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Armored Virus
Desigend to make it difficult to detect or analyze
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Campanion Virus
Attaches itself to legitimate programs and creates a program with a different filename extension, may update registry to point to the infected file
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Macro Virus
Word, Excel etc. exploits enhancements made to many application programs
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Multipartite Virus
Attacks in multiple ways, boot sector, executable files, destroy app files
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Phage Virus
modifies and alters other programs and databases. Infects all of these files, must restore programs
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Polymorphic Virus
Changes form to avoid detection. Mutations
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Retrovirus
Attacks or bypasses the antivirus software, anti-antivirus, could destroy virus definition database file.
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Stealth Virus
Attempts to avoid detection by masking itself, may attach to the boot sector, may report different size toavoid detection, make switch files during virus scan
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