GFive A98 infected by Ghost Push Trajon Virus HELP!!!

Hello Dear Experts,
I have G'Five Smart A98 smart phone, it was infect with some kind of virus, which automatically start downloading different Apps and Pron video and it open WiFi automatically start downloading. Phone not connecting with PC via USB mass storage because when it connect with PC for few seconds, i click to Virus Scan, it closed USB connection.
I tired to Hard Reset/Factory Reset and also Wipe Cache but Nothing stops / remove virus.
I install CM Security and Avast Anti Virus but can not clean virus.

PLEASE HELP WHAT I DO??????

Thanks

from xda-developers http://ift.tt/2d7QwkP
via IFTTT