ET MALWARE Clipsa Stealer - CnC Checkin

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Clipsa Stealer - CnC Checkin";
    flow:established,to_server;
    threshold:type limit, track by_src, count 1, seconds 30;
    http.method;
    content:"POST";
    http.uri;
    content:"/wp-content/plugins/WPSecurity/load.php"; depth:39; fast_pattern; endswith;
    http.request_body;
    pcre:"/^[a-zA-Z0-9]+$/";
    http.content_type;
    content:"application/x-www-form-urlencoded";
    http.content_len;
    byte_test:0,<=,400,0,string,dec;
    http.header_names;
    content:!"Referer";
    reference:md5,7e52633ffa2c3aee03e8b26f03e07cc4;
    reference:url,decoded.avast.io/janrubin/clipsa-multipurpose-password-stealer/;
    classtype:command-and-control;
    sid:2027893; rev:4;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_08_16, deployment Perimeter, malware_family Clipsa, performance_impact Low, confidence High, signature_severity Major, tag Stealer, updated_at 2020_09_17;
)