Minseok (Jacky) ChaAhnlab South Korea FlagAhnlab South Korea MapAhnLab, South KoreaCopyright © 2018 Virus BulletinAbstract Overview Sony Pictures hack Characteristics of malware Operation Mystery Dot (2011–2014) Dropper (2011) Redobot (KorDllbot) Early version of Escad (2014) Operation Red Dot (2014–2015) Changes in malware Operation Big Pond (2015–2017) Operation Coin Rush (2017–2018) Suspiciou..