Your Backup Isn't Ransomware-Proof Just Because It Exists
Oct 26, 2026
Ask most IT teams whether they are protected against ransomware, and the answer usually starts with "we have backups." That is true as far as it goes. Backups protect against hardware failure, accidental deletion, and most non-adversarial data loss. Ransomware is a different problem, because the attacker is actively hunting for those backups. A backup is resilient against ransomware only when attackers cannot alter or delete every recoverable copy, and when the selected recovery point has been checked before restoration. CISA's #StopRansomware Guide , developed jointly with the FBI, NSA, and the Multi-State Information Sharing and Analysis Center, states that many ransomware variants attempt to find and delete or encrypt accessible backups specifically to make restoration impossible unless the ransom is paid. Backup storage that is reachable from a compromised environment, particularly through compromised administrative credentials, can become part of the attack surfa...