ET MALWARE MSIL/Filecoder.EK CnC Checkin

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE MSIL/Filecoder.EK CnC Checkin";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:"/secure.php?hero="; startswith; fast_pattern;
    content:"&movie="; distance:0;
    http.header;
    content:"100-continue";
    http.header_names;
    content:!"|0d 0a|Referer|0d 0a|";
    reference:md5,7e47426d5ae73cc0d3ca3ca6008b2131;
    classtype:command-and-control;
    sid:2037846; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_07_28, deployment Perimeter, malware_family MSIL_Filecoder_EK, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_07_28, reviewed_at 2025_01_06;
)