alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Observed Malicious SSL Cert (PhantomNet/Smanager CnC)"; flow:established,to_client; tls.cert_subject; bsize:94; content:"C=AU, ST=Hello, L=China, O=Microsoft, OU=dirweb, CN=secfire/emailAddress=iunkown1987@gmail.com"; fast_pattern; reference:url,insight-jp.nttsecurity.com/post/102glv5/pandas-new-arsenal-part-3-smanager; classtype:domain-c2; sid:2031448; rev:2; metadata:attack_target Client_and_Server, created_at 2020_12_22, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag SSL_Malicious_Cert, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_03_25, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)