alert http $HOME_NET any -> $EXTERNAL_NET 8072 (msg:"ET MALWARE Win32/Packed.BlackMoon.A Variant Checkin"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/data?mac="; startswith; fast_pattern; content:"&ip="; distance:0; content:"id="; distance:0; http.user_agent; content:"|3b 20|Trident|2f|5|2e|0"; http.accept_lang; content:"zh-cn"; bsize:5; reference:md5,8d084af2e7a92c736db183680a4a4f0c; classtype:trojan-activity; sid:2045754; rev:1; metadata:attack_target Client_Endpoint, created_at 2023_05_17, deployment Perimeter, malware_family Win32_Packed_BlackMoon_A, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_05_17, reviewed_at 2024_12_11;)