A. I've fallen victim to some kind of malware scam.
B. I briefly installed Electrum when playing around with Bitcoin back in 2014 and it's somehow defaulted to those setup details (although none of my regular passwords are working),
C. It's a bug (unlikely).
For the record, I'm running on a Mac (sorry, probably should have stated initially).
Yes.
Not sure what else to do at this point.
I've attached a screenshot of the wallet/transaction details if that helps, let me know if anything else helps.
-snip-
Any ideas would be much appreciated but I know it's a long shot.
There's nothing to do if case A is true. If case B is true, you can only try to crack the password. There is literally nothing else to do.