ET SCAN NMAP SIP Version Detect OPTIONS Scan

Query · suricata

flow:established,to_server;
content:"OPTIONS sip|3A|nm SIP/"; depth:19;
Raw source ET SCAN NMAP SIP Version Detect OPTIONS Scan · 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 $EXTERNAL_NET any -> $HOME_NET $HTTP_PORTS (
    msg:"ET SCAN NMAP SIP Version Detect OPTIONS Scan";
    flow:established,to_server;
    content:"OPTIONS sip|3A|nm SIP/"; depth:19;
    classtype:attempted-recon;
    sid:2018317; rev:1;
    metadata:created_at 2014_03_25, confidence Low, signature_severity Informational, updated_at 2019_07_26;
)

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