alert dns $HOME_NET any -> any any (msg:"ET POLICY External IP Lookup Domain (curlmyip .net in DNS lookup)"; dns.query; content:"curlmyip.net"; nocase; endswith; reference:md5,c375012865b94fa037d23c555e6c2772; classtype:external-ip-check; sid:2025154; rev:4; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Mac_OSX, affected_product Linux, attack_target Client_Endpoint, created_at 2017_12_16, deployment Perimeter, performance_impact Low, confidence High, signature_severity Informational, updated_at 2024_09_19, mitre_tactic_id TA0007, mitre_tactic_name Discovery, mitre_technique_id T1614, mitre_technique_name System_Location_Discovery;)