ET MALWARE TA416 PlugX CnC Activity (GET)

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE TA416 PlugX CnC Activity (GET)";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri; bsize:>90;
    pcre:"/^\x2f(?:[a-zA-Z0-9]{2,20}\x3f)|(?:[a-zA-Z0-9]{4}\x3d)/";
    http.user_agent; bsize:1;
    content:"M";
    http.cookie;
    pcre:"/^(?:[a-zA-Z0-9]{1,12}\x3d)/";
    content:"|3b|token="; distance:0;
    http.header_names;
    content:!"|0d 0a|Referer|0d 0a|";
    http.header;
    content:"User|2d|Agent|3a 20|M|0d 0a|"; fast_pattern;
    classtype:command-and-control;
    sid:2068413; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2026_01_05, deployment Perimeter, deployment SSLDecrypt, confidence High, signature_severity Critical, tag c2, tag TA416, updated_at 2026_03_25, former_sid 2865578, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;
    target:src_ip;
)