It is a password I no longer use and is therefore irrelevant.
That password I linked to is the very one they used to get into your Origin account, so how is it irrelevant?
The most likely scenario is this: you posted your password on a site that is filled to the brim with scammers and fraudsters, namely bitcointalk. One lucky guy saw that and threw it into his automated "Try this username/password-combo with every known interesting system" script, got a positive from Origin then threw it into his list of "dudes I have the Origin login data for". This fits with the timeframe also. You posted your password, two weeks later it's on the Russian site.
At the time of signing up for Origin, in 2009, I had been using different passwords for each account I made. So it was unique. Again I am one of hundreds who had their Origin accounts, and solely those accounts stolen.