Qbot dat-a virus NEED HELP REMOVING VIRUS?

I have a couple hundred computers on the same network and one of them got the qbot dat-a virus and it has spread to all of the other computers. We have been unsuccessful at trying to remove it. We have Sophos Endpoint Security for our antivirus and it cannot remove it. Anyone who knows how to remove it in a simple way please tell me. We are in great need of getting rid of this virus.