alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET POLICY External IP Lookup Request"; flow:established,to_server; urilen:1; http.method; content:"GET"; http.host; content:"www.shmyip.com"; fast_pattern; endswith; reference:md5,0b14eedcc9e847a2d20abf409c8b505f; classtype:external-ip-check; sid:2027430; rev:4; metadata:attack_target Client_Endpoint, created_at 2019_06_04, 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;)