Quote from: jdany on July 09, 2015, 05:31:37 PM

I've been away for about a month. Most of my equipment was idle during that time.
I had my bitcoin-qt wallet open. I just changed batteries out in my mouse on that machine and I noticed a transaction on the 7th that drained my wallet.
I have no idea how it happened. I'm lost.

I had btc spread over 4 different addresses.
They were all drained, so, I know it was from this computer or from a backup of this wallet.
But, I can't figure out how.

I have a passcode on the wallet.
So, someone would have gotten access to my computer remotely, or in person.
And, gotten my passcode somehow to transfer this out.
Both are pretty unlikely.

I'm so confused.

0.10.0

---> 1C9z6tzLVMySeBoTgfW1Nbcpzf7iNwBrDe

The address mentioned has been cleaned out - https://blockchain.info/address/1C9z6tzLVMySeBoTgfW1Nbcpzf7iNwBrDe . It has 81 conformations so it's to late to try to stop it. Sadly it is gone.

I would run some anti-virus and malaware scans. There is a good chance something is on your computer. If your going to use a wallet on a computer you use for everyday things you really need 2 factor authentication.

Assuming your passcode was the same and did not chance. A virus/malware could get the passcode and then proceed to steal BTC. Sadly "bad guys" target crypto wallets.