alert dns $HOME_NET any -> any any (msg:"ET MALWARE TA397/Bitter CnC Domain in DNS Lookup"; dns.query; dotprefix; content:".esanojinjasvc.com"; nocase; endswith; reference:md5,f16f2e4317c37085cad630d41001f7c3; classtype:domain-c2; sid:2066320; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2025_12_15, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag TA397, updated_at 2025_12_15, mitre_tactic_id TA0037, mitre_tactic_name Command_And_Control, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;)