Most-Destructive Computer Viruses 2

Most-Destructive Computer Viruses 2

RSPlug
The RSPlug Trojan horse, a form of DNSChanger, is malware targeting the Mac OS X operating system. The first incarnation of the trojan, OSX.RSPlug.A, was discovered on October 30, 2007 by the Mac security experts at Intego.

Storm Worm
The Storm Worm (dubbed so by the Finnish company F-Secure) is a backdoor Trojan horse that affects computers using Microsoft operating systems discovered on January 17, 2007.

Fizzer
Fizzer is a multiple vector worm that topped virus/worm charts in 2003. It was comparable to Nimda in a few ways, as it "infected" files like a virus and had more than one way of spreading.

SQL Slammer
SQL Slammer is a computer worm that caused a denial of service on some Internet hosts and dramatically slowed down general Internet traffic, starting at 05:30 UTC on January 25, 2003. It spread rapidly, infecting most of its 75,000 victims within ten minutes.

Blaster Worm
The Blaster Worm (also known as Lovsan, Lovesan or MSBlast) was a computer worm that spread on computers running the Microsoft operating systems: Windows XP and Windows 2000, during August 2003.

Code Red
Code Red was a computer worm observed on the Internet on July 13, 2001. It attacked computers running Microsoft's IIS web server.The Code Red worm was first discovered and researched by eEye Digital Security employees Marc Maiffret and Ryan Permeh.

ILOVEYOU
ILOVEYOU,  Love Letter, was a computer worm that attacked tens of millions of Windows personal computers on and after 5 May 2000 local time in the Philippines when it started spreading as an email message with the subject line "ILOVEYOU" and the attachment "LOVE-LETTER-FOR-YOU.txt.vbs". The latter file extension (in this case, 'VBS' - a type of interpreted file) was most often hidden by default on Windows computers of the time, leading unwitting users to think it was a normal text file. Opening the attachment activated the Visual Basic script. The worm did damage on the local machine, overwriting image files, and sent a copy of itself to the first 50 addresses in the Windows Address Book used by Microsoft Outlook.

Concept virus

The name Concept virus refers to two different pieces of computer malware, each of which has acted as a proof of concept for a new method of propagation:WM.Concept (1995), the first macro virus to spread through Microsoft Word (though not the first macro virus per-se)Nimda (2001), named Concept Virus by its author, one of the first multi-vector Windows viruses.

Morris worm
The Morris worm or Internet worm of November 2, 1988 was one of the first computer worms distributed via the Internet. It is considered the first worm and was certainly the first to gain significant mainstream media attention. It also resulted in the first conviction in the US under the 1986 Computer Fraud and Abuse Act.It was written by a student at Cornell University, Robert Tappan Morris, and launched on November 2, 1988 from MIT.

Spacefiller
CIH, also known as Chernobyl or Spacefiller, is a Microsoft Windows computer virus which first emerged in 1998. It is one of the most damaging viruses, overwriting critical information on infected system drives, and more importantly, in some cases corrupting the system BIOS. The virus was created by Chen Ing-hau who was a student at Tatung University in Taiwan.60 million computers were believed to be infected by the virus internationally, resulting in an estimated $1 billion US dollars in commercial damages.