alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed Elysium Stealer Domain (phonefix .bar in TLS SNI)"; flow:established,to_server; tls.sni; content:"phonefix.bar"; bsize:12; fast_pattern; reference:url,twitter.com/hatching_io/status/1437431372537282566?s=20; reference:url,tria.ge/210913-nebwkaded5; classtype:domain-c2; sid:2033972; rev:1; metadata:attack_target Client_Endpoint, created_at 2021_09_16, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_09_16, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)