What are immutable backups and why are they critical for infrastructure security?

Immutable backups represent a special type of data storage where created archives are physically or programmatically protected from any modifications and deletion for a specified period of time. Even with system administrator rights, a user or malware will not be able to erase or encrypt such files until the expiration of the established retention period.

The main task of such technology is protection against modern cyberattacks, including ransomware. Attackers often try to first find and destroy the organization's backups to deprive it of the ability to recover and force it to pay a ransom. Using immutable storage completely blocks such scenarios, as the storage system rejects any requests to modify the data.

To implement the immutable approach, special cloud storage settings, such as object lock mode, or dedicated hardware solutions based on WORM technology are usually used. When configuring, it is important to correctly determine the retention period, which should comply with the company's internal security regulations and take into account the time required to detect hidden threats in the infrastructure.