alert dns $HOME_NET any -> any any (msg:"ET MALWARE Win32/Lumma Stealer Related CnC Domain in DNS Lookup (osberverynsb .biz)"; dns.query; bsize:16; content:"osberverynsb.biz"; fast_pattern; nocase; reference:md5,400af20bb680795b1a047b588d8f1b26; classtype:domain-c2; sid:2056667; rev:3; metadata:attack_target Client_Endpoint, created_at 2024_10_15, deployment Perimeter, deployment Internal, deprecation_reason Age, malware_family Lumma_Stealer, performance_impact Low, confidence High, signature_severity Major, updated_at 2025_03_07, reviewed_at 2025_03_07, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol; target:src_ip;)