ET MALWARE Proyecto RAT Variant - Yopmail Login attempt (set)

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Proyecto RAT Variant - Yopmail Login attempt (set)";
    flow:established,to_server;
    flowbits:set,ET.Proyecto.YopmailLogin;
    flowbits:noalert;
    http.method;
    content:"GET";
    http.uri;
    content:"/es/inbox.php?login=";
    content:"&p=";
    content:"&d=&ctrl=&scrl=&spam=true&yf="; distance:1; within:29; fast_pattern;
    http.host;
    content:"www.yopmail.com";
    http.header_names;
    content:!"|0d 0a|Referer|0d 0a|";
    reference:md5,295d31fd532ed0257149b191146b5236;
    reference:url,blog.trendmicro.com/trendlabs-security-intelligence/spam-campaign-targets-colombian-entities-with-custom-proyecto-rat-email-service-yopmail-for-cc/;
    classtype:trojan-activity;
    sid:2027734; rev:3;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_07_19, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag RAT, updated_at 2020_08_31;
)