Forum Forum being spammed through the PM system
 

Hello all. We have vBulletin® Version 3.7.3. We are being spammed thro the PM system. The PMs are like this -

"Dear, W R X;afigirl26;deepsea;cjlove;Sydney!

A virus alert was noticed on your computer.
We highly recommend you to check your computer and perform online virus check at our site immediately: http://security-tool2010.org/W R X;afigirl26;deepsea;cjlove;Sydney
If you do not pass this test* we will have to delete your account and forward a complaint to your Internet provider.
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Forum Administration "website removed""

Very annoying. Somehow theres some type of script out there that creates this. Is there a way to stop this? Thank you.