alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Possible Unknown Trojan Checkin Jan 26 2017"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/config.php?id="; fast_pattern; pcre:"/\/config\.php\?id=(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=|[A-Za-z0-9+/]{4})+/"; http.header_names; content:!"|0d 0a|User-Agent|0d 0a|"; content:!"|0d 0a|Referer|0d 0a|"; content:!"|0d 0a|Accept"; reference:md5,2ccd95bb2e9d8c6e6b6eb68963461f08; classtype:command-and-control; sid:2023769; rev:4; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2017_01_27, deployment Perimeter, performance_impact Low, confidence Medium, signature_severity Major, updated_at 2024_03_04;)