Versions (3)
Version DetailsCurrent
Rev: 1 • Jan 22, 2024, 12:00 PMET INFO Observed External IP Lookup Domain (ip-info .ff .avast .com) in TLS SNI
alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET INFO Observed External IP Lookup Domain (ip-info .ff .avast .com) in TLS SNI"; flow:established,to_server; tls.sni; bsize:20; content:"ip-info.ff.avast.com"; fast_pattern; reference:url,ip-info.ff.avast.com; classtype:misc-activity; sid:2050282; rev:1; metadata:affected_product Any, attack_target Client_Endpoint, created_at 2024_01_22, deployment Perimeter, performance_impact Low, confidence High, signature_severity Informational, updated_at 2024_01_22, mitre_tactic_id TA0007, mitre_tactic_name Discovery, mitre_technique_id T1614, mitre_technique_name System_Location_Discovery;)
Jan 22, 2024, 12:00 PM
Jan 22, 2024, 12:00 PM
Sep 21, 2024, 3:00 AM
Feb 16, 2026, 10:35 PM
rules/emerging-info.rules