My files are in the cloud, so ransomware can't touch them

I hear this a lot, and it's one of the riskiest assumptions in cybersecurity.

Ransomware can affect OneDrive, Google Drive and AWS S3. Not because Microsoft, Google or Amazon get "hacked," but because of how we use them.

Here's how it usually plays out:

🔹 A laptop gets infected through a phishing email
🔹 Ransomware encrypts the files on it
🔹 The sync app sees the changes and uploads the encrypted versions
🔹 Every other device and shared folder gets the damaged files too

Syncing was built for convenience, not protection. It copies bad changes as quickly as good ones.

AWS S3 has a different weak spot: leaked access keys and loose permissions, which let attackers re-encrypt or delete data.

The good news is that there are ways to fight back:

✅ Turn on versioning and know where your restore tools are (OneDrive Files Restore, Google Drive version history, S3 Object Lock)
✅ Keep at least one backup that can't be changed or deleted
✅ Use MFA on every cloud account
✅ Apply least-privilege access
✅ Limit what syncs automatically
✅ Test your recovery before you need it

Sync is not backup. A backup you've never tested is a hope, not a plan.

How confident are you that you could restore your cloud data after an attack today? 👇

Ransomware #CyberSecurity #CloudSecurity #OneDrive #GoogleDrive #AWS #DataProtection #CyberResilience

.