vb.org Archive - porblem in vbattachment someone upload shells?

good morning

i had vb 3.0.7 and i upgrade it to 3.5.3

bfore upgrading i sperate the attachment from the database and i put all attachmen in folder called vbattach with 777 permission .
yesterday i went to the cpanel and i try to check if there is a virous or any kind of patches .
i founded one in the vbattach ? i try to delet it gave no permssion to delet or edit . someone upload a big folder that has more than 5 shell files ?
u can see in this snap
http://dm3ty.net/uploader/uploads/virus.jpg
also in find inside his folder there is a folder for all my files 3.5.3 and 3.0.9 as u see in the snap ?

i don't kown what i can do now ?

this is tha folder that has all shell files ? is called .allhtmle and .allhtmle.tar.gz
http://dm3ty.net/uploader/uploads/1138247481_sssss.jpg

by the wat i generate a full backup one week ago and i delet from the website.

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