.attribute Files Showing as Gibberish in Finder

Here’s the deal. I have a FreeNAS server, in which I am running Windows 7 in VirtualBox. I have a network share which is syncing to Dropbox nicely. If I view my share in Windows Explorer, I see all these attribute files. The same files on my Mac are showing up as gibberish in Finder. (.i.e. AD1MI3~P). Is there anything I can do to make Finder see these files the same as Windows, or better yet, to hide all the attribute files from both Finder and Explorer? Thanks.

How do those files show up on www.dropbox.com ?