Epicbot itself DOES NOT contain any malware... but the INSTALLER however does. I downloaded Epicbot and just ran the installer, didn't even complete it, and red flags popped up. The following is and excerpt from the villavu forums.
http://villavu.com/forum/showthread.php?t=77314
"IF you have downloaded this bot, and you are seeing decreases in PC performance, files disappearing, or anything else strange, open task manager, go to processes, Select: Show processes from all users, look for Au_.exe, and end it, then go to: C:\Users\User\AppData\Local\Temp, if you see a folder ~nsu.tmp open it, and see if there is a program with the Epicbot icon, if so, go back and delete the ~nsu.tmp and restart your computer. "
Just because your runescape account wasn't hacked doesn't mean that you didn't get any malware. This is spyware which is probably A LOT worse than having your account hacked... Do yourself a favor and check your computer out.