alert http $HOME_NET any -> any any (msg:"AT related malicious URL (admin.n19tk.app/index)"; flow:established,to_server; http.uri; content:"/index"; startswith; fast_pattern; http.host; content:"admin.n19tk.app"; endswith; reference:url,openphish.com; reference:url,julioliraup.github.io/AT/signature.html?sid=6016889; classtype:social-engineering; sid:6016889; rev:1; metadata:signature_severity Major, created_et 2026_07_02;)