While the 8th is indeed at Kunsan and did play an aggressor role during an ORI at Misawa last year, the fact that it doesn't have a unit designation suggests it may be a privately generated patch that wasn't authorized by anyone at the 8th. It may even be a patch from a "Virtual Viper" unit ("Aerogroup Squadron"?; online gamers?). But I could be wrong.
Good hint. I've googled the name Aerogroup and found a civil company that trains fighter pilots. In their company video you see the patch, so problem solved. Thanks
[Link pending approval]