If your wallet has been hacked and it was only stored on your computer, you should assume the attacker has compromised your computer. You could have any kind of malware on your PC now. Generating a new wallet file will NOT be enough, you need to do a full OS reinstall and then generate a new wallet.
Did you install any software on your PC recently? anything bitcoin-related (price tickers, widgets, altcoins)? where did you download your wallet software from?
I have lot of sw on my PC. So i take new laptop with new OS ane crate new wallet. This laptop is dedicated only to BTC. So i think this topic should be closed. I have no clue how this could happened. No security alarm of any security SW.
I oly saw that adress 17gH1u6VJwhVD9cWR59jfeinLMzag2GZ43 belongs to some hackers/thieves beacuse I am not the only one who was robbed...
https://www.bitcoinregime.com/2014/07/07/stolen-bitcoins-and-releated-account/