Jan Sirmer Jan Sirmer is a malware analysis team lead at Avast. His main specialization is analysing malicious Java threats, Android applications and exploits, macro viruses, web-based malware and other non-executable malware. During the course of his career, Jan has authored blog posts about phishing threats, malicious web exploits and Android threats. In the past, he has presented his research at AVAR, Botconf, FIRST, RSA, Virus Bulletin and WebExpo.