McAfee released its new report, examining cybercriminal activity related to malware and the evolution of cyber threats in the third and fourth quarters of 2020. In Q4, there was an average of 648 threats per minute (10%) over Q3. Ransomware grew in volume 69% from Q3 to Q4 driven by Cryptodefense. REvil, Thanos, Ryuk, RansomeXX and Maze groups topped the overall list of ransomware families. The Eternal Blue exploit was the most prominent in Q4 2020.
Source: https://www.helpnetsecurity.com/2021/04/19/covid-19-themed-cyberattack/