Versions (4)
Version DetailsCurrent
Rev: 4 • Aug 26, 2014, 12:00 PMET DOS Likely NTP DDoS In Progress Multiple UNSETTRAP Mode 6 Responses
alert udp any 123 -> any any (msg:"ET DOS Likely NTP DDoS In Progress Multiple UNSETTRAP Mode 6 Responses"; content:"|df 00 00 04 00|"; offset:1; depth:5; byte_test:1,!&,128,0; byte_test:1,!&,64,0; byte_test:1,&,4,0; byte_test:1,&,2,0; byte_test:1,!&,1,0; threshold:type both,track by_src,count 2,seconds 60; reference:url,community.rapid7.com/community/metasploit/blog/2014/08/25/r7-2014-12-more-amplification-vulnerabilities-in-ntp-allow-even-more-drdos-attacks; classtype:attempted-dos; sid:2019022; rev:4; metadata:created_at 2014_08_26, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)
Aug 26, 2014, 12:00 PM
Jul 26, 2019, 12:00 PM
Sep 21, 2024, 3:00 AM
Dec 12, 2025, 10:34 PM
rules/emerging-dos.rules