ET PHISHING Possible Phishing Landing - Data URI Inline Javascript Mar 07 2016

alert http $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET PHISHING Possible Phishing Landing - Data URI Inline Javascript Mar 07 2016";
    flow:established,to_client;
    http.stat_code;
    content:"200";
    http.content_type;
    content:"text/html"; startswith;
    file.data;
    content:"data|3a|text/html|3b|"; fast_pattern;
    content:"|3b|base64,"; within:21;
    pcre:"/^[^\x22|\x27]+<\s*?script(?:(?!<\s*?\/\s*?script).)+?data\x3atext\/html\x3b(?:charset=UTF-8\x3b)?base64\x2c/si";
    reference:url,proofpoint.com/us/threat-insight/post/Obfuscation-Techniques-In-Phishing-Attacks;
    classtype:social-engineering;
    sid:2022597; rev:5;
    metadata:attack_target Client_Endpoint, created_at 2016_03_07, deployment Perimeter, confidence Medium, signature_severity Critical, tag Phishing, updated_at 2020_08_19, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1566, mitre_technique_name Phishing;
)