to complicate detection further, as the virus may execute without ever having identifiable code blocks in memory that remains constant from infection to infection. The first known polymorphic virus was written by Mark Washburn. The virus, called 1260, was written in 1990.
Malware refers to several different types of malicious software created by cybercriminals to gain access to your devices and steal personal information or cause damage. Read the information below ...
February 16: Discovery of the first-ever malware for Mac OS X, a low-threat trojan-horse known as OSX/Leap-A or OSX/Oompa-A, is announced. Late March: Brontok variant N was found in late March. [45] Brontok was a mass-email worm and the origin for the worm was from Indonesia. June: Starbucks is a virus that infects StarOffice and OpenOffice.
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.
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 ...
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]
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