in order to replay to the last comment of the closed thread: http://www.vbseo.com/f3/hacked-url123-info-53045/
I have the redirection to file2store.info for the last 6 month and try to delete it.The solution is disabling Register Global on your server More on register_globals: PHP: Using Register Globals - Manual
We strongly advise everyone to contact your host and make sure to disable Register Global within PHP urgently
My register_globals = Off for the last years.
So this cannot be the resolution.
But today I deactivatet "vBSEO :: Suspicious Activity Tracker" in my ACP plugin list and the base64 entry in datastore / plugin list
I did not deleted it ... !!