alert dns $HOME_NET any -> any any (msg:"ET INFO External IP Lookup Domain (ip-api .io) in DNS Lookup"; dns.query; bsize:9; content:"ip-api.io"; nocase; classtype:external-ip-check; sid:2039045; rev:2; metadata:affected_product Any, attack_target Client_Endpoint, created_at 2022_09_29, deployment Perimeter, performance_impact Low, confidence High, signature_severity Informational, updated_at 2024_03_26, reviewed_at 2024_09_18, mitre_tactic_id TA0007, mitre_tactic_name Discovery, mitre_technique_id T1614, mitre_technique_name System_Location_Discovery;)