Yes, the address is correct. I received 111 ETH from Bitcasino.io. I managed to transfer 28 ETH to a contract address (Kraken), and then the remaining 88 ETH was maliciously taken. The involvement of a smart contract is indeed peculiar, and if anyone has insights into this, I'd be grateful to hear them.
I am truly sorry for your loss but this whole thing is very strange to me.
You said that there was about $7k at that address earlier, but that the "hacker" (or whatever is behind it) did not touch that money, but was waiting for a larger amount. When that larger amount has arrived, he hesitates and allows you to transfer a solid part of that money (about 1/3) and only after that, he transfers the rest of the ETH.
This really doesn't look like a serious hacker to me, To me, this really doesn't look like a serious hacker, it's just that he would leave the possibility of saving $50-$60k.