alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"ET EXPLOIT Possible Ticketbleed Client Hello (CVE-2016-9244)"; flow:established,to_server; flowbits:set,ET.ticketbleed; flowbits:noalert; content:"|16 03|"; depth:2; content:"|01|"; distance:3; within:1; content:"|03 03|"; distance:3; within:2; byte_test:1,<,32,32,relative; byte_test:1,>,1,32,relative; reference:cve,2016-9244; reference:url,filippo.io/Ticketbleed; classtype:misc-attack; sid:2023896; rev:5; metadata:affected_product HTTP_Server, attack_target Server, created_at 2017_02_10, deployment Datacenter, performance_impact Moderate, confidence Medium, signature_severity Major, updated_at 2024_03_14;)