The net menace was the one-time world's biggest bot worming its way since 2008 through millions of machines across every country in the world, smashing through social networks including Facebook, Skype, and popular email services.

It exploits a Windows vulnerability CVE-2008-4250 shuttered in a Microsoft critical update that year.

Check Point says it registered the worm as the chief threat last month noting it was behind 17 percent of malware attacks.

Their creation has remained in headlines since 2008 having infected a swath of cheap hard drives and USBs, and even police body-worn cameras in the United States.

Check Point noted Conficker's dominance last December, and CERT UK recently said it found more than half a million infections in April .

Its rootkit was thought to reside on more than a million machines and is still operating thanks to an incomplete command and control take down effort in 2013.

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