Now I already know that making sure your browser plugins are either non-existent or up-to-date is one way of being on the safe side against ransomeware like Cryptowall 2.0; but since clicking ads are the way this thing is distributed, would ad-block plus be an effective plugin against such threats?
Zedo and Double Click have been effected by this thing in the past, and this time around I believe it might have been on yahoo.com or msn.com (not completely sure though).