ET PHISHING Base64 Data URI Javascript Refresh - Possible Phishing Landing

Query · suricata

flow:from_server,established;
file_data;
content:"<script"; nocase;
content:"window.location="; distance:0;
content:"data|3a|text/html|3b|base64,"; distance:1; within:22; fast_pattern;
Raw source ET PHISHING Base64 Data URI Javascript Refresh - Possible Phishing Landing · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET PHISHING Base64 Data URI Javascript Refresh - Possible Phishing Landing";
    flow:from_server,established;
    file_data;
    content:"<script"; nocase;
    content:"window.location="; distance:0;
    content:"data|3a|text/html|3b|base64,"; distance:1; within:22; fast_pattern;
    classtype:social-engineering;
    sid:2031955; rev:3;
    metadata:attack_target Client_Endpoint, created_at 2016_07_15, deployment Perimeter, confidence Medium, signature_severity Critical, tag Phishing, updated_at 2019_07_26, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1566, mitre_technique_name Phishing;
)

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