Don't worry, I get them as soon as I get on the forum.

The initial spam thread asking about the spam program XRumer was the test run. Now it is probably all being run by a series of captcha defeating bots They are most likely using an open proxy server so if vbulletin allows you should ban all posts mentioning whatever they are spamming as that is the only effective way of eliminating the spam until the person in charge checks back in and notices it isn't working and decides to turn it off.