Malware is any software intentionally designed to cause disruption to a computer, server, client, or computer network, leak private information, gain unauthorized access to information or systems, deprive access to information, or which unknowingly interferes with the user's computer security and privacy. Researchers tend to classify malware into one or more sub-types.
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.
McAfee Corp., formerly known as McAfee Associates, Inc. from 1987 to 1997 and 2004 to 2014, Network Associates Inc. from 1997 to 2004, and Intel Security Group from 2014 to 2017, is an American global computer security software company headquartered in San Jose, California.
Antivirus software, also known as anti-malware, is a computer program used to prevent, detect, and remove malware.
ESET, s.r.o., is a software company specializing in cybersecurity. ESET's security products are made in Europe and provide security software in over 200 countries and territories worldwide. Its software is localized into more than 30 languages.
Norton AntiVirus is an anti-virus or anti-malware software product founded by Peter Norton, developed and distributed by Symantec since 1990 as part of its Norton family of computer security products. It uses signatures and heuristics to identify viruses. Other features included in it are e-mail spam filtering and phishing protection.
Avast Software s.r.o. is a Czech multinational cybersecurity software company headquartered in Prague, Czech Republic, that researches and develops computer security software, machine learning, and artificial intelligence. Avast has more than 435 million monthly active users and the second largest market share among anti-malware application vendors worldwide as of April 2020. The company has approximately 1,700 employees across its 25 offices worldwide. In July 2021, NortonLifeLock, an American cybersecurity company, announced that it was in talks to merge with Avast Software. In August 2021, Avast's board of directors agreed to an offer of US$8 billion.
CARO is an organization that was established in 1990 to research and study malware.
Kaspersky Anti-Virus is a proprietary antivirus program developed by Kaspersky Lab. It is designed to protect users from malware and is primarily designed for computers running Microsoft Windows and macOS, although a version for Linux is available for business consumers.
The Storm Worm is a phishing backdoor Trojan horse that affects computers using Microsoft operating systems, discovered on January 17, 2007. The worm is also known as:
Webroot Inc. is an American privately-held cybersecurity software company that provides Internet security for consumers and businesses. The company was founded in Boulder, Colorado, US, and is now headquartered in Broomfield, Colorado, and has US operations in San Mateo and San Diego, and globally in Australia, Austria, Ireland, Japan and the United Kingdom.
VBA32 is antivirus software from the vendor VirusBlokAda for personal computers running Microsoft Windows. It detects and neutralizes computer viruses, computer worms, Trojan horses and other malware in real time and on demand.
VirusTotal is a website created by the Spanish security company Hispasec Sistemas. Launched in June 2004, it was acquired by Google in September 2012. The company's ownership switched in January 2018 to Chronicle, a subsidiary of Google.
Microsoft Security Essentials (MSE) was an antivirus software (AV) product that provides protection against different types of malicious software, such as computer viruses, spyware, rootkits, and Trojan horses. Prior to version 4.5, MSE ran on Windows XP, Windows Vista, and Windows 7, but not on Windows 8 and later versions, which have built-in AV components known as Windows Defender. MSE 4.5 and later versions do not run on Windows XP. The license agreement allows home users and small businesses to install and use the product free of charge. It replaces Windows Live OneCare, a discontinued commercial subscription-based AV service, and the free Windows Defender, which only protected users from spyware until Windows 8.
Malwarebytes Inc. is an American Internet security company that specializes in protecting home computers, smartphones, and companies from malware and other threats. It has offices in Santa Clara, California; Clearwater, Florida; Tallinn, Estonia; Bastia Umbra, Italy; and Cork, Ireland.
Magic Lantern is keystroke logging software created by the United States' Federal Bureau of Investigation (FBI). Magic Lantern was first reported in a column by Bob Sullivan of MSNBC on November 20, 2001 and by Ted Bridis of the Associated Press.
Kaspersky Lab is a Russian multinational cybersecurity and anti-virus provider headquartered in Moscow, Russia, and operated by a holding company in the United Kingdom. It was founded in 1997 by Eugene Kaspersky, Natalya Kaspersky and Alexey De-Monderik. Kaspersky Lab develops and sells antivirus, internet security, password management, endpoint security, and other cybersecurity products and services.
Avira Operations GmbH & Co. KG is a German multinational computer security software company mainly known for its Avira Free Security antivirus software. Although founded in 2006, the Avira antivirus application has been under active development since 1986 through its predecessor company H+BEDV Datentechnik GmbH. Since 2021, Avira has been owned by American software company NortonLifeLock, which also operates Norton, Avast and AVG. It was previously owned by investment firm Investcorp.
G Data CyberDefense AG is a German software company that focuses on computer security. The company was founded in 1985 and is headquartered in Bochum. They are known for being the creators of the world's first antivirus software. G Data uses multiple scanning engines; one is developed in-house and the other is the Bitdefender engine. G Data provides several security products that are targeted at home and business markets. The company has a North American subsidiary located in Newark, Delaware.
Norton, formerly known as Norton by Symantec, is a brand of Gen Digital co-headquartered in Tempe, Arizona and Prague, Czech Republic. Norton originally provided utility software for DOS, and currently offers a variety of products and services related to digital security, identity protection, and online privacy and utilities.
€111.0 million (2022) [2] 
