Worm Sample Clauses

Worm. A worm is similar to a virus. They replicate themselves like viruses, but do not alter files like viruses do. The main difference is that worms reside in memory and usually remain unnoticed until the rate of replication reduces system resources to the point that it becomes noticeable, e.g. when they generate high network traffic. Trojan horses A Trojan horse is called such as a reference to the story of the Trojan horse from Greek legend. It is a malicious program disguised as a normal application. Trojan horse programs do not replicate themselves like a virus, but they can be propagated as attachments to a virus. Such a malicious code can be used for an unauthorized person to get remote control of the platform on which it has been furtively installed. Macro Viruses A macro virus is a computer virus that “infects” a Microsoft Word or similar application and causes a sequence of actions to be performed automatically when the application is started or something else triggers it. Macro viruses tend to be surprising but relatively harmless. A typical effect is the undesired insertion of some comic text at certain points when writing a line. A macro virus is often spread as an e-mail virus. A well-known example in March, 1999 was the Xxxxxxx virus.