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  , 21:56   #1
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По умолчанию Microsoft, Symantec Hijack ‘Bamital’ Botnet

Microsoft, Symantec Hijack ‘Bamital’ Botnet


Microsoft and Symantec said Wednesday that have teamed up to seize control over the “Bamital” botnet, a multi-million dollar crime machine that used malicious software to hijack search results. The two companies are now using that control to alert hundreds of thousands of users whose PCs remain infected with the malware.

bamitalThe tech firms said their research shows that in the last two years, more than eight million computers have been attacked by Bamital, and that the botnet’s search hijacking and click fraud schemes affected many major search engines and browsers, including those offered by Microsoft, Yahoo and Google.

Users of machines infected with Bamital are likely to see a Web page like the one pictured at right the next time they search for something online. That’s because Microsoft convinced a judge at the U.S. District Court for the Eastern District of Virginia to give it control over the infrastructure that Bamital used to coordinate the search hijacking activities of host PCs.

On Wednesday, technicians working on behalf of both Microsoft and Symantec raided data centers at Leaseweb USA in Manassas, Va., and ISPrime in Weekawken, New Jersey, accompanied by U.S. federal marshals. The two companies are now using the botnet’s control channels to communicate with infected PCs and to notify affected users.

According to Microsoft’s lawsuit, Bamital is most often installed via drive-by downloads, which use exploit kits stitched into hacked and malicious Web sites. Microsoft said the bad guys behind the botnet exclusively used the Phoenix Exploit Kit, a malware tool that uses vulnerabilities in Web browsers to silently install malware.

Bamital alters the organic search results on the host machine, redirecting victims away from sites as indexed by the major search providers toward pages that provide advertising and referral commissions to affiliate marketers. Redmond included several examples in its petition to the court, such as when a victim with Bamital searches for Microsoft Halo, and upon clicking the top link in the results is taken to a completely different set of search engine results.
Microsoft employees (left) at ISPrime, a hosting facility in New Jersey.

Microsoft employees (left) at ISPrime, a hosting facility in New Jersey.

Microsoft said Bamital also orders infected systems to participate in “click fraud,” or to generate automated Internet traffic by instructing those computers — without the owner’s knowledge or intervention — to connect to any Web site chosen by the botmasters. Meanwhile, the owner of the infected computer – even if they were sitting at the computer – would not see the hidden browser.

It’s not hard to see why threats like Bamital are so prevalent: An estimated $12.7 billion was spent on Internet advertising in 2012, and click fraud is taking a huge bite out of the expected returns. Microsoft’s own research indicates that 22 percent of all ad-clicks are fraudulent.

The takedown comes amid the release of even more alarming figures about bot-driven ad traffic. In its latest Bot Traffic Market Advisory issued today, New York-based ad network Solve Media said it tracked a “staggering” spike in bogus bot traffic affecting ad networks in the 4th quarter of 2012; the company estimates bots like those enslaved by Bamital cost marketers $1 billion in display ads and more than $2 billion in digital advertising investments.

Microsoft and Symantec told the court they believe that the fraudsters behind Bamital earned at least $1 million a year in profits from the operation. In its lawsuit, Microsoft listed the email addresses and other information supplied by 18 “John Does,” individuals thought to be affiliated with the scheme that Microsoft is hoping to identify.

Microsoft said all of the websites that it found were directing computers to the Bamital download sites installed a small “cookie” or text file on the user’s computer. “The text of this particular cookie is ‘yatutuzebil,’ which is an approximate phonetic spelling of a Russian phrase loosely translating to, ‘I was here already,’” Microsoft wrote. “It is likely that the cybercriminals use this cookie to identify computers that they have already probed.”

Microsoft and Symantec both warn that Bamital was often bundled with other malware. The two companies are guiding victimized users toward free tools to help clean up the malware, including Microsoft’s Safety Scanner and Symantec’s Norton Power Eraser.

A copy of the lawsuit Microsoft filed is here (PDF); a supporting declaration with more information about Bamital and its click fraud schemes is here (PDF).


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  , 02:45   #2
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Interesting thread!
Microsoft Security Essentials - very bad AV in all world!
 
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  , 13:30   #3
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halamalekum hahahaha
 
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Microsoft employees (left) at ISPrime, a hosting facility in New Jersey.






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