alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed GhostRedirector Domain (cs01 .shop) in TLS SNI"; flow:established,to_server; tls.sni; dotprefix; content:".cs01.shop"; endswith; fast_pattern; reference:url,www.welivesecurity.com/en/eset-research/ghostredirector-poisons-windows-servers-backdoors-side-potatoes/; classtype:trojan-activity; sid:2064401; rev:1; metadata:affected_product Microsoft_IIS, attack_target Web_Server, created_at 2025_09_05, deployment Perimeter, malware_family Rungan, performance_impact Low, confidence High, signature_severity Major, tag GhostRedirector, updated_at 2025_09_05, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1102, mitre_technique_name Web_Service;)