In addition, Microsoft has issued a patch covering the IFrame vulnerability exploited by Winevar, as well as an ActiveX vulnerability used by Winevar. Users who suspect they are infected are advised not to restart their machine before removing the worm's files. Most leading antivirus companies have posted updated definitions for the new worm and instructions on removing the worm from infected machines. Microsoft believes that you should have control over your Windows experience. Sophisticated worms take advantage of software vulnerabilities to propagate. Worms can spread through email, instant messaging, file sharing platforms, social networks, network shares, and removable drives. Winevar is known to have infected machines, according to Kaspersky Labs. Worm: A type of malware that spreads to other devices. Once infected machines are rebooted, the worm displays a dialogue titled "Make a fool of oneself" with the message "What a foolish thing you have done!" Clicking on an OK button on the dialogue deletes all files on the computer's hard drive that are not currently opened, according to the security advisories. Whereas Bridex simply gathered information on the systems it infects, however, Winevar can cause real damage to machines. The worm then uses Simple Mail Transport Protocol to e-mail copies of itself to those addresses, using random series of numbers to disguise the name of the attachment containing the worm, further complicating the task of identifying infected e-mail messages. Winevar spreads itself by searching out e-mail files and extracting addresses from them.
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