Twitter is finally clear of a worm that hijacked user accounts and spread spamlike messages reading "Mikeyy" throughout the microblogging site's network.

Dubbed "StalkDaily," the Twitter worm unleashed four waves of attacks against the service, in each case exploiting a cross-site scripting vulnerability. The only goal of the malware seemed to be self-propagation; it had been created by 17-year-old Michael "Mikeyy" Mooney, who confessed that he had created the worm out of boredom.

Starting at 2 a.m. on April 11, four Twitter accounts began spreading the worm. Security teams promptly began "eliminating the vectors that could identify this worm," all while securing an increasing number of propagating accounts. 

By the end of the weekend, the security team had identified and deleted nearly 10,000 "tweets" seeking to still spread the worm.

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