Does OneDrive Protect Files from Cryptolocker?
OneDrive offers some protection against ransomware like cryptolocker, but it has limitations. Here’s how it works and what to consider:
1. Ransomware Detection and Notification
If OneDrive detects suspicious activity, such as numerous files being modified in a short time (a typical sign of ransomware), it may send a notification. However, this detection isn’t foolproof and may not prevent an attack in real time.
2. File Version History
OneDrive keeps previous versions of files, allowing users to restore infected documents with uncorrupted versions. This feature is particularly useful for recovering data after an infection, but it only works within a set period (30 days for standard users).
3. Recycle Bin Backup
If ransomware deletes files, they aren’t immediately erased from OneDrive but go to the Recycle Bin, where they can be recovered within 30 days.
4. Full OneDrive Restore (available for certain plans)
OneDrive for Business or Office 365 users can restore their entire collection of files to a previous point in time within 30 days. This option is useful for returning all files to their pre-attack state, particularly in large-scale incidents.
5. Password Protection and Two-Factor Authentication
Although it doesn’t directly protect against ransomware, enabling 2FA reduces the risk of unauthorized access, which could facilitate an infection.
Limitations of OneDrive Protection
OneDrive isn’t an antivirus, so it can’t actively prevent ransomware from encrypting files on your computer. Infected files can still be synchronized to the cloud if ransomware affects local files. For more complete protection, consider:
- Using updated antivirus software that includes ransomware protection.
- Performing regular offline backups on devices not connected to the computer.
- Disabling automatic OneDrive syncing if an infection is suspected to prevent compromised files from uploading to the cloud.
Note: Utixo offers a full backup service for the entire Microsoft 365 environment, protecting all critical business data. This solution provides an additional layer of security and recovery for files, emails, and other data within 365.
