How to protect your backups from ransomware (Cryptolocker, WannaCry, and the like…)

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Ransomware is a type of malware that restricts access to the infected computer system, and demands that the user pay a ransom to the malware operators to remove the restriction. Probably the most famous ransomware is Cryptolocker, and it’s definitely something you don’t want to deal with.

Regardless of the strenuous efforts put in place by Antivirus developers, the rate of infection is appalling. And what is worse is that such ransomware can also access all the shared folders on your NAS/SAN, so if you backup to a network drive your backups will be compromised too. The ransomware objectives include, in fact, preventing you from being able to restore your old (healthy) data from a backup.

Managing such situation with permissions and ACL (access-control lists) is a nightmare, and it’s hard to reach a true WORM (write once read many) situation which is the only truly secure way to prevent the ransomware from modifying the backups you’ve already stored. And if you have healthy backups the ransomware is “de facto” already defeated.

So what can you do to store your backups somewhere else in a truly WORM way? Continue reading