Netskope: Cloud-delivered malware has reached an all-time high of 68% with cloud storage apps accounting for nearly 67% of that cloud malware delivery. Google Drive and Microsoft OneDrive personal instances are the most popular targets. 97% of cloud apps used in the enterprise are shadow IT, unmanaged and often freely adopted. Some departing employees upload three times more data than usual to personal cloud apps in the last 30 days of employment. 97% Google Workspace users have authorized at least one third-party app access to their corporate Google account.
Source: https://www.helpnetsecurity.com/2021/07/28/cloud-threats-affecting-enterprises/