Rule History

alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed Aura Stealer Domain (mscloud .cfd in TLS SNI)"; flow:established,to_server; tls.sni; dotprefix; content:".mscloud.cfd"; endswith; fast_pattern; reference:md5,2fc8158f220185e6f5b980e899f2cd55; classtype:trojan-activity; sid:2065856; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2025_11_20, deployment Perimeter, deployment SSLDecrypt, malware_family AuraStealer, confidence High, signature_severity Critical, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_11_20, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)