ET HUNTING Generic RPC Endpoint with Auth Header Command Injection Attempt

alert http any any -> $HOME_NET any (
    msg:"ET HUNTING Generic RPC Endpoint with Auth Header Command Injection Attempt";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:"/rpc"; fast_pattern;
    http.header;
    content:"Authorization|3a 20|Basic";
    pcre:"/^[^\x0d\x0a]*?(?:(?:\x3b|%3[Bb])|(?:\x60|%60)|(?:\x7c|%7[Cc])|(?:\x24|%24))+/R";
    reference:url,www.ipbuf.com/static/cve/2025/CVE-2025-67038_en.html;
    reference:cve,2025-67038;
    classtype:attempted-admin;
    sid:2072405; rev:1;
    metadata:affected_product Lantronix, attack_target Networking_Equipment, tls_state plaintext, created_at 2026_10_09, cve CVE_2025_67038, deployment Perimeter, deployment Internal, performance_impact Moderate, confidence Medium, signature_severity Major, tag Exploit, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2026_10_09, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;
    target:dest_ip;
)