ET SCAN Unusually Fast 404 Error Messages (Page Not Found), Possible Web Application Scan/Directory Guessing Attack

7.0.35.0SID: 2009885Rev: 5Disabled5 views
Sourceet/open
Fileemerging-scan.rules
CreatedJuly 30, 2010
UpdatedApril 10, 2024
Classificationattempted-recon
alert http $HTTP_SERVERS $HTTP_PORTS -> $EXTERNAL_NET any (msg:"ET SCAN Unusually Fast 404 Error Messages (Page Not Found), Possible Web Application Scan/Directory Guessing Attack"; flow:established,to_client; http.stat_code; content:"404"; threshold:type threshold, track by_dst, count 30, seconds 60; reference:url,www.w3.org/Protocols/rfc2616/rfc2616-sec10.html; reference:url,en.wikipedia.org/wiki/HTTP_404; classtype:attempted-recon; sid:2009885; rev:5; metadata:created_at 2010_07_30, confidence Medium, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_10;)

References

urlwww.w3.org/Protocols/rfc2616/rfc2616-sec10.html
urlen.wikipedia.org/wiki/HTTP_404

Metadata

created at2010_07_30
confidenceMedium
signature severityInformational
tagDescription_Generated_By_Proofpoint_Nexus
updated at2024_04_10

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