Ethos ethermine wallet. Does it create wallet?

Not sure if I am posting this in right place.

Hello everyone. A year ago I used to mine ethereum on a rig that used EthOs. I sold the power supply and the cards on the rig a year ago(big regret), but I discovered I have a balance of 1.8 ethereum when I clicked on my old address link. I have a key file and installed v.9.3 ethereum wallet a few days ago and its showing the balance in what is says to be an etherbase address. But I can't send anything because it needs a password, and I don't remember setting one up.

Its been so long, I can't remember if ethos (that was preinstalled on my rig) created my wallet for me or how the etherbase wallet was created. Does ethos create the wallet? Does it encrypt it with a password? Any suggestions on how to get password? I probally have old miner ip address. Help would greatly be appreciated, thats about 2 grand of money locked up.

Thanks in advance!