The Mac Keeper malware (assuming it's not the junkware from Zeobit which is different) is one of the MacDefender offshoots. You should able to remove it by following these instructions:
(1) There is no standard in naming malware; each vendor has its own system. So you need to refer to Kaspersky to find out what "hoax.osx mackeeper.a" is.
(2) This forum is for Mac OS X v10.6 Snow Leopard. Your profile says you're using Lion. If your profile is correct, you're in the wrong forum.
(3) Friendly advice: Try punctuation once in a while. If your post is easy to read, you're more likely to get useful answers.