alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE ZPHP CnC Domain in TLS SNI (ipva2024-detransp .com)"; flow:established,to_server; tls.sni; bsize:21; content:"ipva2024-detransp.com"; fast_pattern; reference:url,www.proofpoint.com/us/blog/threat-insight/are-you-sure-your-browser-date-current-landscape-fake-browser-updates; reference:url,infosec.exchange/@monitorsg/112960459719109051; classtype:domain-c2; sid:2055802; rev:1; metadata:created_at 2024_09_09, performance_impact Low, confidence High, signature_severity Critical, tag compromised_website, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_09_09, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)