Rule History

alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET INFO Observed URL Shortener Service Domain (u5p .cn in TLS SNI)"; flow:established,to_server; tls.sni; dotprefix; content:".u5p.cn"; endswith; fast_pattern; reference:url,u5p.cn/U/About; classtype:misc-activity; sid:2044717; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_03_21, deployment Perimeter, confidence High, signature_severity Informational, updated_at 2023_03_21, reviewed_at 2024_10_14;)