Be on the lookout for suspicious tweets like these and don't follow links indiscriminately.
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Reinfected machines likely part of the 5.5 to 6 million-strong Conficker headcount.
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Symantec researchers have uncovered a Trojan using a private newsgroup within Google Groups as a command and control server. The move follows an attempt to use Twitter as a C&C earlier this year.
There is nothing technically interesting about these attacks. They are mundane, pedestrian Trojan droppers. The one F-Secure writes up is a file named Michael-www.google.com.exe. This file has been distributed through photos-google.com and possibly also through photo-msn.org, facebook-photo.net and orkut-images.com. Don't visit these sites.
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Computer users often dismiss Internet security best practices because they find them inconvenient, or because they think the rules don't apply to them. Many cling to the misguided belief that because they don't bank or shop online, that bad guys won't target them.
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Security experts say consumers must keep updates for anything to do with their browser current, though most now do not do this. This includes updates for Internet Explorer, Firefox, Safari, Opera, Chrome, Adobe Flash, Adobe Reader, iTunes, QuickTime, Windows Media Player and RealPlayer. Such updates increasingly include important security patches that can block infections from taking hold.
A large variety of computer viruses/virii roam the Internet to infect computers with an array of maladies from annoying to devastating. Most of these can be prevented.