In this session, we look at the timeline, analysis, and solution implemented for a sudden attack by spammers. Suddenly, the number of newly registered users in our system spiked. We could see that these new users were likely spam-bots. It was a more sophisticated attack than earlier seen as captcha and email-verification were bypassed. We already had some countermeasures in place, but needed a quick and cost-effective solution. Running on AWS we used lambda@edge and Web Application Firewall to stop 99% of the spammers within a very short time-frame without changes to the original system.