What is the KLEZ virus?
Klez is a worm that spreads via the Internet by attaching itself to mass-mailed emails using SMTP to pass itself along. The worm virus itself is a Windows PE EXE file of about 65Kb in size and is written in Microsoft Visual C++. The subject line of the email carrying the virus payload is randomly selected from a list of possible choices.
The email message “From:” field will contain either one of the addresses found in a search of address books and files on the computer or an address taken from a list inside the virus body.
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