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Omnimancer
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PostSubject: Computer Viruses   Tue Dec 16, 2008 3:59 am

A computer virus is a computer program that can copy itself and infect a computer without permission or knowledge of the user. The term "virus" is also commonly used, albeit erroneously, to refer to many different types of malware and adware programs. The original virus may modify the copies, or the copies may modify themselves, as occurs in a metamorphic virus. A virus can only spread from one computer to another when its host is taken to the uninfected computer, for instance by a user sending it over a network or the Internet, or by carrying it on a removable medium such as a floppy disk, CD, or USB drive. Meanwhile viruses can spread to other computers by infecting files on a network file system or a file system that is accessed by another computer. Viruses are sometimes confused with computer worms and Trojan horses. A worm can spread itself to other computers without needing to be transferred as part of a host, and a Trojan horse is a file that appears harmless. Worms and Trojans may cause harm to either a computer system's hosted data, functional performance, or networking throughput, when executed. In general, a worm does not actually harm either the system's hardware or software, while at least in theory, a Trojan's payload may be capable of almost any type of harm if executed. Some can't be seen when the program is not running, but as soon as the infected code is run, the Trojan horse kicks in. That is why it is so hard for people to find viruses and other malware themselves and why they have to use spyware programs and registry processors.


Last edited by Omnimancer on Tue Dec 16, 2008 4:44 am; edited 1 time in total
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PostSubject: Remote Explorer   Tue Dec 16, 2008 4:21 am

Remote Explorer virus
In December 1998 the Remote Explorer spread and started affecting Windows NT servers. It could spread on its own when clients logged on. This self-propagating nature of this new strain provided possibly the fastest means known at the time to create a widespread infection. An outbreak of this sort needed only a single, infected server and lots of connected client systems with shared drives. With these criteria met, it took almost no time before the entire use community was victimized. A use of an infected machine might suddenly realize that random files had been compressed and encrypted, rendering them useless. And if that weren't enough, it was even possible that the Windows NT Registry might be infected. Given the critical nature of the Registry on Microsoft operating systems, such results could be catastrophic.
The good news is t hat this virus did not spread very far because it didn't propagate across the internet but was confined to more isolated LAN environments. This meant the virus had to be planted on at least one server within the enterprise in order to kick off the replication process.
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