alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Enigma Stealer CnC Checkin"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/gate.php?"; content:"hwid="; pcre:"/^[a-f0-9]{8}-(?:[a-f0-9]{4}-){3}[a-f0-9]{12}/R"; content:"filename="; content:"Str=1&desc="; fast_pattern; http.user_agent; pcre:"/^[A-F0-9]{8}-(?:[A-F0-9]{4}-){3}[A-F0-9]{12}$/"; reference:md5,505e7b77cba9c4a64ac2827d86c68427; classtype:trojan-activity; sid:2043420; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_01_20, deployment Perimeter, malware_family Win32_Enigma, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_01_20;)