Ransomware attacks have become one the top security threats facing individuals and corporations alike. Although most of these attacks are still aimed at PCs, another popular target has emerged: Android-based mobile devices. According to ransomware experts here at Avast, Android ransomware saw an increase in Q3’17 YoY of 72% and an even higher increase in Q4’17 YoY of 116%, as several high-profile attacks made the rounds.