ET MALWARE SideCopy APT Related Backdoor Sending System Information (POST)

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE SideCopy APT Related Backdoor Sending System Information (POST)";
    flow:established,to_server;
    urilen:13;
    http.method;
    content:"POST";
    http.uri;
    content:"/user_details"; fast_pattern;
    http.content_type;
    content:"boundary=--cpp-httplib-multipart-";
    http.user_agent;
    content:"cpp-httplib/"; startswith;
    http.header_names;
    content:!"Referer";
    http.request_body;
    content:"name=|22|ID|22 0d 0a|";
    content:"name=|22|Vesrion|22 0d 0a|"; distance:0;
    content:"name=|22|AV|22 0d 0a|"; distance:0;
    content:"name=|22|OS|22 0d 0a|"; distance:0;
    reference:url,twitter.com/suyog41/status/1633822870601363457;
    reference:md5,2e19b7a2bbdc8082024d259e27e86911;
    classtype:trojan-activity;
    sid:2044540; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2023_03_09, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_03_09;
    target:src_ip;
)