alert http $HOME_NET any -> $EXTERNAL_NET 6003 (msg:"ET MALWARE Win32/Sinresby.B Checkin"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/data?mac="; startswith; fast_pattern; content:"&ip="; distance:17; within:4; content:"&id="; distance:0; http.accept_lang; content:"zh-cn"; http.accept_enc; content:"identity"; reference:md5,9a1ed2cca63a687653819fa6d96a295f; classtype:trojan-activity; sid:2046714; rev:1; metadata:attack_target Client_Endpoint, created_at 2023_06_30, deployment Perimeter, malware_family Win32_Sinresby_B, performance_impact Low, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_06_30;)