Search.buildupstage.com is a fake search service that pretends to be a legal search engine. Created by Buildupstage this service is a part of network specializing in Mac software distribution. It was designed to earn profit generating traffic to Yahoo. It is nothing more than a typical browser hijacker that hacks browser and system configurations without users' permission. After that, Buildupstage virus is able to collect user personal data, his browsing activity, subsequently transferring this data to third parties for commercial purposes.