There is no reversing it and you have to have the node associated with a wallet. Now that the MM wallet has been hacked, what should I do?

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You should do nothing and im sorry for your lose, the most important thing is if you wanna try to run or use 3rd service in your computer and you must try to make sure that you didn't use it in the same device that being used to store your wallet that contains all of your coins. Your coins can be returned and it seems like that the program that you have used it to sign up thru strongblock was a fake program.
There may some possibilities but i do believe that if this is making the hacker was able stealing your money.
You must be careful there are so many fake software. So many people got hacked caused by they were accessing the program that already had keylogger on it.