Talos has added and modified multiple rules in the malware-cnc, os-windows, policy-other, protocol-other and server-webapp rule sets. The rules provide coverage for a bug in a popular WordPress plugin called “Ad Inserter” Talos urges all users to implement these rules as soon as possible to keep their networks and machines protected. You can subscribe to Talos’ newest rule detection functionality for as low as $29 a year with a personal account.”]
Source: https://blog.snort.org/2019/07/snort-rule-update-for-july-18-2019.html

