The mystery figure behind what prosecutors call the biggest financial hack of all time is now in U.S. custody.
Andrei Tyurin, a Russian citizen who is alleged to have performed key cyber-work in a hack of JPMorgan Chase & Co. and about a dozen other companies, was extradited to New York on Friday from the republic of Georgia. It was the unlikely culmination of a years-long hunt by U.S. authorities, who had closely tracked a hacker they said led cyber breaches of financial firms that fed an array of activities including securities fraud, money laundering, credit-card fraud and fake pharmaceuticals.
Federal authorities in New York laid out most of those details three years ago when describing a breach of a swath of the financial system that created more than 80 million victims. Other targeted companies include Fidelity Investments, Dow Jones & Co., E*Trade Financial Corp. and Scottrade Financial Services Inc.
