The growing interest in cryptocurrency has led cybercriminals to apply their knowledge to mine Bitcoin and Ethereum. There were only 10% more attacks than in Q4 2020 YoY. However, there was a drop of 31% in attacks in the period against Q3 2020, according to Kaspersky. Due to the surge in cryptocurrency costs, some botnets might have been reprofiled by cybercriminals so that the C&C servers used in DDoS attacks could be used to mine cryptocurrencies.