Oh snap... I just realised you said the * was at the end of the "pass"! 
It likely is a Base64 representation of some encoded text... I was experimenting here: https://encode-decode.com/blowfish-encrypt-online/
and discovered that with a 12 character password ("password1234"), there are several encryption algorithms like Blowfish, des, cast etc that return 76 character encrypted text when you encrypt a private key.
ie. Blowfish:
Now, I DO NOT recommend that you go an put your cipher text and password into some random encoder/decoder website like this... but it might be worth seeing if you can find some reputable encryption tools that you can use to try testing various encryption algorithms with your cipher text+password.
It likely is a Base64 representation of some encoded text... I was experimenting here: https://encode-decode.com/blowfish-encrypt-online/
and discovered that with a 12 character password ("password1234"), there are several encryption algorithms like Blowfish, des, cast etc that return 76 character encrypted text when you encrypt a private key.
ie. Blowfish:
Code: (private key)
L5RGSf2pShsFAbtUXeQwdsCWWuo4qLkaVaSJX2nVCTupAxhCU3Gk
Code: (password)
password1234
Code: (blowfish cipher text)
BT33LMVnYpnNk+eCy32KI3aQaBzeH8TQZtUvs0WZ1TO5ndJGiBP0JcnNq9WsKRNH8icgHWeCbAQ=
Now, I DO NOT recommend that you go an put your cipher text and password into some random encoder/decoder website like this... but it might be worth seeing if you can find some reputable encryption tools that you can use to try testing various encryption algorithms with your cipher text+password.