This is Steam. Got a message that someone made a purchase on Dota 2 market with my account, getting me out of money there. Steam guard active, no suspicious connections or malware.

Steam Support response (copy/paste sent to many more people).

Thanks for making able free scam.

"Hello,

Thank you for contacting Steam Support.

I understand your frustration but if activity occurred on your account you do not recognize, it may mean your account or computer has been compromised.

Someone may have gained access to your Steam account through spoofing, phishing, or malware.

As an immediate first step, you should take some action to secure your Steam account from further access. Our article on account security recommendations is a good start toward securing your Steam account.

If you suspect your computer is infected with malware, we have some tips for removing malware from your computer here. It may be a good idea to contact a local computer security expert if you're having trouble removing this malware.

Additionally, all Community Market transactions are final and cannot be reversed or refunded. When an item is purchased from the Community Market, the cost is sent from the buyer's Steam wallet to the seller's. Reversing these purchases would mean we have to take funds out of the seller's wallet, creating confusion and possible purchasing issues across Steam.

I'm sorry we can't be of more help with this, but we don't reverse or refund Community Market purchases and sales. "