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Virus hoax. A hoax pop-up message warning of a computer virus, on a Compaq laptop. A computer virus hoax is a message warning the recipients of a non-existent computer virus threat. The message is usually a chain e-mail that tells the recipients to forward it to everyone they know, but it can also be in the form of a pop-up window. [ 1][ 2]
A computer virus generally contains three parts: the infection mechanism, which finds and infects new files, the payload, which is the malicious code to execute, and the trigger, which determines when to activate the payload. [ 33] Infection mechanism. Also called the infection vector, this is how the virus spreads.
Hex dump of the Blaster worm, showing a message left for Microsoft co-founder Bill Gates by the worm's programmer. This timeline of computer viruses and worms presents a chronological timeline of noteworthy computer viruses, computer worms, Trojan horses, similar malware, related research and events.
A retrovirus is a type of virus that inserts a DNA copy of its RNA genome into the DNA of a host cell that it invades, thus changing the genome of that cell. [ 2] After invading a host cell's cytoplasm, the virus uses its own reverse transcriptase enzyme to produce DNA from its RNA genome, the reverse of the usual pattern, thus retro (backward).
Computer viruses generally require a host program. [11] The virus writes its own code into the host program. When the program runs, the written virus program is executed first, causing infection and damage. A worm does not need a host program, as it is an independent program or code chunk.
Leap - Mac OS X Trojan horse. Shamoon a wiper virus with stolen digital certificates destroyed over 35,000 computers owned by Saudi Aramco. Storm Worm - A Windows trojan horse that forms the Storm botnet. Stuxnet First destructive ICS -targeting Trojan which destroyed part of Iran 's nuclear program.
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