Versions (5)
Version DetailsCurrent
Rev: 5 • Feb 7, 2018, 12:00 PMET POLICY Possible External IP Lookup Domain Observed in SNI (ipinfo. io)
alert tls $HOME_NET any -> $EXTERNAL_NET 443 (msg:"ET POLICY Possible External IP Lookup Domain Observed in SNI (ipinfo. io)"; flow:established,to_server; tls.sni; content:"ipinfo.io"; bsize:9; fast_pattern; classtype:external-ip-check; sid:2025331; rev:5; 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 2018_02_07, 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;)
Feb 7, 2018, 12:00 PM
Sep 19, 2024, 12:00 PM
Sep 21, 2024, 3:00 AM
Feb 16, 2026, 10:35 PM
rules/emerging-policy.rules