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A computer worm is a standalone malware computer program that replicates itself in order to spread to other computers. [1] 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.
Prevention of control system security incidents, [80] such as from viral infections like Stuxnet, is a topic that is being addressed in both the public and the private sector. The US Department of Homeland Security National Cyber Security Division (NCSD) operates the Control System Security Program (CSSP). [81]
Malicious code is a broad category that encompasses a number of threats to cyber-security. In essence it is any “hardware, software, or firmware that is intentionally included or inserted in a system for a harmful purpose.” [6] Commonly referred to as malware it includes computer viruses, worms, Trojan horses, keyloggers, BOTs, Rootkits, and any software security exploits.
The first well-known worm was the Morris worm of 1988, which infected SunOS and VAX BSD systems. Unlike a virus, this worm did not insert itself into other programs. Instead, it exploited security holes (vulnerabilities) in network server programs and started itself running as a separate process. [18] This same behavior is used by today's worms ...
Although created for academic purposes, the negligence of the author unintentionally caused the worm to act as a denial of service attack. It spread by exploiting known vulnerabilities in UNIX-based systems, cracked weak passwords, and periodically altered its process ID to avoid detection by system operators.
It disables security-related processes of anti-virus programs, while also blocking access to the Internet, which prevents updates. [68] Summer 2011: The Morto worm attempts to propagate itself to additional computers via the Microsoft Windows Remote Desktop Protocol (RDP). Morto spreads by forcing infected systems to scan for Windows servers ...
Cyberweapons are commonly defined as malware agents employed for military, paramilitary, or intelligence objectives as part of a cyberattack.This includes computer viruses, trojans, spyware, and worms that can introduce malicious code into existing software, causing a computer to perform actions or processes unintended by its operator.
Examples of e-mails with "Storm Worm" in the attachment. The Storm Worm (dubbed so by the Finnish company F-Secure) is a phishing backdoor [1] [2] Trojan horse that affects computers using Microsoft operating systems, [3] [4] [5] discovered on January 17, 2007. [3] The worm is also known as: Small.dam or Trojan-Downloader.Win32.Small.dam ; CME-711