Rule History

alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed Poseidon Stealer Related Domain (agov-ch .net) in TLS SNI"; flow:established,to_server; tls.sni; bsize:11; content:"agov-ch.net"; fast_pattern; reference:url,github.com/govcert-ch/CTI/tree/main/20240627_macOS_PoseidonStealer; classtype:trojan-activity; sid:2054210; rev:2; metadata:affected_product Mac_OSX, attack_target Client_Endpoint, created_at 2024_07_01, deployment Perimeter, malware_family Poseidon_Stealer, performance_impact Low, confidence High, signature_severity Major, updated_at 2024_10_04, reviewed_at 2024_10_04;)