Storage version [1390707963] is not supported for read-only access. Failed to open storage for read access

Question

Hi, I was using Veeam v12 on my server to backup my virtual machine on Windows Server. I got hacked with a Kraken v1.3 ransomware virus and all my files were encrypted. Most of the files on my backup drive also got encrypted, but the biggest and main backup of around 700GB seems to still have it's original extension. (the smaller files which i believe were incremental backups, are all encrypted) I setup a new server and installed Veeam v13. I tried to do a backup import of the main backup file, but then i receive an error:

2025/12/10 10:14:39 Failed : Failed to import backup Error: Storage version [1390707963] is not supported for read-only access. Failed to open storage for read access. Storage: [cPanel_Server.a0c28163-3b23-47d4-a1e9-1f056bfD2025-11-27T230013_CC92.vbk]. 2025/12/10 10:14:39 Failed : Background operation job failed Error: Storage version [1390707963] is not supported for read-only access. Failed to open storage for read access. Storage: [cPanel_Server.a0c28163-3b23-47d4-a1e9-1f056bfD2025-11-27T230013_CC92.vbk].

Is there any chance that this backup can still be recovered? Please.. Any help will be greatly appreciated.

ddomask · Answer

Pleaseopen a Support Caseand mention you are recovering from an Ransomware attack. Veeam’s Critical Incidents Team (SWAT) will review the situation and see what can be done.It’s possible that the backup did start to get encrypted but didn’t get to the extension rename (or the rename failed), but Critical Incidents Team has some limited means of checking if a backup file is encrypted -- typically ransomware only encrypts the first parts of large backup files (faster, typically destructive enough to prevent restores), and it can be checked if this is what happened.

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