Archive for the ‘Virus and Antivirus’ Category
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A massive attack that is trying to scare computer users into visiting a bogus antivirus site has infected more than 1.5 million websites and continues to spread, according to an Internet security firm.
Several pages on Apple’s iTunes store have been infected.
The so-called LizaMoon “SQL injection attack” began Tuesday and is being tracked by Websense. Such attacks redirect users by exploiting programming errors and poorly written code and scripts.
eWeek says the attack is “out of control … with no end in sight.” Nearly half the compromised sites are in the United States. Other affected countries include United Kingdom, Kuwait, India, Australia, Turkey, Brazil, Israel, Mexico, Taiwan and Chile.
Viruses are categorized by how they infect computers. Some viruses fall into more than one of these categories.
Types of viruses include:
- Polymorphic Viruses – Polymorphic viruses change characteristics as they infect a computer.
- Stealth Viruses - Stealth viruses actively try to hide themselves from anti-virus and system software.
- Fast and Slow Infectors - Fast and Slow viruses infect a computer in a particular way to try to avoid being detected by anti-virus software.
- Sparse Infectors – Sparse Infectors don’t infect very often.
- Armored Viruses – Armored viruses are programmed to make eradication difficult.
- Multipartite Viruses – Multipartite Viruses are viruses that may fall into more than one of these categories.
- Cavity (Spacefiller) Viruses – Cavity (Spacefiller) viruses attempt to maintain a constant file size when infecting a computer in order to try to avoid detection.
- Tunneling Viruses – Tunneling viruses try to “tunnel” under anti-virus software while infecting.
- Camouflage Viruses – Camouflage viruses attempt to appear as a benign program.
- Virus Droppers – Virus Droppers are a special category of programs that place viruses on computers but are not by themselves an actual virus.
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1 ) Jerusalem – 1987
This is one of the first MS-DOS viruses in history that caused enormous destructions, affecting many countries, universities and company worldwide. On Friday 13, 1988 the computer virus managed to infect a number of institutions in Europe, America and the Middle East. The name was given to the virus after one of the first places that got “acquainted” with it – the Jerusalem University.
More info: Jerusalem computer virus
2 ) Morris (a.k.a. Internet Worm) – November 1988
Previously at www.InfoNIAC.com we wrote about this computer worm, which is believed to be one of the first worms that spread over the Internet. The name of the virus comes from its developer Robert Tappan Morris, who was a student at Cornell University. The computer worm was set off on November 2, 1988 and after some time it managed to infect 6,000 to 9,000 machines.
More info: Morris worm
3) Solar Sunrise – 1998
Two Californian teenagers took American government by surprise, in 1998, when they intruded and took control of around 500 systems that belonged to the governmental as well as private sector. This was done with the help of a computer virus and the situation was given the name of Solar Sunrise, after an operating system called Sun Solaris.
More Info: Solar Sunrise
4) Melissa – 1999
More info: Melissa virus
5) I Love You – May 2000
6) Nimda – 2001
Nimda is a computer worm, and is also a file infector. It quickly spread, eclipsing the economic damage caused by past outbreaks such as Code Red. Multiple propagation vectors allowed Nimda to become the Internet’s most widespread virus/worm within 22 minutes. The worm was released on September 18, 2001. Nimda was considered to be one of the most complicated viruses, having up to 5 different methods of infecting computers systems and duplicating itself.
7) The Code Red worm – July 2001
More info: The Code Red worm
8) Blaster – 2003
9) Sasser (2004)
10) Downadup – 2009
The latest and most dangerous virus is the “downadup” worm, which was also called “Conficker”. The computer security company F-Secure stated that the computer virus has infected 3.5 million computers worldwide. This malicious program was able to spread using a patched Windows flaw.