VirusTotal has published a report detailing its findings from analyzing 80 million ransomware samples. VirusTotal says that of those samples, 95 percent targeted Windows machines. The report breaks down ransomware activity by threat operator groups and geographic areas targeted. The data were collected between January 2020 and August 2021.
More: https://www.theregister.com/2021/10/14/googles_virustotal_malware/