Security in seo

I have an adult website. I pays security service (Sitelock) because I had a lot of malware. Except for the fact that they dont do anything(they didn't save us from malwares), can they have negative affect in organic traffic?

why all the virus are you letting users upload pics or video?

are you making sure the .ext is .img exr allowed only to be uploaded ?

for pic the .ext should be..

.img
.png
.jpeg

tell users that all above only allowed to be uploaded , then get a app or code that 're creates the image at your set size only and deleted the original image.

do this for video as well .

if done correctly then there no virus can be uploaded.