The millionaire profits put NetWalker as one of the most profitable pieces of ransomware during 2020.
Source: https://cointelegraph.com/news/mcafee-says-netwalker-ransomware-generated-25m-over-4-months
McAfee Says NetWalker Ransomware Generated $25M Over 4 Months
August 4, 2020
CoinTelegraph