A multilingual worm, Zafi-B, is rapidly spreading using peer-to-peer file sharing networks and e-mail according to anti-virus supplier Sophos.
The worm first appeared on 11 June, and uses a variety of languages, including Hungarian, English, Italians and Spanish.
The worm can display a message box in Hungarian calling for the death penalty and accommodation for the homeless.
"The Zafi-B worm has accounted for over 60% of the reports to Sophos' global network of monitoring stations over the past 24 hours, making it the most widespread email worm at the moment," said Graham Cluley, senior technology consultant for Sophos.
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