ET WEB_SPECIFIC_APPS GL.iNet add_user API Request - Backdoor root User Attempt

alert http $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET WEB_SPECIFIC_APPS GL.iNet add_user API Request - Backdoor root User Attempt";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:"/rpc";
    http.request_body;
    content:"|7b 22|jsonrpc|22 3a|"; startswith;
    content:"|22|2.0|22 2c|"; distance:0; within:10;
    content:"|22|method|22 3a|";
    content:"|22|call|22 2c|"; distance:0; within:20;
    content:"|22|params|22 3a 5b|";
    content:"|22|system|22 2c|"; distance:0; within:50;
    content:"|22|add_user|22 3c|"; distance:0; within:30;
    content:"|7b 22|username|22 3a|";
    content:"|3a|0|3a|0|3a|root|3a|/root|3a|"; distance:0; within:100;
    reference:url,libdzonerzy.so/articles/from-zero-to-botnet-glinet.html;
    classtype:attempted-admin;
    sid:2049927; rev:1;
    metadata:affected_product GL_iNet, attack_target Networking_Equipment, created_at 2024_01_05, deployment Perimeter, deployment Internal, deployment SSLDecrypt, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_01_05, reviewed_at 2024_10_03;
    target:dest_ip;
)