Server Query hack

A few days ago I received a poke from "Admin" with the message "NEW IP, CLICK HERE!" Everyone else connected to the server at that time also received the message and they alerted me about it, when I tried banning the user it said "missing required parameter" but when I checked the banlist the ban was registered as "uid=ServerQuery (Unknown from 37.187.252.194:48319)" ... I tried connecting to the ip that was sent through the poke as a message and it connected me to a European server, today the same thing happened, I stepped out for a bit, when I came back I received 3 pokes from the same ip "uid=ServerQuery (Unknown from 37.187.252.194:48319)" but when I tried connecting through the poke message It connected me to a different server not the one like before, I'm not connected to any Query programs and I have no Idea what is going on it is really affecting me and my clients and i wish to do something about it asap. :<

Server Query hack