Those funds are most likely gone unless the hackers do something really, really stupid which I doubt they will especially after conducting such a well-coordinated attack. Most cases usually resolve in this manner in the cryptocurrency world sadly.
I know about that fact but likely does not mean certainly and even there is small chance to get the fund back, why don't try it. In addition, I am realistic that there is no chance for getting 100% of hacked fund back but getting a part of it is quite possible, especially if hackers had stablecoins which can be easily frozen by stablecoin issuers.
Hackers are not free from fund freeze and legal issues, it's only we mostly fail to catch them and trace their stolen fund money laundering after hacks.
They swapped USDT to TRX and to ETH.
Duelbits has pretty much returned with a 2.0 version, but they really need to improve their security protocols if they wish to avoid a 3.0 version, 4.0 version etc etc in the future.
It's very important and they will have to do that for their platform security after this hack.