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Melissa went beyond the normal reproduction mechanisms of macro viruses. Instead of just infecting Word documents as they were opened on an infected PC, it used a program written in VBA Jason Kidd Jersey , the macro programming language, to send itself in an attachment file to the first 50 entries in a user’s address book. This emailing was done in the background, unbeknownst to the user. A recipient who opened the attachment would become infected and could immediately send Melissa out to 50 more people. This chain reaction enabled Melissa to spread around the world in four days. Although there was no destructive payload, the sheer number of messages clogged up many company email systems. In many people’s eyes the worm had turned!




Before Bubble Boy Shaquille O'Neal Jersey , users were comforted to know that it was not possible to catch a virus just by reading email. Bubble Boy was written to demonstrate that this was not necessarily true. The author sent it to anti-virus researchers who were warned of the possible consequences, but it then started to spread. It used vulnerability in ActiveX to allow it to run automatically if the email that contained it was read. The Preview pane in Outlook Express is, in effect, reading the email Steve Nash Jersey , so users with the Preview pane enabled were infected with no action on their part. Microsoft® released a patch for the ActiveX hole, but many people feel that the Preview pane is a benefit that is not worth the risk.




This is a macro virus that attempts to steal a PGP user’s private key by looking for PGP in the file system and searching for the default name of the key ring. This malware acted as a warning for encryption users everywhere. Even if you could use perfect encryption, so strong that no one could break it, it is insecure if someone has a copy of your private key. This virus showed how attackers might try to grab users’ private keys.




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This is a remote access Trojan, one of the most popular for two reasons. Firstly the source code has been distributed freely along with a software development kit, allowing programmers of a hacking disposition to modify and improve it. Secondly Dan Majerle Jersey , it is highly flexible and comes with a graphical user interface for the ‘user’ to set parameters, such as how it communicates between the server (running on the unsuspecting host) and the client.




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