ET MALWARE Earth Preta PUBLOAD Activity M1

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Earth Preta PUBLOAD Activity M1";
    flow:established,to_server;
    urilen:1;
    http.method;
    content:"POST";
    http.header_names;
    content:!"Referer";
    http.request_body;
    content:"|17 03 03|"; startswith; fast_pattern;
    byte_jump:2,0,relative,post_offset -1;
    isdataat:!2,relative;
    reference:url,www.trendmicro.com/en_us/research/23/c/earth-preta-updated-stealthy-strategies.html;
    reference:url,url,www.trendmicro.com/en_us/research/22/k/earth-preta-spear-phishing-governments-worldwide.html;
    classtype:trojan-activity;
    sid:2047019; rev:2;
    metadata:attack_target Client_Endpoint, created_at 2023_08_02, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, updated_at 2024_01_03, reviewed_at 2024_03_29;
    target:src_ip;
)