polymorphic virus

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• polymorphic virus — polimorfinis virusas statusas T sritis informatika apibrėžtis ↑Kompiuterių virusas, kuris plisdamas gali keisti savo baitų seką tam, kad ↑antivirusinės programos negalėtų jo atpažinti. Kai kurie polimorfiniai virusai pakeičia net savo šifravimo… …   Enciklopedinis kompiuterijos žodynas

• polymorphic virus —    A form of virus that can change its appearance to avoid detection. The virus encrypts itself using a special formula each time an infection occurs.    Virus detecting software uses special scanning techniques to find and remove polymorphic… …   Dictionary of networking

• Polymorphic code — In computer terminology, polymorphic code is code that mutates while keeping the original algorithm intact. This technique is sometimes used by computer viruses, shellcodes and computer worms to hide their presence. Most anti virus software and… …   Wikipedia

• virus —    A program intended to damage a computer system without the user s knowledge or permission.    A virus clones itself from disk to disk or from system to system over a network.    Numbers are hard to come by, but certain authorities claim that… …   Dictionary of networking

• Polymorphic engine — A polymorphic engine (sometimes called mutation engine or mutating engine) is a computer program that can be used to transform another program into a version that consists of different code with the same functionality. A typical polymorphic… …   Wikipedia

• Computer virus — Not to be confused with Malware. A computer virus is a computer program that can replicate itself[1] and spread from one computer to another. The term virus is also commonly but erroneously used to refer to other types of malware, including but… …   Wikipedia

• multipart virus —    A form of virus that infects both the boot sector of a hard disk and executable files. Multipart viruses are difficult to locate because they use stealth and polymorphic techniques to avoid detection.    See also boot sector virus; file… …   Dictionary of networking

• boot sector virus —    A virus that infects the master boot record of a computer by overwriting the original boot code with infected boot code. This kind of virus is usually spread to a hard disk from an infected floppy disk being used as a boot disk.    See also… …   Dictionary of networking

• file-infecting virus —    Any virus that infects files on disk, usually executable files with filename extensions of .COM, .EXE, and .OVL. An unexpected change in the file size may indicate an infection. In certain cases, the original program is replaced with a new… …   Dictionary of networking

• macro virus —    An executable program that attaches itself to a document created in Microsoft Word or Excel. When you open the document and execute the macro, the virus runs and does whatever damage it was programmed to do.    See also boot sector virus; file …   Dictionary of networking

• stealth virus —    A form of virus that attempts to hide from antivirus software and from the operating system by remaining in memory.    See also boot sector virus; file infecting virus; macro virus; multipart virus; polymorphic virus; Trojan Horse; vaccine …   Dictionary of networking