alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE MSIL/SamMiner CnC Checkin M1"; flow:established,to_server; http.method; content:"GET"; http.uri; content:".php?act=hi&uid="; fast_pattern; content:"&ver="; content:"&dotnetver="; content:"&onwork="; http.header_names; content:!"Referer"; content:!"User-Agent"; reference:md5,baa89d17522df0e05a16fa2c23d58f58; classtype:command-and-control; sid:2025235; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2018_01_22, deployment Perimeter, malware_family MSIL_SamMiner, performance_impact Moderate, confidence High, signature_severity Major, updated_at 2020_08_24;)