Per the security log, the OP's account was hacked at Today at 04:26:38 AM (GMT), and according the OgNasty's screenshot, he received a PM asking to send funds to 12SjeiierEgcZ7ipx2wm8H9QYR2peg8XZc abouut 4 minutes later.
That was not the first message he sent me with the address either. The first one was sent at: May 30, 2017, 4:14:18 AM (GMT).
That is weird. That is about 10 minutes before the OP's password changed the first time.
From the looks of it, the OP is most likely the victim of a phishing scam, hopefully this is not a lot of money for him, and this will serve as a not-too-expensive of a lesson to be careful about the links he clicks on and where he enters his passwords in the future. Less likely, however it is also possible that the OP and the hacker are the same person who was hoping to get OgNasty to cover losses as a result of the 'hack'
I would be open to coming to a different conclusion if additional evidence is presented, however I would find it unlikely that sufficient additional evidence will be presented.
