Versions (2)
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Rev: 2 • Aug 12, 2016, 12:00 PMET DOS DNS Amplification Attack Possible Outbound Windows Non-Recursive Root Hint Reserved Port
alert udp $HOME_NET 53 -> $EXTERNAL_NET 1:1023 (msg:"ET DOS DNS Amplification Attack Possible Outbound Windows Non-Recursive Root Hint Reserved Port"; content:"|81 00 00 01 00 00|"; depth:6; offset:2; byte_test:2,>,10,0,relative; byte_test:2,>,10,2,relative; content:"|0c|root-servers|03|net|00|"; distance:0; content:"|0c|root-servers|03|net|00|"; distance:0; threshold:type both, track by_dst, seconds 60, count 5; reference:url,twitter.com/sempersecurus/status/763749835421941760; reference:url,pastebin.com/LzubgtVb; classtype:bad-unknown; sid:2023054; rev:2; metadata:attack_target Server, created_at 2016_08_12, deployment Datacenter, performance_impact Low, confidence Medium, signature_severity Major, updated_at 2019_07_26;)
Aug 12, 2016, 12:00 PM
Jul 26, 2019, 12:00 PM
Sep 21, 2024, 3:00 AM
May 30, 2025, 12:04 AM
rules/emerging-dos.rules