25,000 Web Servers Infected by Linux Malware

As many as 25,000 web servers infected with Linux malware have been used in the past two years to hit website visitors with two variants of Windows malware. Security researchers in Europe are urging sysadmins — if they haven't already been notified by their ISP -- to check their web servers for the presence of several pieces of Linux malware, including a troublesome rootkit known as Ebury SSH for Linux and Unix.

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