Versions (4)
Version DetailsCurrent
Rev: 1 • Aug 11, 2023, 12:00 PMET INFO Observed External IP Lookup Domain (whois .pconline .com .cn in TLS SNI)
alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET INFO Observed External IP Lookup Domain (whois .pconline .com .cn in TLS SNI)"; flow:established,to_server; tls.sni; bsize:21; content:"whois.pconline.com.cn"; fast_pattern; classtype:external-ip-check; sid:2047622; rev:1; metadata:attack_target Client_Endpoint, created_at 2023_08_11, deployment Perimeter, performance_impact Low, confidence High, signature_severity Informational, updated_at 2023_08_11, reviewed_at 2024_03_11, mitre_tactic_id TA0007, mitre_tactic_name Discovery, mitre_technique_id T1614, mitre_technique_name System_Location_Discovery;)
Aug 11, 2023, 12:00 PM
Aug 11, 2023, 12:00 PM
Sep 21, 2024, 3:00 AM
Feb 16, 2026, 10:35 PM
rules/emerging-info.rules