W32.Alcra. F is a computer worm that is spread by P2P file sharing networks. It is regarded as a low-risk virus, [1] and is usually detected by a virus scan.
The W32.Alcra. F worm saves a number of empty files and links to a computer, and then attempts to connect to those links thus causing an error.
A full system scan usually can find, and remove this worm without much difficulty.
Klez is a computer worm that propagates via e-mail. It first appeared in October 2001 and was originated in China. A number of variants of the worm exist.
Sircam is a computer worm that first propagated in 2001 by e-mail in Microsoft Windows systems. It affected computers running Windows 95, Windows 98, and Windows Me (Millennium). It began with one of the following lines of text and had an attachment consisting of the worm's executable with some file from the infected computer appended:
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.
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. Upon clicking the message, the body reads, "Here's that document you asked for. Don't show anyone else ;)." Attached is a Word document titled "list.doc," containing a list of pornographic sites and accompanying logins for each. It then mass-mails itself to the first fifty people in the user's contact list and disables multiple safeguard features on Microsoft Word and Microsoft Outlook.
Blaster was a computer worm that spread on computers running operating systems Windows XP and Windows 2000 during August 2003.
Agobot, also frequently known as Gaobot, is a family of computer worms. Axel "Ago" Gembe, a German programmer also known for leaking Half-Life 2 a year before release, was responsible for writing the first version. The Agobot source code describes it as: “a modular IRC bot for Win32 / Linux”. Agobot was released under version 2 of the GNU General Public License. Agobot is a multi-threaded and mostly object oriented program written in C++ as well as a small amount of assembly. Agobot is an example of a Botnet that requires little or no programming knowledge to use.
The Sober worm is a family of computer worms that was discovered on October 24, 2003. Like many worms, Sober sends itself as an e-mail attachment, fake webpages, fake pop-up ads, and fake advertisements.
The Nimda virus is a malicious file-infecting computer worm. It quickly spread, surpassing the economic damage caused by previous outbreaks such as Code Red.
W32.Navidad is a mass-mailing worm program or virus, discovered in December 2000 that ran on Windows 95, Windows 98, Windows NT, and Windows 2000 systems. It was designed to spread through email clients such as Microsoft Outlook while masquerading as an executable electronic Christmas card. Infected computers can be identified by blue eye icons which appear in the Windows system tray.
Brontok is a computer worm running on Microsoft Windows. It is able to disperse by e-mail. Variants include:
RavMonE, also known as RJump, is a Trojan that opens a backdoor on computers running Microsoft Windows. Once a computer is infected, the virus allows unauthorized users to gain access to the computer's contents. This poses a security risk for the infected machine's user, as the attacker can steal personal information, and use the computer as an access point into an internal network.
ContraVirus is a rogue spyware application that poses as a legitimate anti-spyware program. The application uses a false scanner to force computer users to pay for the removal of non-existent spyware items. It may also be known as ExpertAntivirus.
W32.Gammima.AG is a computer worm that was detected by NASA on computers in space aboard the International Space Station (ISS) in August 2007. The virus, a gaming virus made to steal login information for net-based computer games, did not pose any threat to the ISS.
Koobface is a network worm that attacks Microsoft Windows, Mac OS X, and Linux platforms. This worm originally targeted users of networking websites like Facebook, Skype, Yahoo Messenger, and email websites such as GMail, Yahoo Mail, and AOL Mail. It also targets other networking websites, such as MySpace, Twitter, and it can infect other devices on the same local network. Technical support scammers also fraudulently claim to their intended victims that they have a Koobface infection on their computer by using fake popups and using built-in Windows programs.
Conficker, also known as Downup, Downadup and Kido, is a computer worm targeting the Microsoft Windows operating system that was first detected in November 2008. It uses flaws in Windows OS software and dictionary attacks on administrator passwords to propagate while forming a botnet, and has been unusually difficult to counter because of its combined use of many advanced malware techniques. The Conficker worm infected millions of computers including government, business and home computers in over 190 countries, making it the largest known computer worm infection since the 2003 SQL Slammer worm.
Daprosy worm was a malicious computer program that spreads via local area network (LAN) connections, spammed e-mails and USB mass storage devices. Infection comes from a single read1st.exe file where several dozen clones are created at once bearing the names of compromised folders. The most obvious symptom of Daprosy infection is the presence of Classified.exe or Do not open - secrets!.exe files from infected folders.
The BuluBebek virus is a computer worm that was first discovered on October 10, 2008. The virus is not exceptionally widespread, but rather has only infected small groups of computers. Related to the Kenshin, Doraemon, and Naturo viruses, the virus has infected computers in various parts of the world. It is written in a high level programming language, known as Visual Basic. The virus is only 53 KB in size and creates two files on the computers it infects, an EXE file and an INF file.
Gruel, also referred to by F-Secure as Fakerr, was a worm first surfacing in 2003 targeting Microsoft Windows platforms such as Windows 9x, Windows ME, Windows 2000 and Windows XP. It spread via email and file sharing networks.
Agent.BTZ, also named Autorun, is a computer worm that infects USB flash drives with spyware. A variant of the SillyFDC worm, it was used in a massive 2008 cyberattack on the US military, infecting 300,000 computers.