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18 minutes ago by jamieyzdnetasia on twitterZDNet / News / Security
Pirated Windows 7 RC builds botnet
Summary
A Trojan horse embedded in a pirated version of the latest Windows OS has already created tens of thousands of bots, according to security researchers.
Topics
microsoft windows 7, technology, science and technology, computer technology, computer security, software, military technology, spyware and adware, intellectual property, copyright and fair use issues
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A pirated version of Windows 7 Release Candidate (RC) infected with a Trojan horse has created a botnet with tens of thousands of bots under its control, according to researchers at security firm Damballa.
The software, which first appeared on 24 April, spread as quickly as several hundred new bots per hour, and controlled roughly 27,000 bots by the time Damballa took over the network's command and control server on 10 May, the firm said on Tuesday.
The pirated software was spread via popular piracy sites and online forums, Damballa said.
The software is primarily designed to download and install other malicious packages under a 'pay-per-install' scheme, under which the botmasters are paid based on the number of other pieces of malware they cause to be installed, Damballa said.
Infected installations are continuing to appear at a rapid rate, according to the company.
"We continue to see new installs happening at a rate of about 1,600 per day with broad geographic distribution," said Tripp Cox, Damballa's vice president of engineering, in a statement. "Since our takedown (of the command and control server), any new installs of this pirated distribution of Windows 7 RC are inaccessible by the botmaster."
However, the botmaster still controls the existing installations, Damballa said. The infected systems are mainly concentrated in the United States, with 10 percent, and the Netherlands and Italy, with 7 percent each.
Windows 7 RC has been used as a lure by other malware distributors since its launch on 5 May, according to security experts. On Monday, Trend Micro said it found the Trojan horse TROJ_DROPPER.SPX masquerading as a copy of the release candidate.
Botnets are one of the most serious threats on the internet, according to security experts, and are typically used to carry out denial-of-service attacks or phishing schemes or to send junk mail. Last month, SecureWorks researcher Joe Stewart suggested that technology was not enough to stop botnets, arguing the IT industry should look to new law-enforcement measures.
The legitimate version of Windows 7 RC is available from Microsoft's Web site.
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