ET EXPLOIT Dahua Netkeyboard Authentication Bypass Attempt M1 (DHIP) (CVE-2021-33044)

alert tcp any any -> $HOME_NET any (
    msg:"ET EXPLOIT Dahua Netkeyboard Authentication Bypass Attempt M1 (DHIP) (CVE-2021-33044)";
    flow:established,to_server;
    content:"|20 00 00 00|DHIP"; startswith; fast_pattern;
    content:"|22|method|22 3a|";
    content:"|22|global.login|22|"; within:20;
    content:"|22|params|22 3a|";
    content:"|22|userName|22 3a|";
    content:"|22|admin|22|"; within:15;
    content:"|22|password|22 3a|";
    content:"|22|loginType|22 3a|";
    content:"|22|Direct|22|"; within:15;
    content:"|22|clientType|22 3a|";
    content:"|22|NetKeyboard|22|"; within:20;
    content:"|22|authorityType|22 3a|";
    content:"|22|Default|22|"; within:15;
    content:"|22|passwordType|22 3a|";
    content:"|22|Default|22|"; within:15;
    reference:url,packetstorm.news/files/id/164423;
    reference:cve,2021-33044;
    classtype:attempted-admin;
    sid:2068363; rev:1;
    metadata:affected_product Dahua, attack_target Networking_Equipment, tls_state plaintext, created_at 2026_03_20, cve CVE_2021_33044, deployment Perimeter, deployment Internal, performance_impact Low, confidence High, signature_severity Major, tag Exploit, updated_at 2026_03_20, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;
    target:dest_ip;
)