You’re infected—if you want to see your data again, pay us $300 in Bitcoins
You can work to prevent this by creating a group policy that disallows<p><pre><code>     %AppData%\*.exe 
</code></pre>
and<p><pre><code>     %AppData%\*\*.exe
</code></pre>
A good discussion of this happened here: <a href="http://www.reddit.com/r/sysadmin/comments/1mizfx/proper_care_feeding_of_your_cryptolocker/" rel="nofollow">http://www.reddit.com/r/sysadmin/comments/1mizfx/proper_care...</a><p>sidenote: this virus actually scares me, and it sounds like it actually scares most people who work in IT.  This is the shittiest thing anybody has ever seen, it sounds like.