Posted by user8446 on Jan 13, 2019; 4:25pm
URL: https://itus.accessinnov.com/Make-your-own-rule-in-a-graphical-way-tp1709.html

Just came across this - you can make your own Snort rule in a graphical way in a web based tool called Snorpy and then add it to your custom rules:

https://isc.sans.edu/diary/rss/24522