alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET POLICY External IP Lookup Domain (up .jkc8 .com)"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/getip.aspx"; endswith; http.user_agent; content:"sjd32DSKJF9Ssf"; depth:14; fast_pattern; http.host; content:"up.jkc8.com"; http.header_names; content:!"Referer"; reference:md5,5a7526db56f812e62302912a1c20edd2; classtype:external-ip-check; sid:2026216; rev:5; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2018_09_19, deployment Perimeter, performance_impact Low, confidence High, signature_severity Informational, tag IP_address_lookup_website, updated_at 2024_09_19, mitre_tactic_id TA0007, mitre_tactic_name Discovery, mitre_technique_id T1614, mitre_technique_name System_Location_Discovery;)