I run windows 7 on the machine in question.
I also just noticed that the hack is still ongoing.
I mine at elgius, so there was a pending payout due.
After discovering the hack I immediately changed my wallet passphrase, changed all my mining payout addresses,
Then, this morning another of my daily mining proceeds were again diverted again to the same address.
I have stopped my proceeds going to my address (this is MY address that was hacked 1M2yzo3YU5RDGtMnqWMANcSij7r7n9rbCL)
Payments are now going to another address that is working and un atached to thsi wallet.
I wish I could recover the funds - but more importantly figure out where I have been compromised. I'm thinking a very good keylogger attached to a windows service, or masked as a windows service (svchost.exe) or something. AV (malwarebytes chameleon comes up clean) MS antivirus clean as well.
upsetting to say the least.
I am using bitcoin qt, latest version. I'm stumped as to how they got my priv key. I have not had reason to use it in a few weeks. My wallet is encrypted, and strong passphrase.
Also,
The address above is not mine, that is where the funds were sent to. I'm stumped! I would say- if I was careless, I deserve it, but I'm not careless with my wallet....
I ran the transactions on your address through a script that check's for k-reuse in signatures, it doesn't look like that was the case here..
What OS do you run? Download any new but unverified bitcoin related software lately?