[BlueOnyx:18633] Linux-targeted 'encryption' blackmail

[Tigerwolf]

For a while now, I've been seeing reports of a malware attack on linux 
servers which encrypts a bunch of files and then demands a bitcoin payment 
to get a decryption key.  Most of the articles don't mention just *how* 
these attacks get in, but this one has a bit more information:

http://arstechnica.com/security/2015/11/new-encryption-ransomware-targets-linux-systems/

Has anyone had any infestations from this yet?