Ransomware has been around for more than three decades, so it's hardly an unexpected threat. And yet, organisations large and small are still being taken completely by surprise by the file-encrypting malware, leaving them to decide between rebuilding many of their computer systems from scratch to rid themselves of the ransomware or paying up to the crooks in the hope that they will hand over the encryption keys. So why aren't we learning the lessons from all the companies that have already been hit by ransomware over the years? Here are a few reasons.
https://www.zdnet.com/article/ransomware-why-the-internets-biggest-headache-refuses-to-go-away/