For serious, change your Steam and Steam forum password right now. I’ll wait.
Are you done? Good. A recent hack to the Steam forums has been used to spread links to a hacker website, apparently in a case of site assassination by proxy. The owners of the hacker site deny any attacks against Steam, and have taken their own site offline. Kotaku has the story.
It’s kind of like how Skynet launched nukes at Russia so the return strike would destroy its enemies at home. Hackers use false flag operations all the time to send the authorities after their rivals. Just part of the wonderful world of underground computing. Oh, and change your password.