alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET POLICY External IP Lookup via ad4989 .co .kr"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/ipcheck.asp"; endswith; http.host; content:".ad4989.co.kr"; endswith; fast_pattern; classtype:policy-violation; sid:2034090; rev:3; metadata:attack_target Client_Endpoint, created_at 2021_10_01, deployment Perimeter, performance_impact Low, confidence High, signature_severity Informational, updated_at 2024_11_26, reviewed_at 2024_01_08, mitre_tactic_id TA0007, mitre_tactic_name Discovery, mitre_technique_id T1614, mitre_technique_name System_Location_Discovery;)