virus on forum?

[mofeu]

Suddenly without doing nothing ,
not new plugins or not something else ,
the google sent me an e-mail that I have virus on my forum
and the avast also at this location mofeu.eu/forum/misc.php?show=vsaanp_newposts

Could someone say to me what to do ?

[Kane@airrifle]

Seems to be an epidemic of late; filestore hack.

Resources:
https://www.vbulletin.com/forum/forum/vbulletin-4/vbulletin-4-questions-problems-and-troubleshooting/4020207-please-help-hacked-vbulletin-redirect-to-filestore72-info

https://clients.urljet.com/knowledgebase/147/Fix-HOW-TO-FIX---Vbulletin-redirecting-to-filestore123com-version-2.html

https://clients.urljet.com/knowledgebase/138/Fix-vBulletin-4xx-Filestore123-Hack.html