Security researchers from ESET, CERT-Bund and other agencies have been monitoring a cybercriminal operation in which over 25,000 UNIX servers have been infected and abused over the past two years. The campaign has been dubbed Windigo (the name of a mythical creature from Algonquian Native American folklore). Infected servers are being used to send out 35 million spam emails each day, putting around 500,000 computers at risk of getting infected with malware.
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