AdBlock Stream is adware. These adware applications display advertisements not originating from the sites you are browsing. Malwarebytes can detect and remove this adware program. The full version of Malwarebyte would have protected you against this hijacker. It would have blocked their website, giving you a chance to stop it before it became too late. The full edition of the full version will have blocked them from using the hijacker’s website. It is possible to remove the program completely.”]
Source: https://forums.malwarebytes.com/topic/267711-removal-instructions-for-adblock-stream/