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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.
This is an accepted version of this page This is the latest accepted revision, reviewed on 7 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 ...
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 ...
Mark Washburn, working on an analysis of the Vienna and Cascade viruses with Ralf Burger, develops the first family of polymorphic viruses, the Chameleon family. Chameleon series debuted with the release of 1260. [21] [22] [23] June: The Form computer virus is isolated in Switzerland. It would remain in the wild for almost 20 years and reappear ...
The first known virus using oligomorphic code was the Whale DOS virus, identified in 1990, which chose from a few dozen distinct decryptors. The first Windows 95 virus using oligomorphic code was the Memorial virus, which could generate 96 distinct decryptor patterns. Another example is the Russian virus family WordSwap. [1]
Sality is a family of polymorphic file infectors, which target Windows executable files with the extensions .EXE or .SCR. [1] Sality utilizes polymorphic and entry-point obscuring (EPO) techniques to infect files using the following methods: not changing the entry point address of the host, and replacing the original host code at the entry point of the executable with a variable stub to ...
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.
Some new viruses, particularly ransomware, use polymorphic code to avoid detection by virus scanners. Jerome Segura, a security analyst with ParetoLogic, explained: [ 145 ] It's something that they miss a lot of the time because this type of [ransomware virus] comes from sites that use a polymorphism, which means they basically randomize the ...