Versions (4)
Version DetailsCurrent
Rev: 4 • Jul 30, 2010, 12:00 PMET SCAN Unusually Fast 403 Error Messages, Possible Web Application Scan
alert http $HTTP_SERVERS $HTTP_PORTS -> $EXTERNAL_NET any (msg:"ET SCAN Unusually Fast 403 Error Messages, Possible Web Application Scan"; flow:from_server,established; content:"HTTP/1.1 403"; depth:13; threshold:type threshold, track by_dst, count 35, seconds 60; reference:url,www.checkupdown.com/status/E403.html; classtype:attempted-recon; sid:2009749; rev:4; metadata:created_at 2010_07_30, confidence Medium, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)
Jul 30, 2010, 12:00 PM
Jul 26, 2019, 12:00 PM
Sep 21, 2024, 3:00 AM
Dec 9, 2025, 10:34 PM
rules/emerging-scan.rules