alert tcp $EXTERNAL_NET 443 -> $HOME_NET any (msg:"ET MALWARE SSL Cert Used In Unknown Exploit Kit"; flow:established,from_server; content:"|16 03|"; content:"|0b|"; distance:3; within:1; byte_extract:3,0,Certs.len,relative; content:"|55 04 0a 0c 0C|The Internet"; distance:3; within:Certs.len; content:"|55 04 03 0c 03|web"; distance:0; classtype:exploit-kit; sid:2015718; rev:2; metadata:attack_target Client_Endpoint, created_at 2012_09_20, deployment Perimeter, confidence Medium, signature_severity Major, tag SSL_Malicious_Cert, updated_at 2019_07_26;)