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SID: 2017965 • Source: et/open

Versions (3)

Version DetailsCurrent

Rev: 3Jan 14, 2014, 12:00 PM

ET DOS Likely NTP DDoS In Progress MON_LIST Response to Non-Ephemeral Port IMPL 0x02

alert udp any 123 -> any 0:1023 (msg:"ET DOS Likely NTP DDoS In Progress MON_LIST Response to Non-Ephemeral Port IMPL 0x02"; content:"|00 02 2a|"; offset:1; depth:3; 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 1,seconds 120; reference:url,www.symantec.com/connect/blogs/hackers-spend-christmas-break-launching-large-scale-ntp-reflection-attacks; reference:url,en.wikipedia.org/wiki/Ephemeral_port; classtype:attempted-dos; sid:2017965; rev:3; metadata:created_at 2014_01_14, confidence Medium, signature_severity Major, updated_at 2019_07_26;)

Jan 14, 2014, 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