We are reviewing our Incident Response plan specifically for Ransomware. Beyond just having backups, what are the modern strategies for ensuring data resilience? How do we protect our backups from being encrypted or deleted by the attackers themselves during an active breach?
3 answers
Modern ransomware resilience relies on "Immutable Backups." These are backups that cannot be changed, encrypted, or deleted for a set period, even with administrative privileges. This stops attackers from wiping your safety net. You should also adopt the 3-2-1-1-0 rule: 3 copies of data, on 2 different media, 1 offsite, 1 offline (air-gapped or immutable), and 0 errors after backup verification. Furthermore, practice "Clean Room Recovery." This involves restoring data into a clean, isolated environment where you can scan for dormant malware before bringing systems back into production.
Immutable backups sound great, but what is the typical recovery time objective (RTO) for a full-scale restoration? Is it realistic for a business to stay down for days?
Don't forget about "Logical Air-gapping." Using cloud-based, identity-isolated storage can be just as effective as physical tapes if managed with strict, separate credentials.
Exactly. Physical air-gaps are hard to manage, but a separate AWS S3 bucket with Object Lock and its own set of MFA-protected IAM users is a powerful modern alternative.
It depends on your architecture. If you use "Instant Recovery" features found in modern backup software, you can run VMs directly from the backup storage while the data restores in the background. This can reduce RTO from days to minutes. However, the bottleneck is often the "forensics" phase—making sure you aren't just restoring the same vulnerability that let the hackers in the first place.