One of the biggest and most damaging malware attacks of the past 10 years, Wannacry infected millions of computers running Windows XP, 7 and 10 around the world, compromising hospitals, airports and government systems. Now the FBI has charged North Korean programmer Park Jin Hyok for a string of big cyber attacks, including Wannacry, the hacking of Sony Pictures in 2014 and stealing $81 million from a bank in Bangladesh.