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# Emerging Threats
#
# This distribution may contain rules under two different licenses.
#
# Rules with sids 1 through 3464, and 100000000 through 100000908 are under the GPLv2.
# A copy of that license is available at http://www.gnu.org/licenses/gpl-2.0.html
#
# Rules with sids 2000000 through 2799999 are from Emerging Threats and are covered under the BSD License
# as follows:
#
#*************************************************************
# Copyright (c) 2003-2017, Emerging Threats
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without modification, are permitted provided that the
# following conditions are met:
#
# * Redistributions of source code must retain the above copyright notice, this list of conditions and the following
# disclaimer.
# * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the
# following disclaimer in the documentation and/or other materials provided with the distribution.
# * Neither the name of the nor the names of its contributors may be used to endorse or promote products derived
# from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS AS IS AND ANY EXPRESS OR IMPLIED WARRANTIES,
# INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
# USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
#*************************************************************
#
#
#
#
# This Ruleset is EmergingThreats Open optimized for suricata-1.3-enhanced.
#alert udp any 53 -> $DNS_SERVERS any (msg:"ET DNS Excessive DNS Responses with 1 or more RR's (100+ in 10 seconds) - possible Cache Poisoning Attempt"; byte_test:2,>,0,6; byte_test:2,>,0,10; threshold: type both, track by_src, count 100, seconds 10; reference:url,doc.emergingthreats.net/bin/view/Main/2008446; classtype:bad-unknown; sid:2008446; rev:9; metadata:created_at 2010_07_30, updated_at 2010_07_30;)
#alert udp any 53 -> $HOME_NET any (msg:"ET DNS Excessive NXDOMAIN responses - Possible DNS Backscatter or Domain Generation Algorithm Lookups"; byte_test:1,&,128,2; byte_test:1,&,1,3; byte_test:1,&,2,3; threshold: type both, track by_src, count 50, seconds 10; reference:url,doc.emergingthreats.net/bin/view/Main/2008470; classtype:bad-unknown; sid:2008470; rev:6; metadata:created_at 2010_07_30, updated_at 2010_07_30;)
#alert udp any 53 -> $HOME_NET any (msg:"ET DNS Query Responses with 3 RR's set (50+ in 2 seconds) - possible NS RR Cache Poisoning Attempt"; content: "|85 00 00 01 00 01 00 01|"; offset: 2; depth:8; threshold: type both, track by_src,count 50, seconds 2; reference:url,infosec20.blogspot.com/2008/07/kaminsky-dns-cache-poisoning-poc.html; reference:url,doc.emergingthreats.net/bin/view/Main/2008447; classtype:bad-unknown; sid:2008447; rev:7; metadata:created_at 2010_07_30, updated_at 2010_07_30;)
#alert udp any 53 -> $HOME_NET any (msg:"ET DNS Query Responses with 3 RR's set (50+ in 2 seconds) - possible A RR Cache Poisoning Attempt"; content: "|81 80 00 01 00 01 00 01|"; offset: 2; depth:8; threshold: type both, track by_src, count 50, seconds 2; reference:url,infosec20.blogspot.com/2008/07/kaminsky-dns-cache-poisoning-poc.html; reference:url,doc.emergingthreats.net/bin/view/Main/2008475; classtype:bad-unknown; sid:2008475; rev:4; metadata:created_at 2010_07_30, updated_at 2010_07_30;)
#alert udp $DNS_SERVERS 53 -> any any (msg:"ET DNS Standard query response, Format error"; pcre:"/^..[\x81\x82\x83\x84\x85\x86\x87]\x81/"; reference:url,doc.emergingthreats.net/2001116; classtype:not-suspicious; sid:2001116; rev:6; metadata:created_at 2010_07_30, updated_at 2010_07_30;)
#alert udp $DNS_SERVERS 53 -> any any (msg:"ET DNS Standard query response, Name Error"; pcre:"/^..[\x81\x82\x83\x84\x85\x86\x87]\x83/"; reference:url,doc.emergingthreats.net/2001117; classtype:not-suspicious; sid:2001117; rev:6; metadata:created_at 2010_07_30, updated_at 2010_07_30;)
#alert udp $DNS_SERVERS 53 -> any any (msg:"ET DNS Standard query response, Not Implemented"; pcre:"/^..[\x81\x82\x83\x84\x85\x86\x87]\x84/"; reference:url,doc.emergingthreats.net/2001118; classtype:not-suspicious; sid:2001118; rev:6; metadata:created_at 2010_07_30, updated_at 2010_07_30;)
#alert udp $DNS_SERVERS 53 -> any any (msg:"ET DNS Standard query response, Refused"; pcre:"/^..[\x81\x82\x83\x84\x85\x86\x87]\x85/"; reference:url,doc.emergingthreats.net/2001119; classtype:not-suspicious; sid:2001119; rev:6; metadata:created_at 2010_07_30, updated_at 2010_07_30;)
alert tcp $EXTERNAL_NET any -> $HOME_NET 53 (msg:"GPL DNS EXPLOIT named 8.2->8.2.1"; flow:to_server,established; content:"../../../"; reference:bugtraq,788; reference:cve,1999-0833; classtype:attempted-admin; sid:2100258; rev:7; metadata:created_at 2010_09_23, updated_at 2010_09_23;)
#alert tcp $EXTERNAL_NET any -> $HOME_NET 53 (msg:"GPL DNS named overflow ADM"; flow:to_server,established; content:"thisissometempspaceforthesockinaddrinyeahyeahiknowthisislamebutanywaywhocareshorizongotitworkingsoalliscool"; reference:bugtraq,788; reference:cve,1999-0833; classtype:attempted-admin; sid:2100259; rev:8; metadata:created_at 2010_09_23, updated_at 2010_09_23;)
alert tcp $EXTERNAL_NET any -> $HOME_NET 53 (msg:"GPL DNS named overflow attempt"; flow:to_server,established; content:"|CD 80 E8 D7 FF FF FF|/bin/sh"; reference:url,www.cert.org/advisories/CA-1998-05.html; classtype:attempted-admin; sid:2100261; rev:7; metadata:created_at 2010_09_23, updated_at 2010_09_23;)
#alert tcp $EXTERNAL_NET any -> $HOME_NET 53 (msg:"GPL DNS TCP inverse query overflow"; flow:to_server,established; byte_test:1,<,16,4; byte_test:1,&,8,4; isdataat:400; reference:bugtraq,134; reference:cve,1999-0009; classtype:attempted-admin; sid:2103153; rev:3; metadata:created_at 2010_09_23, updated_at 2010_09_23;)
alert tcp $EXTERNAL_NET any -> $HOME_NET 53 (msg:"GPL DNS named authors attempt"; flow:to_server,established; content:"|07|authors"; offset:12; nocase; content:"|04|bind|00|"; offset:12; nocase; reference:arachnids,480; reference:nessus,10728; classtype:attempted-recon; sid:2101435; rev:8; metadata:created_at 2010_09_23, updated_at 2010_09_23;)
alert tcp $EXTERNAL_NET any -> $HOME_NET 53 (msg:"GPL DNS named version attempt"; flow:to_server,established; content:"|07|version"; offset:12; nocase; content:"|04|bind|00|"; offset:12; nocase; reference:arachnids,278; reference:nessus,10028; classtype:attempted-recon; sid:2100257; rev:10; metadata:created_at 2010_09_23, updated_at 2010_09_23;)
#alert tcp $EXTERNAL_NET any -> $HOME_NET 53 (msg:"GPL DNS zone transfer TCP"; flow:to_server,established; content:"|00 00 FC|"; offset:15; reference:arachnids,212; reference:cve,1999-0532; reference:nessus,10595; classtype:attempted-recon; sid:2100255; rev:14; metadata:created_at 2010_09_23, updated_at 2010_09_23;)
#alert udp $EXTERNAL_NET 53 -> $HOME_NET any (msg:"GPL DNS SPOOF query response PTR with TTL of 1 min. and no authority"; content:"|85 80 00 01 00 01 00 00 00 00|"; content:"|C0 0C 00 0C 00 01 00 00 00|<|00 0F|"; classtype:bad-unknown; sid:2100253; rev:5; metadata:created_at 2010_09_23, updated_at 2010_09_23;)
#alert udp $EXTERNAL_NET 53 -> $HOME_NET any (msg:"GPL DNS SPOOF query response with TTL of 1 min. and no authority"; content:"|81 80 00 01 00 01 00 00 00 00|"; content:"|C0 0C 00 01 00 01 00 00 00|<|00 04|"; classtype:bad-unknown; sid:2100254; rev:5; metadata:created_at 2010_09_23, updated_at 2010_09_23;)
#alert udp $EXTERNAL_NET any -> $HOME_NET 53 (msg:"GPL DNS UDP inverse query overflow"; byte_test:1,<,16,2; byte_test:1,&,8,2; isdataat:400; reference:bugtraq,134; reference:cve,1999-0009; classtype:attempted-admin; sid:2103154; rev:3; metadata:created_at 2010_09_23, updated_at 2010_09_23;)
alert udp $EXTERNAL_NET any -> $HOME_NET 53 (msg:"GPL DNS named authors attempt"; content:"|07|authors"; offset:12; nocase; content:"|04|bind|00|"; offset:12; nocase; reference:nessus,10728; classtype:attempted-recon; sid:2100256; rev:8; metadata:created_at 2010_09_23, updated_at 2010_09_23;)
alert udp $EXTERNAL_NET any -> $HOME_NET 53 (msg:"GPL DNS named iquery attempt"; content:"|09 80 00 00 00 01 00 00 00 00|"; depth:16; offset:2; reference:bugtraq,134; reference:cve,1999-0009; reference:url,www.rfc-editor.org/rfc/rfc1035.txt; classtype:attempted-recon; sid:2100252; rev:9; metadata:created_at 2010_09_23, updated_at 2010_09_23;)
alert udp $EXTERNAL_NET any -> $HOME_NET 53 (msg:"GPL DNS named version attempt"; content:"|07|version"; offset:12; nocase; content:"|04|bind|00|"; offset:12; nocase; reference:nessus,10028; classtype:attempted-recon; sid:2101616; rev:9; metadata:created_at 2010_09_23, updated_at 2010_09_23;)
alert udp $EXTERNAL_NET any -> $HOME_NET 53 (msg:"GPL DNS zone transfer UDP"; content:"|00 00 FC|"; offset:14; reference:cve,1999-0532; reference:nessus,10595; classtype:attempted-recon; sid:2101948; rev:8; metadata:created_at 2010_09_23, updated_at 2010_09_23;)
#alert udp $HOME_NET any -> $EXTERNAL_NET 53 (msg:"ET DNS DNS Query for Suspicious .com.ru Domain"; content:"|01 00 00 01 00 00 00 00 00 00|"; depth:10; offset:2; content:"|03|com|02|ru|00|"; fast_pattern; nocase; distance:0; reference:url,sign.kaffenews.com/?p=104; classtype:bad-unknown; sid:2011407; rev:3; metadata:created_at 2010_09_27, updated_at 2010_09_27;)
#alert udp $HOME_NET any -> $EXTERNAL_NET 53 (msg:"ET DNS DNS Query for Suspicious .com.cn Domain"; content:"|01 00 00 01 00 00 00 00 00 00|"; depth:10; offset:2; content:"|03|com|02|cn|00|"; fast_pattern; nocase; distance:0; reference:url,sign.kaffenews.com/?p=104; classtype:bad-unknown; sid:2011408; rev:3; metadata:created_at 2010_09_27, updated_at 2010_09_27;)
alert udp $HOME_NET any -> $EXTERNAL_NET 53 (msg:"ET DNS DNS Query for Suspicious .co.cc Domain"; content:"|01 00 00 01 00 00 00 00 00 00|"; depth:10; offset:2; content:"|02|co|02|cc|00|"; fast_pattern; nocase; distance:0; reference:url,sign.kaffenews.com/?p=104; classtype:bad-unknown; sid:2011409; rev:3; metadata:created_at 2010_09_27, updated_at 2010_09_27;)
alert udp $HOME_NET any -> $EXTERNAL_NET 53 (msg:"ET DNS DNS Query for Suspicious .cz.cc Domain"; content:"|01 00 00 01 00 00 00 00 00 00|"; depth:10; offset:2; content:"|02|cz|02|cc|00|"; fast_pattern; nocase; distance:0; reference:url,sign.kaffenews.com/?p=104; classtype:bad-unknown; sid:2011410; rev:3; metadata:created_at 2010_09_27, updated_at 2010_09_27;)
#alert udp $HOME_NET any -> $EXTERNAL_NET 53 (msg:"ET DNS DNS Query for Suspicious .co.kr Domain"; content:"|01 00 00 01 00 00 00 00 00 00|"; depth:10; offset:2; content:"|02|co|02|kr|00|"; fast_pattern; nocase; distance:0; reference:url,sign.kaffenews.com/?p=104; classtype:bad-unknown; sid:2011411; rev:3; metadata:created_at 2010_09_27, updated_at 2010_09_27;)
alert udp ![$SMTP_SERVERS,$DNS_SERVERS] any -> $DNS_SERVERS 53 (msg:"ET DNS DNS Lookup for localhost.DOMAIN.TLD"; content:"|01 00 00 01 00 00 00 00 00 00|"; depth:10; offset:2; content:"|09|localhost"; fast_pattern; nocase; classtype:bad-unknown; sid:2011802; rev:3; metadata:created_at 2010_10_12, updated_at 2010_10_12;)
alert udp $HOME_NET any -> any 53 (msg:"ET DNS Hiloti DNS CnC Channel Successful Install Message"; content:"|01 00 00 01 00 00 00 00 00 00|"; depth:10; offset:2; content:"|05|empty"; nocase; distance:0; content:"|0C|explorer_exe"; nocase; distance:0; reference:url,sign.kaffenews.com/?p=104; reference:url,blog.fortinet.com/hiloti-the-botmaster-of-disguise/; classtype:bad-unknown; sid:2011911; rev:2; metadata:created_at 2010_11_09, updated_at 2010_11_09;)
alert udp $HOME_NET any -> any 53 (msg:"ET DNS DNS Query for a Suspicious Malware Related Numerical .in Domain"; content:"|01 00 00 01 00 00 00 00 00 00|"; depth:10; offset:2; content:"|02|in|00|"; fast_pattern; nocase; distance:0; pcre:"/\x00[0-9]{4,7}\x02in\x00/i"; reference:url,sign.kaffenews.com/?p=104; reference:url,www.isc.sans.org/diary.html?storyid=10165; classtype:bad-unknown; sid:2012115; rev:6; metadata:created_at 2011_12_30, updated_at 2011_12_30;)
alert udp $HOME_NET any -> $EXTERNAL_NET 53 (msg:"ET DNS Query to a .tk domain - Likely Hostile"; content:"|01 00 00 01 00 00 00 00 00 00|"; depth:10; offset:2; content:"|02|tk|00|"; fast_pattern; nocase; distance:0; classtype:bad-unknown; sid:2012811; rev:2; metadata:created_at 2011_05_15, updated_at 2011_05_15;)
alert udp $HOME_NET any -> $EXTERNAL_NET 53 (msg:"ET DNS DNS Query to a Suspicious *.vv.cc domain"; content:"|01 00 00 01 00 00 00 00 00 00|"; depth:10; offset:2; content:"|02|vv|02|cc|00|"; fast_pattern; nocase; distance:0; classtype:bad-unknown; sid:2012826; rev:1; metadata:created_at 2011_05_19, updated_at 2011_05_19;)
alert udp $HOME_NET any -> $EXTERNAL_NET 53 (msg:"ET DNS DNS Query for a Suspicious *.ae.am domain"; content:"|01 00 00 01 00 00 00 00 00 00|"; depth:10; offset:2; content:"|02|ae|02|am"; fast_pattern; classtype:bad-unknown; sid:2012900; rev:3; metadata:created_at 2011_05_31, updated_at 2011_05_31;)
alert udp $HOME_NET any -> $EXTERNAL_NET 53 (msg:"ET DNS Query for a Suspicious *.noc.su domain"; content:"|01 00 00 01 00 00 00 00 00 00|"; depth:10; offset:2; content:"|03|noc|02|su"; fast_pattern:only; classtype:bad-unknown; sid:2012901; rev:2; metadata:created_at 2011_05_31, updated_at 2011_05_31;)
alert udp $HOME_NET any -> $EXTERNAL_NET 53 (msg:"ET DNS DNS Query for a Suspicious *.be.ma domain"; content:"|01 00 00 01 00 00 00 00 00 00|"; depth:10; offset:2; content:"|02|be|02|ma"; fast_pattern; distance:0; classtype:bad-unknown; sid:2012902; rev:3; metadata:created_at 2011_05_31, updated_at 2011_05_31;)
alert udp $HOME_NET any -> $EXTERNAL_NET 53 (msg:"ET DNS DNS Query for a Suspicious *.qc.cx domain"; content:"|01 00 00 01 00 00 00 00 00 00|"; depth:10; offset:2; content:"|02|qc|02|cx"; fast_pattern; classtype:bad-unknown; sid:2012903; rev:3; metadata:created_at 2011_05_31, updated_at 2011_05_31;)
alert udp $HOME_NET any -> $EXTERNAL_NET 53 (msg:"ET DNS DNS Query for a Suspicious *.co.tv domain"; content:"|01 00 00 01 00 00 00 00 00 00|"; depth:10; offset:2; content:"|02|co|02|tv"; fast_pattern; classtype:bad-unknown; sid:2012956; rev:3; metadata:created_at 2011_06_08, updated_at 2011_06_08;)
alert udp $HOME_NET any -> $EXTERNAL_NET 53 (msg:"ET DNS DNS Query for Illegal Drug Sales Site (SilkRoad)"; content:"|01 00 00 01 00 00 00 00 00 00|"; depth:10; offset:2; content:"|10|ianxz6zefk72ulzz|05|onion"; classtype:policy-violation; sid:2013016; rev:2; metadata:created_at 2011_06_13, updated_at 2011_06_13;)
alert udp $HOME_NET any -> $EXTERNAL_NET 53 (msg:"ET DNS DNS Query for Suspicious .co.be Domain"; content:"|01 00 00 01 00 00 00 00 00 00|"; depth:10; offset:2; content:"|02|co|02|be"; fast_pattern; nocase; distance:0; classtype:bad-unknown; sid:2013124; rev:3; metadata:created_at 2011_06_28, updated_at 2011_06_28;)
alert udp $HOME_NET any -> $EXTERNAL_NET 53 (msg:"ET DNS DNS Query for a Suspicious *.cu.cc domain"; content:"|01 00 00 01 00 00 00 00 00 00|"; depth:10; offset:2; content:"|02|cu|02|cc"; fast_pattern; classtype:bad-unknown; sid:2013172; rev:2; metadata:created_at 2011_07_02, updated_at 2011_07_02;)
alert udp $HOME_NET any -> $EXTERNAL_NET 53 (msg:"ET DNS Query for Suspicious .net.tf Domain"; content:"|01 00 00 01 00 00 00 00 00 00|"; depth:10; offset:2; content:"|03|net|02|tf"; fast_pattern; nocase; distance:0; classtype:bad-unknown; sid:2013847; rev:1; metadata:created_at 2011_11_07, updated_at 2011_11_07;)
alert udp $HOME_NET any -> $EXTERNAL_NET 53 (msg:"ET DNS Query for Suspicious .eu.tf Domain"; content:"|01 00 00 01 00 00 00 00 00 00|"; depth:10; offset:2; content:"|02|eu|02|tf"; fast_pattern; nocase; distance:0; classtype:bad-unknown; sid:2013848; rev:1; metadata:created_at 2011_11_07, updated_at 2011_11_07;)
alert udp $HOME_NET any -> $EXTERNAL_NET 53 (msg:"ET DNS Query for Suspicious .int.tf Domain"; content:"|01 00 00 01 00 00 00 00 00 00|"; depth:10; offset:2; content:"|03|int|02|tf"; fast_pattern; nocase; distance:0; classtype:bad-unknown; sid:2013849; rev:1; metadata:created_at 2011_11_07, updated_at 2011_11_07;)
alert udp $HOME_NET any -> $EXTERNAL_NET 53 (msg:"ET DNS Query for Suspicious .edu.tf Domain"; content:"|01 00 00 01 00 00 00 00 00 00|"; depth:10; offset:2; content:"|03|edu|02|tf"; fast_pattern; nocase; distance:0; classtype:bad-unknown; sid:2013850; rev:1; metadata:created_at 2011_11_07, updated_at 2011_11_07;)
alert udp $HOME_NET any -> $EXTERNAL_NET 53 (msg:"ET DNS Query for Suspicious .us.tf Domain"; content:"|01 00 00 01 00 00 00 00 00 00|"; depth:10; offset:2; content:"|02|us|02|tf"; fast_pattern; nocase; distance:0; classtype:bad-unknown; sid:2013851; rev:1; metadata:created_at 2011_11_07, updated_at 2011_11_07;)
alert udp $HOME_NET any -> $EXTERNAL_NET 53 (msg:"ET DNS Query for Suspicious .ca.tf Domain"; content:"|01 00 00 01 00 00 00 00 00 00|"; depth:10; offset:2; content:"|02|ca|02|tf"; fast_pattern; nocase; distance:0; classtype:bad-unknown; sid:2013852; rev:1; metadata:created_at 2011_11_07, updated_at 2011_11_07;)
alert udp $HOME_NET any -> $EXTERNAL_NET 53 (msg:"ET DNS Query for Suspicious .bg.tf Domain"; content:"|01 00 00 01 00 00 00 00 00 00|"; depth:10; offset:2; content:"|02|bg|02|tf"; fast_pattern; nocase; distance:0; classtype:bad-unknown; sid:2013853; rev:1; metadata:created_at 2011_11_07, updated_at 2011_11_07;)
alert udp $HOME_NET any -> $EXTERNAL_NET 53 (msg:"ET DNS Query for Suspicious .ru.tf Domain"; content:"|01 00 00 01 00 00 00 00 00 00|"; depth:10; offset:2; content:"|02|ru|02|tf"; fast_pattern; nocase; distance:0; classtype:bad-unknown; sid:2013854; rev:1; metadata:created_at 2011_11_07, updated_at 2011_11_07;)
alert udp $HOME_NET any -> $EXTERNAL_NET 53 (msg:"ET DNS Query for Suspicious .pl.tf Domain"; content:"|01 00 00 01 00 00 00 00 00 00|"; depth:10; offset:2; content:"|02|pl|02|tf"; fast_pattern; nocase; distance:0; classtype:bad-unknown; sid:2013855; rev:1; metadata:created_at 2011_11_07, updated_at 2011_11_07;)
alert udp $HOME_NET any -> $EXTERNAL_NET 53 (msg:"ET DNS Query for Suspicious .cz.tf Domain"; content:"|01 00 00 01 00 00 00 00 00 00|"; depth:10; offset:2; content:"|02|cz|02|tf"; fast_pattern; nocase; distance:0; classtype:bad-unknown; sid:2013856; rev:1; metadata:created_at 2011_11_07, updated_at 2011_11_07;)
alert udp $HOME_NET any -> $EXTERNAL_NET 53 (msg:"ET DNS Query for Suspicious .de.tf Domain"; content:"|01 00 00 01 00 00 00 00 00 00|"; depth:10; offset:2; content:"|02|de|02|tf"; fast_pattern; nocase; distance:0; classtype:bad-unknown; sid:2013857; rev:1; metadata:created_at 2011_11_07, updated_at 2011_11_07;)
alert udp $HOME_NET any -> $EXTERNAL_NET 53 (msg:"ET DNS Query for Suspicious .at.tf Domain"; content:"|01 00 00 01 00 00 00 00 00 00|"; depth:10; offset:2; content:"|02|at|02|tf"; fast_pattern; nocase; distance:0; classtype:bad-unknown; sid:2013858; rev:1; metadata:created_at 2011_11_07, updated_at 2011_11_07;)
alert udp $HOME_NET any -> $EXTERNAL_NET 53 (msg:"ET DNS Query for Suspicious .ch.tf Domain"; content:"|01 00 00 01 00 00 00 00 00 00|"; depth:10; offset:2; content:"|02|ch|02|tf"; fast_pattern; nocase; distance:0; classtype:bad-unknown; sid:2013859; rev:1; metadata:created_at 2011_11_07, updated_at 2011_11_07;)
alert udp $HOME_NET any -> $EXTERNAL_NET 53 (msg:"ET DNS Query for Suspicious .sg.tf Domain"; content:"|01 00 00 01 00 00 00 00 00 00|"; depth:10; offset:2; content:"|02|sg|02|tf"; fast_pattern; nocase; distance:0; classtype:bad-unknown; sid:2013860; rev:1; metadata:created_at 2011_11_07, updated_at 2011_11_07;)
alert udp $HOME_NET any -> $EXTERNAL_NET 53 (msg:"ET DNS Query for Suspicious .nl.ai Domain"; content:"|01 00 00 01 00 00 00 00 00 00|"; depth:10; offset:2; content:"|02|nl|02|ai"; fast_pattern; nocase; distance:0; classtype:bad-unknown; sid:2013861; rev:1; metadata:created_at 2011_11_07, updated_at 2011_11_07;)
alert udp $HOME_NET any -> $EXTERNAL_NET 53 (msg:"ET DNS Query for Suspicious .xe.cx Domain"; content:"|01 00 00 01 00 00 00 00 00 00|"; depth:10; offset:2; content:"|02|xe|02|cx"; fast_pattern; nocase; distance:0; classtype:bad-unknown; sid:2013862; rev:1; metadata:created_at 2011_11_07, updated_at 2011_11_07;)
alert udp any 53 -> $DNS_SERVERS any (msg:"ET DNS Excessive DNS Responses with 1 or more RR's (100+ in 10 seconds) to google.com.br possible Cache Poisoning Attempt"; byte_test:2,>,0,6; byte_test:2,>,0,10; threshold: type both, track by_src, count 100, seconds 10; content:"|06|google|03|com|02|br|00|"; reference:url,www.securelist.com/en/blog/208193214/Massive_DNS_poisoning_attacks_in_Brazil; reference:url,www.zdnet.com/blog/security/massive-dns-poisoning-attack-in-brazil-serving-exploits-and-malware/9780; classtype:bad-unknown; sid:2013894; rev:5; metadata:created_at 2011_11_10, updated_at 2011_11_10;)
alert udp $HOME_NET any -> $EXTERNAL_NET 53 (msg:"ET DNS Query for Suspicious .noip.cn Domain"; content:"|01 00 00 01 00 00 00 00 00 00|"; depth:10; offset:2; content:"|03|noip|02|cn|00|"; fast_pattern; nocase; distance:0; classtype:bad-unknown; sid:2013970; rev:1; metadata:created_at 2011_11_28, updated_at 2011_11_28;)
alert udp $HOME_NET any -> $EXTERNAL_NET 53 (msg:"ET DNS Query for .su TLD (Soviet Union) Often Malware Related"; content:"|01 00 00 01 00 00 00 00 00 00|"; depth:10; offset:2; content:"|02|su|00|"; fast_pattern; distance:0; nocase; reference:url,www.abuse.ch/?p=3581; classtype:bad-unknown; sid:2014169; rev:1; metadata:created_at 2012_01_31, updated_at 2012_01_31;)
alert udp $HOME_NET any -> any 53 (msg:"ET DNS DNS Query for Suspicious .ch.vu Domain"; content:"|01 00 00 01 00 00 00 00 00 00|"; depth:10; offset:2; content:"|02|ch|02|vu"; fast_pattern; nocase; distance:0; reference:url,google.com/safebrowsing/diagnostic?site=ch.vu; classtype:bad-unknown; sid:2014285; rev:4; metadata:created_at 2012_02_27, updated_at 2012_02_27;)
alert udp $HOME_NET !9987 -> $EXTERNAL_NET 53 (msg:"ET DNS Non-DNS or Non-Compliant DNS traffic on DNS port Opcode 6 or 7 set"; content:!"7PYqwfzt"; depth:8; byte_test:1,!&,64,2; byte_test:1,&,32,2; byte_test:1,&,16,2; threshold: type limit, count 1, seconds 120, track by_dst; reference:md5,a56ec0f9bd46f921f65e4f6e598e5ed0; reference:url,vrt-blog.snort.org/2008/08/checking-multiple-bits-in-flag-field_29.html; classtype:policy-violation; sid:2014701; rev:12; metadata:created_at 2012_05_03, updated_at 2016_07_12;)
alert udp $HOME_NET any -> $EXTERNAL_NET 53 (msg:"ET DNS Non-DNS or Non-Compliant DNS traffic on DNS port Opcode 8 through 15 set"; content:!"7PYqwfzt"; depth:8; byte_test:1,&,64,2; threshold: type limit, count 1, seconds 120, track by_dst; reference:md5,a56ec0f9bd46f921f65e4f6e598e5ed0; reference:url,vrt-blog.snort.org/2008/08/checking-multiple-bits-in-flag-field_29.html; classtype:policy-violation; sid:2014702; rev:9; metadata:created_at 2012_05_03, updated_at 2016_07_12;)
alert udp $HOME_NET any -> $EXTERNAL_NET 53 (msg:"ET DNS Non-DNS or Non-Compliant DNS traffic on DNS port Reserved Bit Set"; content:!"7PYqwfzt"; depth:8; byte_test:1,&,64,3; threshold: type limit, count 1, seconds 120, track by_dst; reference:md5,a56ec0f9bd46f921f65e4f6e598e5ed0; reference:url,vrt-blog.snort.org/2008/08/checking-multiple-bits-in-flag-field_29.html; classtype:policy-violation; sid:2014703; rev:9; metadata:created_at 2012_05_03, updated_at 2016_07_12;)
alert udp $HOME_NET any -> any 53 (msg:"ET DNS Query for a Suspicious *.upas.su domain"; content:"|01 00 00 01 00 00 00 00 00 00|"; depth:10; offset:2; content:"|04|upas|02|su|00|"; fast_pattern; nocase; distance:0; classtype:bad-unknown; sid:2015550; rev:1; metadata:created_at 2012_07_31, updated_at 2012_07_31;)
alert udp $EXTERNAL_NET 53 -> $HOME_NET any (msg:"ET DNS Reply Sinkhole - sinkhole.cert.pl 148.81.111.111"; content:"|00 01 00 01|"; content:"|00 04 94 51 6f 6f|"; distance:4; within:6; classtype:trojan-activity; sid:2016413; rev:4; metadata:created_at 2013_02_14, updated_at 2013_02_14;)
alert udp $EXTERNAL_NET 53 -> $HOME_NET any (msg:"ET DNS Reply Sinkhole - Dr. Web"; content:"|00 01 00 01|"; content:"|00 04 5b e9 f4 6a|"; distance:4; within:6; reference:url,virustracker.info; classtype:trojan-activity; sid:2016418; rev:5; metadata:created_at 2013_02_16, updated_at 2013_02_16;)
alert udp $EXTERNAL_NET 53 -> $HOME_NET any (msg:"ET DNS Reply Sinkhole - Zinkhole.org"; content:"|00 01 00 01|"; content:"|00 04 b0 1f 3e 4c|"; distance:4; within:6; classtype:trojan-activity; sid:2016419; rev:5; metadata:created_at 2013_02_16, updated_at 2013_02_16;)
alert udp $EXTERNAL_NET 53 -> $HOME_NET any (msg:"ET DNS Reply Sinkhole - German Company"; content:"|00 01 00 01|"; content:"|00 04 52 a5 19 a7|"; distance:4; within:6; reference:url,virustracker.info; classtype:trojan-activity; sid:2016420; rev:5; metadata:created_at 2013_02_16, updated_at 2013_02_16;)
alert udp $EXTERNAL_NET 53 -> $HOME_NET any (msg:"ET DNS Reply Sinkhole - 1and1 Internet AG"; content:"|00 01 00 01|"; content:"|00 04 52 a5 19 d2|"; distance:4; within:6; reference:url,virustracker.info; classtype:trojan-activity; sid:2016421; rev:5; metadata:created_at 2013_02_16, updated_at 2013_02_16;)
alert udp $EXTERNAL_NET 53 -> $HOME_NET any (msg:"ET DNS Reply Sinkhole - Georgia Tech (1)"; content:"|00 01 00 01|"; content:"|00 04 c6 3d e3 06|"; distance:4; within:6; reference:url,virustracker.info; classtype:trojan-activity; sid:2016422; rev:5; metadata:created_at 2013_02_16, updated_at 2013_02_16;)
alert udp $EXTERNAL_NET 53 -> $HOME_NET any (msg:"ET DNS Reply Sinkhole - Georgia Tech (2)"; content:"|00 01 00 01|"; content:"|00 04 32 3e 0c 67|"; distance:4; within:6; reference:url,virustracker.info; classtype:trojan-activity; sid:2016423; rev:6; metadata:created_at 2013_02_16, updated_at 2013_02_16;)
alert udp $HOME_NET any -> any 53 (msg:"ET DNS APT_NGO_wuaclt C2 Domain micorsofts.net"; content:"|0a|micorsofts|03|net|00|"; nocase; fast_pattern:only; threshold: type limit, track by_src, count 1, seconds 300; reference:url,labs.alienvault.com; classtype:bad-unknown; sid:2016569; rev:3; metadata:created_at 2013_03_13, updated_at 2013_03_13;)
alert udp $HOME_NET any -> any 53 (msg:"ET DNS APT_NGO_wuaclt C2 Domain micorsofts.com"; content:"|0a|micorsofts|03|com|00|"; nocase; fast_pattern:only; threshold: type limit, track by_src, count 1, seconds 300; reference:url,labs.alienvault.com; classtype:bad-unknown; sid:2016570; rev:2; metadata:created_at 2013_03_13, updated_at 2013_03_13;)
alert udp $HOME_NET any -> any 53 (msg:"ET DNS APT_NGO_wuaclt C2 Domain hotmal1.com"; content:"|07|hotmal1|03|com|00|"; nocase; fast_pattern:only; threshold: type limit, track by_src, count 1, seconds 300; reference:url,labs.alienvault.com; classtype:bad-unknown; sid:2016571; rev:1; metadata:created_at 2013_03_13, updated_at 2013_03_13;)
alert udp any 53 -> $HOME_NET any (msg:"ET DNS Reply Sinkhole - 106.187.96.49 blacklistthisdomain.com"; content:"|00 01 00 01|"; content:"|00 04 6a bb 60 31|"; distance:4; within:6; classtype:trojan-activity; sid:2016591; rev:6; metadata:created_at 2013_03_18, updated_at 2013_03_18;)
alert udp $HOME_NET any -> $EXTERNAL_NET 53 (msg:"ET DNS Query to a *.pw domain - Likely Hostile"; content:"|01 00 00 01 00 00 00 00 00 00|"; depth:10; offset:2; content:"|02|pw|00|"; fast_pattern; nocase; distance:0; content:!"|01|u|02|pw|00|"; nocase; classtype:bad-unknown; sid:2016778; rev:4; metadata:created_at 2013_04_19, updated_at 2013_04_19;)
alert udp $HOME_NET any -> $EXTERNAL_NET any (msg:"ET DNS DNS Query for vpnoverdns - indicates DNS tunnelling"; content:"|01 00 00 01 00 00 00 00 00 00|"; depth:10; offset:2; content:"|03|tun|10|vpnoverdns|03|com|00|"; fast_pattern; nocase; distance:0; reference:url,osint.bambenekconsulting.com/manual/vpnoverdns.txt; classtype:bad-unknown; sid:2018438; rev:2; metadata:created_at 2014_05_01, updated_at 2014_05_01;)
alert udp any 53 -> $HOME_NET any (msg:"ET DNS Reply Sinkhole FBI Zeus P2P 1 - 142.0.36.234"; content:"|00 01 00 01|"; content:"|00 04 8e 00 24 ea|"; distance:4; within:6; classtype:trojan-activity; sid:2018517; rev:1; metadata:created_at 2014_06_03, updated_at 2014_06_03;)
alert udp $HOME_NET any -> any 53 (msg:"ET DNS Query to a *.top domain - Likely Hostile"; content:"|01 00 00 01 00 00 00 00 00 00|"; depth:10; offset:2; content:"|03|top|00|"; fast_pattern; nocase; distance:0; threshold:type limit, track by_src, count 1, seconds 30; reference:url,www.symantec.com/connect/blogs/shady-tld-research-gdn-and-our-2016-wrap; reference:url,www.spamhaus.org/statistics/tlds/; classtype:bad-unknown; sid:2023883; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, deployment Perimeter, signature_severity Major, created_at 2017_02_07, updated_at 2017_02_07;)
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