I have a very low traffic Azure web app written in .net for sharing programming 'books' using a new medium that I created. Currently, I am really the only one creating content on the app.
For the second time in a few weeks I have had a bot (I am assuming) create an account and then use the forms on the app to create thousands of empty books.
After doing a little bit of research it looks like it is a spam referrer network. I am seeing www.acunetix-referrer.com in my logs coming from Ukraine.
My question is, what is the best way of preventing this on an Azure web app?