I've been getting a lot of weird emails lately. Emails that are a little too weird. So, naturally, I suspected them of being viruses... and I was right!
Security experts today warned of a newly discovered variant of the Sober worm that is spreading using a relatively sophisticated social engineering attack.The Sober N worm arrives as a ZIP file attachment in an email in either English or German. The email claims that the sender has been receiving your emails and has enclosed 10 in a file for your attention.
So be warned!

...
Not much you can say.
I found it here.