ET HUNTING Suspicious Netlify Hosted TLS SNI Request - Possible Phishing Landing

Query · suricata

flow:established,to_server;
tls.sni;
content:".netlify.app";
pcre:"/^[a-z0-9]+\-[a-z0-9]+\-[a-f0-9]{6}\.netlify\.app$/";
Raw source ET HUNTING Suspicious Netlify Hosted TLS SNI Request - 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 tls $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET HUNTING Suspicious Netlify Hosted TLS SNI Request - Possible Phishing Landing";
    flow:established,to_server;
    tls.sni;
    content:".netlify.app";
    pcre:"/^[a-z0-9]+\-[a-z0-9]+\-[a-f0-9]{6}\.netlify\.app$/";
    classtype:social-engineering;
    sid:2032760; rev:1;
    metadata:affected_product Web_Browsers, attack_target Client_Endpoint, created_at 2021_04_14, deployment Perimeter, confidence Medium, signature_severity Critical, tag Phishing, updated_at 2021_04_14, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1566, mitre_technique_name Phishing;
)

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