alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed Iris Stealer Domain (irisstealer .xyz) in TLS SNI"; flow:established,to_server; tls.sni; dotprefix; content:".irisstealer.xyz"; endswith; fast_pattern; reference:md5,f7f576d24d0d610bafa15fdae9012367; classtype:domain-c2; sid:2058115; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2024_12_06, deployment Perimeter, malware_family Iris_Stealer, performance_impact Low, confidence High, signature_severity Major, updated_at 2024_12_06, mitre_tactic_id TA0037, mitre_tactic_name Command_And_Control, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;)