1. Backups Stored on the Same Network

Modern ransomware actively searches for backups and deletes them. If backups are on the same network, same server, or directly connected storage — they are usually encrypted first.

Fix: Use offsite backups or a cloud backup provider with isolation.

2. Backups Without Version History

Many companies only keep a single backup copy. But ransomware can sit quietly in a system for weeks before activation. By the time it triggers, the most recent backup is already infected.

Fix: Keep multiple versions (daily/weekly) so you can roll back safely.

3. Backups That Were Never Tested

The biggest failure: businesses assume backups work because “the system said success.” But during an incident, they discover:

• The backup file is corrupted
• They can’t restore fast enough
• The backup didn’t include critical folders

Fix: Test restoring at least once every quarter.

4. Credentials That Ransomware Can Access

If backup software uses saved credentials or weak admin passwords, ransomware can log in and delete all stored backups.

Fix: Use MFA and separate backup admin accounts.

5. Ransomware Targeting Cloud Storage

Cloud backups are safer — but only if configured properly. Attackers often use stolen credentials to delete cloud snapshots or overwrite clean backups.

Fix: Enable immutability (write-once storage) so backups cannot be changed or deleted.

6. Slow Recovery Times That Hurt the Business

Even if backups are clean, recovery may take days — costing far more than the ransomware itself.

Fix: Identify your critical systems and ensure fast-restore options are available.

The Goal: Backups That Survive Real Attacks

A ransomware-resilient backup strategy has three key elements:

• 1. Isolation — ransomware cannot reach or delete your backups
• 2. Versions — multiple restore points exist
• 3. Testing — you know restoration works before you need it