Klez

The Klez virus is a computer virus from the year 2001. It spread through to e-mail attached files and infected Windows operating systems to read out personal information, especially e- mail addresses, and also to spread even further. A so -propagating type of virus is also called computer worm. He also worked as spam spreader by spreading unwanted files in large quantities by the recipient. A few months after his first appearance in October 2001, the Klez virus played virtually no role because it discovered the anti- virus software and Microsoft closed the relevant for the intruder security vulnerabilities.

Operation

The Klez virus penetrated through the e -mail program Outlook or the web browser Internet Explorer (under the operating systems Windows 95, 98, NT 4.0, ME, 2000 and XP ) via the Internet to the PC. He disguised of his origin and read unnoticed data from the e- mail or chat programs from. The addresses obtained in this way he used to ( unnoticed by the user) to send new emails to his friends and acquaintances, with the virus as an attachment. In order to remain undetected for as long as possible, the Klez virus also altered the detection mechanisms of the then popular antivirus software.

Removing the virus

Because of the infection of the anti-virus program had to be separated to remove the Klez virus, the computer from the Internet and an uninfected medium (such as the original Windows CD ) started and disinfected.