No doubt the mail server filters will be updated to deal with this new malware, but then some twerp will write something new.
Meantime, that Snopes page offers links so Windows users can download updated Symantec virus definitions and remove any infections. If you use Windows, please assume you're infected (I'm not blaming you, it's just how the odds work) until you have updated your anti-virus software to recognize and handle Sober.X and run a fresh scan. Please do it now. Thanks.