CC files have been attacked by encryption virus.  How do I delete?

My creative cloud files have been encrypted and I have received a ransom note.  I want to delete these files before the virus gets into my computer.  So far the only files affected are the cloud files that have not been synced to my computer.  How can I get rid of them and how was someone able to access the cloud files and attach a virus?  I am very concerned about security at this point.  I use CC at work and cannot take the risk of cloud files carrying a virus to my companies servers, that would be too devestating.

Please help.

JLD