ET RETIRED Red Wolf/RedCurl Implant Checkin

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET RETIRED Red Wolf/RedCurl Implant Checkin";
    flow:established,to_server;
    pcre:"/Content-[Tt]ype\x3a\x20/H";
    http.method;
    content:"POST";
    http.uri;
    content:"/";
    http.content_type;
    content:"application/x-www-form-urlencoded";
    http.request_body;
    content:"Lg0KLi4NC"; fast_pattern;
    pcre:"/(ZGVza3RvcC5pbm|Rlc2t0b3AuaW5p|kZXNrdG9wLmlua)/R";
    reference:md5,b7a633613d95dedd57775dcbb72accc7;
    reference:url,bi.zone/eng/expertise/blog/red-wolf-vnov-shpionit-za-kommercheskimi-organizatsiyami/;
    reference:url,www.facct.ru/blog/redcurl-2023/;
    classtype:trojan-activity;
    sid:2047961; rev:2;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_and_Server, created_at 2023_09_07, deployment Perimeter, deployment SSLDecrypt, former_category MALWARE, performance_impact Low, confidence High, signature_severity Major, tag Red_Wolf, tag RedCurl, updated_at 2025_04_17, reviewed_at 2025_04_17;
    target:src_ip;
)