WhatIs definition: Zero-day vulnerability

Malware, Viruses, Trojans and Spyware

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  • barnacle

    In a computer, a barnacle is unwanted programming, such as adware or spyware, that is downloaded and installed along with a user-requested program. 

  • malvertisement (malicious advertisement or malvertising)

    A malvertisement (malicious advertisement) is an advertisement on the Internet that delivers a malicious payload.  

  • Quiz: Malware

    So many kinds of malware in the wild! From garden variety worms to hybrid viruses, you've got to watch out for Trojan horses, spyware, and social engineering -- and don't forget to secure that back door! The first line of defense is knowledge, unders... 

  • advanced persistent threat (APT)

    An advanced persistent threat is a network attack in which an unauthorized person gains access to a network and stays there undetected for a long period of time. 

  • domain rotation

    Domain rotation is a technique use by malware distributors to drive traffic from multiple domains to a single IP address that is controlled by the distributor. The goal of domain rotation is to make it harder for a network administrator to blacklist ... 

  • metamorphic and polymorphic malware

    Metamorphic and polymorphic malware are two categories of malicious programs that have the ability to change their code as they propagate. 

  • bot worm

    A bot worm is a self-replicating malware program that resides in current memory, turns infected computers into zombies (or bots) and transmits itself to other computers. A bot worm may be created with the ultimate intention of creating a botnet that ... 

  • cyberterrorism

    According to the U.S. Federal Bureau of Investigation, cyberterrorism is any "premeditated, politically motivated attack against information, computer systems, computer programs, and data which results in violence against non-combatant targets by sub... 

  • I-SPY Act -- Internet Spyware Prevention Act of 2005 (H.R. 744)

    The I-SPY Act, formally known as the Internet Spyware Prevention Act of 2005 (H.R. 744), is a bill in the U.S. Congress that would criminalize the unauthorized use of spyware, phishing, and other methods of using the Internet to obtain sensitive pers... 

  • government Trojan

    A government Trojan is spyware installed on a computer or network by a law enforcement agency for the purpose of capturing information relevant to a criminal investigation. Government Trojans represent a step in turning the tables on cybercriminals b...