Data-stealing 'Mumba' botnet hits 55,000 systems

A criminal gang has stolen over 60GB of data using a botnet that has infected around 55,000 computers around the world, according to a report from security company AVG.

The botnet, which AVG has dubbed "Mumba," has compromised systems in the U.K., as well as in the U.S., Germany, and Spain, the company said in a report (PDF) released Monday. The stolen credentials found by AVG's researchers includes bank account numbers, credit card details, and social-networking log-ins.

"The Mumba botnet--so called because of some funky attributes our researchers found on the server--was created by one of the most sophisticated group of cybercriminals on the Internet known as the Avalanche Group," AVG said in a blog post.

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