alert http $HOME_NET any -> any any (msg:"AT related malicious URL (whapptr2.com.cn/)"; flow:established,to_server; http.uri; content:"/"; startswith; fast_pattern; http.host; content:"whapptr2.com.cn"; endswith; reference:url,openphish.com; reference:url,julioliraup.github.io/AT/signature.html?sid=6014247; classtype:social-engineering; sid:6014247; rev:1; metadata:signature_severity Major, created_et 2026_06_19, updated_et 2026_06_25;)