Jaromir Horejsi Jaromir Horejsi is a threat researcher at Trend Micro. He specializes in hunting and reverse-engineering threats that target Windows and Linux. He has researched many types of threats over the course of his career, covering threats such as APTs, DDoS botnets, banking trojans, click fraud and ransomware. In the past he has presented his research at RSAC, Virus Bulletin, FIRST, AVAR, Botconf and CARO. @JaromirHorejsi