Smart Protection Network (SPN) data and observations from Managed Detection and Response (MDR) for the North American region show the persistence of older threats and tactics: delivery methods such as spam emails are still going strong, while ransomware attacks have seen a renewed vigor alongside newer threats such as cryptocurrency mining malware in the third quarter of 2018.

https://blog.trendmicro.com/trendlabs-security-intelligence/gathering-insights-on-the-reemergence-and-evolution-of-old-threats-through-managed-detection-and-response/