A prolific foreign hacker behind cyberattacks that netted an estimated $55 million is facing sentencing by a U.S. judge in a conviction considered an unusual win for law enforcement officials who have identified hundreds of others like him but failed to put them in handcuffs. Ercan Findikoglu, a Turkish national, had gone to great lengths to avoid capture by the U.S. Secret Service, both by obscuring his cyber fingerprints but also by avoiding the reach of American law, according to court papers.