Winvnc hack!

From: Roberto (monserrock@hotmail.com)
Date: 10/29/02 

From: "Roberto" <monserrock@hotmail.com>
Date: Tue, 29 Oct 2002 13:15:26 -0800

Hello, can anyone tell me a way to see how my system was hacked. Rebooted
machine and noticed that winvnc was running. Checked the files and saw it
had been installed and all associations removed, except for the executable
which they tried to hide. Killed all connections and removed. Found a hack
article on how this happened, tested myself on another box and was amazingly
easy to do. How can I see where it came from and protect myself from this
type of attack. Thanks!