Creeper virus was detected on ARPANET infecting the Tenex operating system. Creeper gained access independently through a modem and copied itself to the remote system where the message, 'I'M THE CREEPER : CATCH ME IF YOU CAN.' was displayed. The Reaper program, itself a virus, was created to delete Creeper. The creators of both programs are unknown.
Rabbit virus appears infecting other machines via multiplication. Named for the speed at which it clogged the system with copies of itself, reducing system performance, before reaching a threshold and crashing.
Pervading Animal was a game written for the UNIVAC 1108, was designed to ask a number of questions in an attempt to guess the type of animal that the user was thinking of. It would attempt to write itself to every writable program file, then marked that file with an illegal creation time so it could tell the difference between user and program created files. However, it remains a matter of debate whether Pervading Animal represented the first Trojan or an innocent game with unintended bugs.
Jürgen Kraus wrote master thesis Selbstreproduktion bei Programmen (Self-reproduction of programs) Warning: Downloads from this site may contain concept viruses.
A program called Elk Cloner, written for Apple II systems and created by Richard Skrenta. Apple II was seen as particularly vulnerable due to the storage of its operating system on Floppy disk. Elk Cloner's design combined with public ignorance about what malware was and how to protect against it led to Elk Cloner being responsible for the first large-scale computer virus outbreak in history.
The term 'virus' is coined by Frederick Cohen in describing self-replicating computer programs. In 1984 Cohen uses the phrase "computer virus" – as suggested by his teacher Leonard Adleman – to describe the operation of such programs in terms of "infection". He defines a 'virus' as "a program that can 'infect' other programs by modifying them to include a possibly evolved copy of itself."
November 10th, 1983, at Lehigh University, Cohen demonstrates a virus-like program on a VAX11/750 system. The program was able to install itself to, or infect, other system objects.
January: The Brain boot sector virus (aka Pakistani flu) is released to the wild. Brain is considered the first IBM PC compatible virus, and the program responsible for the first IBM PC compatible virus epidemic. The virus is also known as Lahore, Pakistani, Pakistani Brain, as it was created in Lahore, Pakistan by 19 year old Pakistani programmer, Basit Farooq Alvi and his brother Amjad Farooq Alvi.
December 1986: Ralf Burger presented the Virdem model of programs at a meeting of the underground Chaos Computer Club in Germany. The Virdem model represented the first programs that could replicate themselves via addition of their code to executable DOS files in COM format.
Appearance of the Vienna virus, which was subsequently neutralized- the first time this had happened on the IBM platform.
Appearance of Lehigh virus, boot sector viruses such as Yale from USA, Stoned from New Zealand, Ping Pong from Italy, and appearance of first self-encrypting file virus, Cascade. Lehigh was never released to the wild however. A subsequent infection of Cascade in the offices of IBM Belgium led to IBM responding with its own antivirus product development. Prior to this, antivirus solutions developed at IBM were intended for staff use only.
October: The Jerusalem virus, part of the (at that time unknown) Suriv family, is detected in the city of Jerusalem. Jerusalem destroys all executable files on infected machines upon every occurrence of Friday the 13th (except Friday the 13th Nov 1987 making its first trigger date May 13th 1988). Jerusalem caused a worldwide epidemic in 1988.
November: The SCA virus, a boot sector virus for Amigas appears, immediately creating a pandemic virus-writer storm. A short time later, SCA releases another, considerably more destructive virus, the Byte Bandit.
June: The Festering Hate Apple ProDOS virus spreads from underground pirate BBS systems and starts infecting mainstream networks.
November 2: The Morris worm, created by Robert Tappan Morris, infects DEC VAX and Sun machines running BSD UNIX connected to the Internet, and becomes the first worm to spread extensively "in the wild", and one of the first well-known programs exploiting buffer overrun
October 1989: Ghostball, the first multipartite virus, is discovered by Friðrik Skúlason
Mark Washburn working on an analysis of the Vienna and Cascade viruses with Ralf Burger develops the first family of polymorphic virus: the Chameleon family. Chameleon series debuted with the release of 1260.
Michelangelo was expected to create a digital apocalypse on March 6th, with millions of computers having their information wiped according to mass media hysteria surrounding the virus. Later assessments of the damage showed the aftermath to be minimal.
The "Concept virus" the first Macro virus is created
"Ply" - DOS 16-bit based complicated polymorphic virus appeared with built-in permutation engine.
June 2: The first version of the CIH virus appears.
March 26: The Melissa worm is released, targeting Microsoft Word and Outlook-based systems, and creating considerable network traffic.
June 6: The ExploreZip worm, which destroys Microsoft Office documents, is first detected.
The Happy99 worm invisibly attached itself to emails. Displayed fireworks to hide changes being made and wished you a happy new year. Modified system files related to Outlook Express and Internet Explorer on Windows 95 and Windows 98.
2000 and later
May: The VBS/Loveletter ('ILOVEYOU') worm appeared. As of 2004 this is the most costly virus to business, causing upwards of 10 billion dollars in damage. The backdoor trojan to the worm, Barok, was created by Filipino programmer Onel de Guzman; it is not known who created the attack vector or who (inadvertently) unleashed it; de Guzman himself denies being behind the outbreak although he suggests he may have been duped by someone using his own Barok code as a payload.
Zmist - a fully metamorphic, code integrating virus.
March: Simile - a multi-OS, metamorphic virus written in assembly language .
May 8: The Sadmind worm spreads by exploiting holes in both Sun Solaris and Microsoft IIS.
July: The Sircam worm is released, spreading through e-mails and unprotected network shares.
July 13: The Code Red worm attacking the Index Server ISAPI Extension in Microsoft Internet Information Services is released.
August 4: A complete re-write of the Code Red worm, Code Red II begins aggressively spreading, primarily in China.
September 18: The Nimda worm is discovered and spreads through a variety of means including vulnerabilities in Microsoft Windows and backdoors left by Code Red II and Sadmind worm.
October 26: The Klez worm is first identified.
January 24: The SQL slammer worm also known as the Sapphire worm, attacked vulnerabilities in Microsoft SQL Server and MSDE causes widespread problems on the Internet.
August 12: The Blaster worm, also known as the Lovesan worm, spread rapidly by exploiting a vulnerability in Microsoft Windows computers.
August 18: The Welchia (Nachi) worm is discovered. The worm tries to remove the blaster worm and patch Windows.
August 19: The Sobig worm (technically the Sobig.F worm) spread rapidly via mail and network shares.
October 24: The Sober worm is first seen and maintains its presence until 2005 with many new variants.
The simultaneous attack on network weakpoints by the Blaster and Sobig worms caused a
Late January: MyDoom emerges, and currently holds the record for the fastest-spreading mass mailer worm.
March 19: The Witty worm is a record-breaking worm in many regards. It exploited holes in several Internet Security Systems (ISS) products. It was the fastest disclosure to worm, it was the first internet worm to carry a destructive payload and it spread rapidly using a pre-populated list of ground-zero hosts.
May 1: The Sasser worm emerges by exploiting a vulnerability in LSASS and causes problems in networks, even interrupting business in some cases.
December: Santy, the first known "webworm" is launched. It exploited a vulnerability in phpBB and used Google in order to find new targets. It infected around 40000 sites before Google filtered the search query used by the worm, preventing it from spreading.
August 16: The Zotob worm and several variations of malware are discovered. The effect was overblown because several United States media outlets were infected.
October 13: The Samy XSS worm became the fastest spreading virus by some definitions as of 2006.
January 20: The Nyxem worm was discovered. It spread by mass-mailing. Its payload, which activates on the third of every month, starting on February 3, attempts to disable security-related and file sharing software, and destroy files of certain types, such as Microsoft Office files.
February 16: discovery of the first-ever virus for Mac OS X, a low-threat worm known as OSX/Leap-A or OSX/Oompa-A, is announced.
December Stration or Warezov worm first discovered.
January Storm Worm begins gathering infected computers into the Storm botnet, which comprised between 10 and 50 million computers by September.