A computer worm is a standalone malware computer program that replicates itself in order to spread to other computers. It often uses a computer network to spread itself, relying on security failures on the target computer to access it. It will use this machine as a host to scan and infect other computers. When these new worm-invaded computers are controlled, the worm will continue to scan and infect other computers using these computers as hosts, and this behaviour will continue. Computer worms use recursive methods to copy themselves without host programs and distribute themselves based on exploiting the advantages of exponential growth, thus controlling and infecting more and more computers in a short time. Worms almost always cause at least some harm to the network, even if only by consuming bandwidth, whereas viruses almost always corrupt or modify files on a targeted computer.
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.
In computing, a Trojan horse is any malware that misleads users of its true intent by disguising itself as a standard program. The term is derived from the ancient Greek story of the deceptive Trojan Horse that led to the fall of the city of Troy.
Sendmail is a general purpose internetwork email routing facility that supports many kinds of mail-transfer and delivery methods, including the Simple Mail Transfer Protocol (SMTP) used for email transport over the Internet.
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.
Robert H. Morris Sr. was an American cryptographer and computer scientist.
Robert Tappan Morris is an American computer scientist and entrepreneur. He is best known for creating the Morris worm in 1988, considered the first computer worm on the Internet.
Unix security refers to the means of securing a Unix or Unix-like operating system.
Blaster was a computer worm that spread on computers running operating systems Windows XP and Windows 2000 during August 2003.
The Berkeley r-commands are a suite of computer programs designed to enable users of one Unix system to log in or issue commands to another Unix computer via TCP/IP computer network. The r-commands were developed in 1982 by the Computer Systems Research Group at the University of California, Berkeley, based on an early implementation of TCP/IP.
The Cuckoo's Egg: Tracking a Spy Through the Maze of Computer Espionage is a 1989 book written by Clifford Stoll. It is his first-person account of the hunt for a computer hacker who broke into a computer at the Lawrence Berkeley National Laboratory (LBNL).
The Computer Oracle and Password System (COPS) was the first vulnerability scanner for Unix operating systems to achieve widespread use. It was created by Dan Farmer while he was a student at Purdue University. Gene Spafford helped Farmer start the project in 1989.
The Nimda virus is a malicious file-infecting computer worm.
The WANK Worm and the OILZ Worm were computer worms that attacked DEC VMS computers in 1989 over the DECnet. They were written in DIGITAL Command Language.
In computer security, the Zardoz list, more formally known as the Security-Digest list, was a famous semi-private full disclosure mailing list run by Neil Gorsuch from 1989 through 1991. It identified weaknesses in systems and gave directions on where to find them. Zardoz is most notable for its status as a perennial target for computer hackers, who sought archives of the list for information on undisclosed software vulnerabilities.
In computer science, a monoculture is a community of computers that all run identical software. All the computer systems in the community thus have the same vulnerabilities, and, like agricultural monocultures, are subject to catastrophic failure in the event of a successful attack.
A computer virus is a type of malware that, when executed, replicates itself by modifying other computer programs and inserting its own code into those programs. If this replication succeeds, the affected areas are then said to be "infected" with a computer virus, a metaphor derived from biological viruses.
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.
United States v. Morris was an appeal of the conviction of Robert Tappan Morris for creating and releasing the Morris worm, one of the first Internet-based worms. This case resulted in the first conviction under the Computer Fraud and Abuse Act. In the process, the dispute clarified much of the language used in the law, which had been heavily revised in a number of updates passed in the years after its initial drafting. Also clarified was the concept of "unauthorized access," which is central in the United States' computer security laws. The decision was the first by a U.S. court to refer to "the Internet", which it described simply as "a national computer network."
Dorkbot is a family of malware worms that spreads through instant messaging, USB drives, websites or social media channels like Facebook. Code Shikara is a computer worm, related to the Dorkbot family, that attacks through social engineering. Particularly prevalent in 2015, Dorkbot-infected systems were variously used to send spam, participate in DDoS attacks, or harvest users' credentials.
