NCC Group
Lazarus Group portrait: Sony Pictures 2014, Central Bank of Bangladesh 2016, WannaCry 2017 · (no date on page)
Lazarus gained notoriety for its attack on Sony Pictures in 2014 and an ingenious cyber heist on the Central Bank of Bangladesh in 2016 that stole $81 million. ... In May 2017, Lazarus spread the WannaCry ransomware, encrypting victims' files and demanding a ransom between $300 and $600 in bitcoin to unlock their data.