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Washington (CNN) – It is nicknamed "creepware," and more than half-a-million people around the world have been prey to its silent computer snooping.
Miss Teen USA Cassidy Wolf was one of them in a well-publicized case of hacking associated with the malware called Blackshades.
Now, an international crackdown by the FBI and police in 19 countries has brought more than 90 arrests in what authorities say is a serious strike against a widespread and growing problem.
U.S. Attorney Preet Bharara in New York told reporters the global investigation "exposed and crippled a frightening form of cyber crime that has affected hundreds of thousands of users around the world."