if your wallet got hacked by someone, i think you should use other wallet instead, it's just not worth it risking your money over having the same wallet again.
moreover generating wallet is just very easy so don't sweat about it and just use the newer ones instead.
Exactly, what is the point of trying to restore or secure the same wallet that has been hacked and your funds were stolen? for that to have happened that means they own that wallet now too since they can easily reimport the wallet and reset the password again. I don't believe you can change the passphrase and if that is what they have, it is better for OP to just create another wallet and many options available too.