I've used Little Snitch on my Mac for years and don't recall seeing this UBD process, until a few days ago while I had Apple Support on a call and they asked to remote view my Mac Desktop. During that session Little Snitch asked me to approve a UBD process connection to Windows.net and I joked about the irony of that with the agent (he didn't react).
Since that remote viewing session I have alerts from Little Snitch asking me to allow/deny UBD process "outgoing TCP connections to port 443 (https) of configuration.apple.com".
Since then I am also, oddly, getting Little Snitch alerts for a "gamed" process, "outgoing TCP connections to port 80 (http) of init.gc.apple.com"...and I haven't ever interacted with, even launched, the Game Center.
Btw, a top search-engine hit for the UBD process is http://Macinside.info/process.php?name=ubd
Just BE CAREFUL WITH THE LINKS there, like "Try a Free scan for fixing "ubd" related errors on your Mac..." to ZeoBIT.com. That is another name and domain used by Gregers Productions, the Belize company behind the infamous MacKeeper software, now also in the cloud storage business.