alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Malicious SSL Certificate detected (PyXie)"; flow:established,to_client; tls.cert_subject; content:"CN=planlamaison.com"; bsize:19; fast_pattern; reference:url,threatvector.cylance.com/en_us/home/meet-pyxie-a-nefarious-new-python-rat.html; classtype:domain-c2; sid:2029085; rev:1; metadata:attack_target Client_and_Server, created_at 2019_12_02, deployment Perimeter, performance_impact Low, confidence Medium, signature_severity Major, tag SSL_Malicious_Cert, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_12_02, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)