Nowadays, the issue of system data backups is a hot topic due to the threat of cyber attacks. The aim of the presented project in this article is to research, design and develop a semi intelligent malware defense system to protect the backed-up data against the threat of cyber-attacks such as ransomware and malware. The focus is on automation, artificial intelligence and support for most backup and archiving software, so-called full agnostic solutions combined with a malware defense system. The resulting solution enables both active prediction of data infections and detection of infected data on already backed-up systems.