ET VOIP Possible Inbound VOIP Scan/Misuse With User-Agent Zoiper

Query · suricata

content:"|0d 0a|User-Agent|3A| Zoiper"; nocase;
threshold:type limit, count 1, seconds 60, track by_src;
Raw source ET VOIP Possible Inbound VOIP Scan/Misuse With User-Agent Zoiper · 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 udp $EXTERNAL_NET any -> $HOME_NET 5060 (
    msg:"ET VOIP Possible Inbound VOIP Scan/Misuse With User-Agent Zoiper";
    content:"|0d 0a|User-Agent|3A| Zoiper"; nocase;
    threshold:type limit, count 1, seconds 60, track by_src;
    reference:url,blog.sipvicious.org/2010/12/11-million-euro-loss-in-voip-fraud-and.html;
    classtype:attempted-recon;
    sid:2012297; rev:2;
    metadata:created_at 2011_02_07, confidence Medium, signature_severity Informational, updated_at 2019_07_26;
)

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