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A computer virus [1] is a type of malware that, when executed, replicates itself by modifying other computer programs and inserting its own code into those programs. [2] [3] If this replication succeeds, the affected areas are then said to be "infected" with a computer virus, a metaphor derived from biological viruses.
Melissa (computer virus) The Melissa virus is a mass-mailing macro virus released on or around March 26, 1999. It targets Microsoft Word and Outlook -based systems and created considerable network traffic. The virus infects computers via email; the email is titled "Important Message From," followed by the current username.
Stuxnet is a malicious computer worm first uncovered in 2010 and thought to have been in development since at least 2005. Stuxnet targets supervisory control and data acquisition ( SCADA) systems and is believed to be responsible for causing substantial damage to the nuclear program of Iran. [2]
Replication follows the positive stranded RNA virus replication model. Positive stranded rna virus transcription is the method of transcription. The virus exits the host cell by tubule-guided viral movement. Plants serve as the natural host. The virus is transmitted via a vector (beetle). Transmission routes are vector and mechanical.
Schematic drawing of a virion of genus Mimivirus (cross section and side view) showing filaments ("hairs") and stargate (downside) Mimivirus is a genus of giant viruses, in the family Mimiviridae. Amoeba serve as their natural hosts. [2] [3] This genus contains a single identified species named Acanthamoeba polyphaga mimivirus (APMV).
EICAR test file. The EICAR Anti-Virus Test File [1] or EICAR test file is a computer file that was developed by the European Institute for Computer Antivirus Research (EICAR) and Computer Antivirus Research Organization (CARO) to test the response of computer antivirus (AV) programs. [2] Instead of using real malware, which could cause real ...
Zip bomb. In computing, a zip bomb, also known as a decompression bomb or zip of death (ZOD), is a malicious archive file designed to crash or render useless the program or system reading it. The older the system or program, the more likely it is to fall for it. It is often employed to disable antivirus software, in order to create an opening ...
Negative-sense RNA viruses (NSVs) [note 1] Negative-strand RNA viruses ( −ssRNA viruses) are a group of related viruses that have negative-sense, single-stranded genomes made of ribonucleic acid (RNA). They have genomes that act as complementary strands from which messenger RNA (mRNA) is synthesized by the viral enzyme RNA-dependent RNA ...