Mysites123.com belongs to hijacker group of malware which is sometimes also called redirect viruses. This is malware that is responsible for taking control over browsers like Chrome, Firefox, Internet Explorer, or Microsoft Edge. It feigns to be a browser add-on and once it is installed willingly or not, it starts messing up with browser settings and conduct. Mysites123.com begins with changing the main page to mysites123.com, the search page that gave name to the hijacker. This page copies the design of Google search page in an attempt of making its presence unnoticed.