The group of hackers that crippled the computer infrastructure of Sony Pictures Entertainment in late 2014 has been responsible for a large number of attacks against organizations from South Korea, the U.S. and other countries over the past seven years. The attacks included cyberespionage,. media, military,. aerospace, and critical infrastructure sectors stretching as far back as 2009. The group has been dubbed Lazarus by a coalition of security vendors who have worked together over. the past two years to investigate its activities. The incident cost Sony an estimated $35 million in IT repairs.”]