Ransomware has a long history, dating back to the late 1980s. Today, its generating billions of dollars in revenue for the criminal groups behind it. The average cost of a ransomware attack in 2020 was nearly $1.5 million for victim organizations that paid ransoms and about $732,000 for those that didnt. The number of ransomware threat actorsthose capable of developing and delivering codeis likely in the hundreds, not including so-called affiliates who buy ransomware-as-a-service offerings from some of these threat actors.”]
Source: https://www.csoonline.com/article/3607649/the-worst-and-most-notable-ransomware.html