Nov 22, 2015 · Linux.Encoder.1, the "Linux" crypto-ransomware, is not a Linux security hole. This malware relies on a security hole in the Magento web e-commerce platform, not Linux. If you use Magento and haven't patched it since February 9, 2015 -- yes it's been that long -- then, and only then, are you vulnerable.
Regularly backup user data: create copies of all user data at regular times to prevent data loss, should a ransomware attack occur. Enable Windows firewall: limit the spreading of ransomware within the corporate network by correctly configuring firewalls.