Darned good question considering what has to be done to get it. Unless the person who got it had their hands tied behind their back, we all know that the system could be very secure but not from a stupid user!
Slenfbot primarily spreads by luring users to follow links to websites, which contain a malicious payload. Slenfbot propagates via instant messaging applications, removable drives and/or the local network via network shares.--
Age is a very high price to pay for my maturity. If I can't stay young, I can at least stay immature!