alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"🐾 - 🚨 Default Cobalt Strike 🏴‍☠️ TLS Certificate 🔒 observed"; flow:to_client, stateless; tls.cert_issuer; content:"C=Earth"; content:"ST=Cyberspace"; content:"L=Somewhere"; content:"O=cobaltstrike"; content:"OU=AdvancedPenTesting"; content:"CN=Major Cobalt Strike"; reference:url,https://malpedia.caad.fkie.fraunhofer.de/details/win.cobalt_strike; metadata:attack_target Client_and_Server, signature_severity Major, affected_product Windows_XP_Vista_7_8_10_11_Server_32_64_Bit, mitre_tactic_id TA0011, mitre_tactic_name Command_and_Control, mitre_technique_id T1071.001, mitre_technique_name Application_Layer_Protocol_Web_Protocols, created_at 2024_01_13, updated_at 2024_01_13; sid:3301119; rev:1; classtype:trojan-activity;)