Malware or phishing links that request permission to access your OneDrive are also a way for an attacker to gain access to your files. Attackers can gain access to your Microsoft 365 environment after a successful phishing attack, encrypting all your OneDrive files. Otherways to infect filesĮven if you don’t sync the files, there are still ways for ransomware to encrypt them in OneDrive or SharePoint. When a device gets infected with ransomware, any files that are encrypted are simply synced backed to OneDrive or SharePoint. Locally stored files are easier to work with, but they are also exposed to ransomware attacks. And even with SharePoint, we see that a lot of users synchronize the document libraries with their devices. The problem, however, is that pretty much all the OneDrives are synced to a local device. Most people assume that files stored online can’t be infected. So the question is, how can we protect our data in Office 365 against ransomware? And what options do we have when it comes to recovery? How can Ransomware infect files in OneDrive or SharePoint?īefore we take a look at what you can do to protect yourself against ransomware, let’s first take a closer look at how files in OneDrive or SharePoint can get infected. We can of course use PowerShell in these cases to speed up the restore process, but it will still be a lot of work and prone to errors. You will have to select all the files and subfolders as well. You can’t simply select the folder and hit restore. Have you ever tried to restore a complete document library from the first-stage recycle bin? These tools are great for the occasional restore action, but when it comes to restoring a lot of files, you will soon run into limitations. When we talk about protecting data in Office 365, a lot of people rely solely on file versioning and the first- and second-stage recycle bin. One of the problems is that some malware is capable of removing the version history (by copying the files and deleting the originals)-restoring files can thus be quite challenging.
So, storing your files online in OneDrive or SharePoint might feel safe with versioning and the recycle bins, but without a proper backup solution, you’re still vulnerable to data loss.
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