ET POLICY MOBILE Apple device leaking UDID from SpringBoard via GET

Query · suricata

flow:established,to_server;
http.uri;
content:"UDID";
pcre:"/[0-9a-f]{40}[^0-9a-f]/";
http.user_agent;
content:"|20|CFNetwork/"; fast_pattern;
content:"|20|Darwin/";
Raw source ET POLICY MOBILE Apple device leaking UDID from SpringBoard via GET · Suricata
Esc
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 POLICY MOBILE Apple device leaking UDID from SpringBoard via GET";
    flow:established,to_server;
    http.uri;
    content:"UDID";
    pcre:"/[0-9a-f]{40}[^0-9a-f]/";
    http.user_agent;
    content:"|20|CFNetwork/"; fast_pattern;
    content:"|20|Darwin/";
    reference:url,www.innerfence.com/howto/find-iphone-unique-device-identifier-udid;
    reference:url,support.apple.com/kb/HT4061;
    classtype:attempted-recon;
    sid:2013290; rev:5;
    metadata:created_at 2011_07_19, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_08_20;
)

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