Computer viruses are small software programs or a small
code that are designed to distract computer user by spreading from one computer
to another and to interfere with computer operations.
Here are the lists of Top 10 Worst Computer Viruses for
2013
Sassar
Sasser is a computer worm that affects computers running
vulnerable versions of the Microsoft operating systems Windows XP and Windows
2000. Sasser spreads by exploiting the system through a vulnerable network port
(as do certain other worms).
Storm worm
The Storm Worm is a backdoor Trojan horse that affects
computers using Microsoft operating systems discovered on January 17, 2007.
PGP Coder
Pretty Good Privacy. Considered the strongest program for
encrypting data files and/or e-mail messages on PCs and Macintosh computers.
PGP includes authentication to verify the sender of a message and
non-repudiation to prevent someone denying they sent a message.
OSX/RSPlug Trojan
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.
Slammer
The SQL Slammer virus, which affects Microsoft SQL, then
you simply need to get the appropriate patches
installed on your systems to protect against this vulnerability. Having a
firewall and anti-virus software is not enough, you need to be proactively
updating your systems on a regular basis to remediate vulnerabilities before
they can be attacked.
The 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.
The Melissa virus
The Melissa virus, also known as "Mailissa",
"Simpsons", "Kwyjibo", or "Kwejeebo", is a mass-mailing
macro virus. As it is not a standalone program, it is not a worm first found on
March 26, 1999
ILOVEYOU
ILOVEYOU, sometimes referred to as Love Letter, was a
computer worm that attacked tens of millions of Windows personal computers on
and after 5 May 2000[1] 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 Anna Kournikova worm
A computer worm authored by the Dutch programmer Jan de Wit on February 11, 2001. It was
designed to trick email users into opening a mail message purportedly
containing a picture of tennis player Anna Kournikova, while actually hiding a
malicious program.
The 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.
