Bing Redirect Virus doesn't go away after running malwarebytes

ok so I downloaded Malwarebytes ran it once before... it cleaned my Mac and the bing redirect went away for a while and then it came back. I ran a scan again on malwarebytes and it says my Mac is clean and yet my Mac still redirects to a bing search. all my browser settings are correct, there are no extensions ... I am at a loss. I deleted my browser history restarted my Mac... everything I could think of and it won't go away. I have no weird programs in my application folder... HELP PLEASE!