This is how i found out.

For windows, download http://www.zemana.com and open the wallet. I let it run a but then I got a notification.. Just saying, all other wallets don't pop up a notification but this one. I could be wrong, but i'd rather throw a warning then let's innocent people be a victim.

Also VMbox has the ability to disable host to VM clipboard sharing. https://forums.virtualbox.org/viewtopic.php?f=6&t=32446