GameGuard have detected SDNK hack on December 29th 14:10 EST
It will disconnect your game right about 2 minutes after you start the game.
Then a box will pop out and say:
C:\ijji\ENGLISH\AVA\Binaries
Which it is means it have detected the hack.
If you start the game before it patch the GG, then you're fine.
Edit: Confirmed, some PC have to restart in order to get away from the C:\ijji\ENGLISH\AVA\Binaries pop up.