Proofpoint warns OneDrive file version limits could aid ransomware attacks

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Ransomware attackers can exploit OneDrive feature to delete backups

Proofpoint security researchers have discovered a way to exploit Microsoft cloud storage file version limits that could allow ransomware to encrypt OneDrive and SharePoint files and render them unrecoverable.

Ransomware attacks involve attackers locking users out of their own files by encrypting them.
 
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