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Thursday, October 20, 2011

Classification of Computer viruses



Viruses can be classified in a number of ways. One way of classifying them is as follows:
􀃡 Environment
􀃂 File Viruses
♦ Overwriting virus
♦ Parasitic virus or Cavity (space-filler) virus
♦ Companion virus
♦ File worms
♦ Link viruses or cluster viruses
♦ Source code viruses (OBJ, LIB viruses)
♦ Tunneling viruses
♦ Camouflage virus
􀃂 Boot viruses
♦ Parity boot
♦ Boot-and-file virus
♦ System sector virus
􀃂 Macro Viruses
􀃂 Network Viruses
􀃂 VB worms
􀃡 Operating system (OS)
􀃡 Different algorithms of work
􀃂 Terminate and stay resident (TSR) virus
􀃂 Stealth Algorithm
􀃂 Armored virus
􀃂 Polymorphic or self-encrypting capabilities
􀃂 Logic bombs 

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