The worm is a modified version of a series of four cross-site scripting worms that spread last week via Twitter. Called "Mikeyy" or "StalkDaily," the worms started off as plugs for the Web site StalkDaily.com, which was owned by Mikeyy Mooney. Mooney admitted to creating the worm.

It was revealed on Friday that Mooney was hired by a Web company, Exqsoft Solutions, "who appear to have thought this a cheap way of publicity," Cluley said. Mooney may not be responsible for the new worm, but it could be from a script-kiddie looking for a job, or someone looking to take revenge on Mooney.

"It is perfectly possible this is a copycat attack or someone trying to get Mikeyy ... into trouble," Cluley said. Nevertheless, Mooney's original intent was dangerous and he has laid the groundwork for potential legal action against him, Cluley said.