alert http $HOME_NET any -> any any (msg:"AT related malicious URL (text-on-whatsapp.com.cn/)"; flow:established,to_server; http.uri; content:"/"; startswith; fast_pattern; http.host; content:"text-on-whatsapp.com.cn"; endswith; reference:url,openphish.com; reference:url,julioliraup.github.io/ET/signature.html?sid=6004828; classtype:social-engineering; sid:6004828; rev:1; metadata:signature_severity Major, created_et 2026_05_21;)