ET CHAT Facebook Chat using XMPP

Query · suricata

flow:to_server,established;
content:"chat.facebook.com"; nocase;
content:"jabber|3A|client"; nocase; distance:9; within:13;
threshold:type limit, track by_src, count 1, seconds 60;
Raw source ET CHAT Facebook Chat using XMPP · 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 tcp $HOME_NET any -> $EXTERNAL_NET 5222 (
    msg:"ET CHAT Facebook Chat using XMPP";
    flow:to_server,established;
    content:"chat.facebook.com"; nocase;
    content:"jabber|3A|client"; nocase; distance:9; within:13;
    threshold:type limit, track by_src, count 1, seconds 60;
    reference:url,www.facebook.com/sitetour/chat.php;
    classtype:policy-violation;
    sid:2010819; rev:4;
    metadata:created_at 2010_07_30, signature_severity Informational, updated_at 2019_07_26;
)

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