ET PHISHING Suspicious Dropbox Page - Possible Phishing Landing

alert http $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET PHISHING Suspicious Dropbox Page - Possible Phishing Landing";
    flow:to_client,established;
    http.stat_code;
    content:"200";
    http.content_type;
    content:"text/html"; startswith;
    file.data;
    content:"<title>Dropbox"; fast_pattern;
    content:"<form"; distance:0; nocase;
    content:"password"; nocase; distance:0;
    content:!"_csp_external_script_nonce";
    content:!"when_ready_configure_requirejs"; distance:0;
    content:!"DETERMINISTIC_MONKEY_CHECK"; distance:0;
    content:!"<title>Dropbox Status</title>";
    classtype:social-engineering;
    sid:2025659; rev:5;
    metadata:affected_product Web_Browsers, attack_target Client_Endpoint, created_at 2016_08_29, deployment Perimeter, confidence Medium, signature_severity Critical, tag Phishing, updated_at 2021_12_09, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1566, mitre_technique_name Phishing;
)