Google? Pubmed? phhhhhtttt! I have a secret source for tough searches on MS. Drum-roll please..........the "search" function in the ThisIsMS forums! This site has been around for a few years now with lots of people posting lots of stuff.
I wouldnt poo-poo google too quickly. There is the google search (down the left of your thisisMS page, thanks to Aaron for pointing it out to me), but you can also search specifically within ThisIsMS by typing the following into google directly also
which gives 5 hits. example1
You could even check if you had typed anything on the same page: eg
site:www.thisisms.com +cryptovirus +lyon example 2
which pulls up a thread. Its pretty powerful. The "+" forces google that it MUST have this word in the page (I dont do any search engines without it). For a phrase, place it in quote characters so "nice portrayal of the raspberry sound" would pull up this page.
So, using google in the above ways, while not limiting it to This Is MS provides 287 hits HERE
that are specific to MS and cryptovirus.