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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.
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 [1] 1990 First virus family to use polymorphic encryption 4K: 4096 DOS 1990-01 The first known MS-DOS-file-infector to use stealth 5lo: DOS 1992-10 Infects .EXE files only Abraxas: Abraxas5 DOS, Windows 95, 98 [1] 1993-04 Europe: ARCV group Infects COM file. Disk directory listing will be set to the system date and time when ...
Computer malware is every bit as scary as it sounds. Fortunately, when you understand what it is and how to prevent it, your computing experience becomes much less stressful.
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]
This is an accepted version of this page This is the latest accepted revision, reviewed on 26 December 2024. Computer program that modifies other programs to replicate itself and spread Hex dump of the Brain virus, generally regarded as the first computer virus for the IBM Personal Computer (IBM PC) and compatibles A computer virus is a type of malware that, when executed, replicates itself by ...
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.