Did you log into your bitcointalk account from the same computer that you downloaded the alleged malicious attachment? Do you have an AV?
How strong was your wallet password? Did you use the same wallet password for anything else? Did you have your wallet password stored in plaintext anywhere on your computer?
Txids of the transactions?
I have Norton on my computer and it blocked the malware or so I thought. But then the next day I checked my wallets and all my coin was transferred out. I don't have the pw of the wallet written down so don't know how they got past that. Really sad.
txids 5511a16add0a44869791175d9849567f846d7a8662e4775c1783567863203d34