ET INFO Observed UA-Pixels Header

Query · suricata

flow:established,to_server;
http.header_names;
content:"|0d 0a|ua-pixels|0d 0a|"; nocase;
threshold:type limit, track by_src, seconds 180, count 1;
Raw source ET INFO Observed UA-Pixels Header · Suricata
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Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET INFO Observed UA-Pixels Header";
    flow:established,to_server;
    http.header_names;
    content:"|0d 0a|ua-pixels|0d 0a|"; nocase;
    threshold:type limit, track by_src, seconds 180, count 1;
    reference:url,oreilly.com/library/view/http-the-definitive/1565925092/re52.html;
    classtype:misc-activity;
    sid:2062719; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2025_06_03, deployment Perimeter, confidence High, signature_severity Informational, updated_at 2025_06_03;
)

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