alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET INFO External IP Lookup HTTP Request (ip .dnsexit .com)"; flow:established,to_server; http.method; content:"GET"; http.host; content:"ip.dnsexit.com"; bsize:14; fast_pattern; classtype:misc-activity; sid:2034899; rev:2; metadata:attack_target Client_Endpoint, created_at 2022_01_12, deployment Perimeter, performance_impact Low, confidence High, signature_severity Informational, updated_at 2022_01_12, mitre_tactic_id TA0007, mitre_tactic_name Discovery, mitre_technique_id T1614, mitre_technique_name System_Location_Discovery;)