Hackers Breached LoopPay, Whose Tech Is Central to Samsung Pay By NICOLE PERLROTH and MIKE ISAAC OCT. 7, 2015 WASHINGTON — Months before its technology became the centerpiece of Samsung’s new mobile payment system, LoopPay, a small Massachusetts subsidiary of the South Korean electronics giant, was the target of a sophisticated attack by a group of government-affiliated Chinese hackers. As early as March, the hackers — alternatively known as the Codoso Group or Sunshock Group by those who track them — had breached the computer network of LoopPay, a start-up in Burlington, Mass., that was acquired by Samsung in February...