ET SCAN H.323 Scanning device

Query · suricata

flow:established,to_server;
content:"|40 04 00 63 00 69 00 73 00 63 00 6f|"; fast_pattern; offset:55; depth:12;
threshold:type limit, track by_src, count 1, seconds 60;
Raw source ET SCAN H.323 Scanning device · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert tcp any any -> $HOME_NET 1720 (
    msg:"ET SCAN H.323 Scanning device";
    flow:established,to_server;
    content:"|40 04 00 63 00 69 00 73 00 63 00 6f|"; fast_pattern; offset:55; depth:12;
    threshold:type limit, track by_src, count 1, seconds 60;
    reference:url,videonationsltd.co.uk/2014/11/h-323-cisco-spam-calls/;
    classtype:network-scan;
    sid:2020853; rev:2;
    metadata:created_at 2015_04_08, confidence Medium, signature_severity Informational, updated_at 2019_07_26;
)

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