alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed Malicious BOINC Server Domain (rosetta .cn in TLS SNI)"; flow:established,to_server; tls.sni; dotprefix; content:".rosetta.cn"; endswith; fast_pattern; reference:url,trac-labs.com/dont-ghost-the-socgholish-ghostweaver-backdoor-574154dd9983; reference:url,www.huntress.com/blog/fake-browser-updates-lead-to-boinc-volunteer-computing-software; classtype:domain-c2; sid:2060648; rev:1; metadata:attack_target Client_Endpoint, created_at 2025_03_05, deployment Perimeter, confidence High, signature_severity Major, tag ta569, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_03_05, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol_DNS;)