ET HUNTING Suspicious HTTP Refresh to SMS Aug 16 2016

Query · suricata

flow:established,from_server;
http.stat_code;
content:"200";
http.content_type;
content:"text/html"; startswith;
file.data;
content:"<meta http-equiv="; nocase;
content:"refresh"; distance:1; within:8;
pcre:"/^[^>]+url=sms\x3a/Rsi";
content:"url=sms|3a|"; nocase; fast_pattern;
Raw source ET HUNTING Suspicious HTTP Refresh to SMS Aug 16 2016 · 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 HUNTING Suspicious HTTP Refresh to SMS Aug 16 2016";
    flow:established,from_server;
    http.stat_code;
    content:"200";
    http.content_type;
    content:"text/html"; startswith;
    file.data;
    content:"<meta http-equiv="; nocase;
    content:"refresh"; distance:1; within:8;
    pcre:"/^[^>]+url=sms\x3a/Rsi";
    content:"url=sms|3a|"; nocase; fast_pattern;
    classtype:social-engineering;
    sid:2023068; rev:4;
    metadata:attack_target Client_Endpoint, created_at 2016_08_16, deployment Perimeter, performance_impact Low, confidence Medium, signature_severity Major, tag Phishing, updated_at 2020_10_06;
)

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