alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET POLICY External IP Lookup (www .net .cn)"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/static/customercare/yourip.asp"; depth:31; endswith; fast_pattern; http.host; content:"www.net.cn"; reference:md5,51bdd385ab780d1efd1a62129f066edf; classtype:external-ip-check; sid:2027786; rev:4; metadata:attack_target Client_Endpoint, created_at 2019_08_01, 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;)