Report of spike in DNS Queries gd21.net

Published: 2012-07-24
Last Updated: 2012-07-24 19:34:51 UTC
by Richard Porter (Version: 2)
16 comment(s)

A reader reported (thanks @Scott) that he is observing a sudden jump in DNS Traffic all asking for the same thing.

Here is a snip from logs, slightly edited.

 

Jul 24 13:28:56 ns1 named[3240]: client XX.194.158.62#55148: query: gd21.net IN TXT +E

Jul 24 13:28:56 ns1 named[3240]: client XX.194.158.62#63757: query: gd21.net IN TXT +E

Jul 24 13:28:56 ns1 named[3240]: client XX.194.158.62#50037: query: gd21.net IN TXT +E

Jul 24 13:28:57 ns1 named[3240]: client XX.194.158.62#57822: query: gd21.net IN TXT +E

Jul 24 13:28:57 ns1 named[3240]: client XX.194.158.62#21294: query: gd21.net IN TXT +E

Jul 24 13:28:57 ns1 named[3240]: client XX.194.158.62#6076: query: gd21.net IN TXT +E

Jul 24 13:28:58 ns1 named[3240]: client XX.194.158.62#27221: query: gd21.net IN TXT +E

Jul 24 13:28:58 ns1 named[3240]: client XX.194.158.62#34485: query: gd21.net IN TXT +E

Jul 24 13:28:58 ns1 named[3240]: client XX.194.158.62#56117: query: gd21.net IN TXT +E

** used with permission **

gd21.net seems to link to a Korean Shopping site of some kind. As always, use caution when following links


Is anyone else seeing this? If so could you report it?

 

UPDATE:

Starting to look like reflective amplified DOS. If you are seeing this let us know.

 

leslie-2:~ packetalien$ dig gd21.net txt

;; Truncated, retrying in TCP mode.

 

; <<>> DiG 9.7.3-P3 <<>> gd21.net txt

;; global options: +cmd

;; Got answer:

;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 18617

;; flags: qr rd ra; QUERY: 1, ANSWER: 13, AUTHORITY: 2, ADDITIONAL: 0

 

;; QUESTION SECTION:

;gd21.net.                      IN      TXT

 

;; ANSWER SECTION:

gd21.net.               236     IN      TXT     "v=spf1 ip4:211.236.180.119 ip4:211.236.180.120 ip4:211.236.180.121 ip4:211.236.180.122 ip4:211.236.180.123 ip4:211.236.180.124 ip4:211.236.180.125 ip4:211.236.180.126 ip4:211.236.180.127 ip4:211.236.180.128 ~all"

gd21.net.               236     IN      TXT     "v=spf1 ip4:211.236.180.118 ip4:211.236.180.40 ~all"

gd21.net.               236     IN      TXT     "v=spf1 ip4:211.236.180.9 ip4:211.236.180.10 ip4:211.236.180.11 ip4:211.236.180.12 ip4:211.236.180.13 ip4:211.236.180.14 ip4:211.236.180.15 ip4:211.236.180.16 ip4:211.236.180.17 ip4:211.236.180.18 ~all"

gd21.net.               236     IN      TXT     "v=spf1 ip4:211.236.180.19 ip4:211.236.180.20 ip4:211.236.180.21 ip4:211.236.180.22 ip4:211.236.180.23 ip4:211.236.180.24 ip4:211.236.180.25 ip4:211.236.180.26 ip4:211.236.180.27 ip4:211.236.180.28 ~all"

gd21.net.               236     IN      TXT     "v=spf1 ip4:211.236.180.29 ip4:211.236.180.30 ip4:211.236.180.31 ip4:211.236.180.32 ip4:211.236.180.33 ip4:211.236.180.34 ip4:211.236.180.35 ip4:211.236.180.36 ip4:211.236.180.37 ip4:211.236.180.38 ~all"

gd21.net.               236     IN      TXT     "v=spf1 ip4:211.236.180.39 ip4:211.236.180.40 ip4:211.236.180.41 ip4:211.236.180.42 ip4:211.236.180.43 ip4:211.236.180.44 ip4:211.236.180.45 ip4:211.236.180.46 ip4:211.236.180.47 ip4:211.236.180.48 ~all"

gd21.net.               236     IN      TXT     "v=spf1 ip4:211.236.180.49 ip4:211.236.180.50 ip4:211.236.180.51 ip4:211.236.180.52 ip4:211.236.180.53 ip4:211.236.180.54 ip4:211.236.180.55 ip4:211.236.180.56 ip4:211.236.180.57 ip4:211.236.180.58 ~all"

gd21.net.               236     IN      TXT     "v=spf1 ip4:211.236.180.59 ip4:211.236.180.60 ip4:211.236.180.61 ip4:211.236.180.62 ip4:211.236.180.63 ip4:211.236.180.64 ip4:211.236.180.65 ip4:211.236.180.66 ip4:211.236.180.67 ip4:211.236.180.68 ~all"

gd21.net.               236     IN      TXT     "v=spf1 ip4:211.236.180.69 ip4:211.236.180.70 ip4:211.236.180.71 ip4:211.236.180.72 ip4:211.236.180.73 ip4:211.236.180.74 ip4:211.236.180.75 ip4:211.236.180.76 ip4:211.236.180.77 ip4:211.236.180.78 ~all"

gd21.net.               236     IN      TXT     "v=spf1 ip4:211.236.180.79 ip4:211.236.180.80 ip4:211.236.180.81 ip4:211.236.180.82 ip4:211.236.180.83 ip4:211.236.180.84 ip4:211.236.180.85 ip4:211.236.180.86 ip4:211.236.180.87 ip4:211.236.180.88 ~all"

gd21.net.               236     IN      TXT     "v=spf1 ip4:211.236.180.89 ip4:211.236.180.90 ip4:211.236.180.91 ip4:211.236.180.92 ip4:211.236.180.93 ip4:211.236.180.94 ip4:211.236.180.95 ip4:211.236.180.96 ip4:211.236.180.97 ip4:211.236.180.98 ~all"

gd21.net.               236     IN      TXT     "v=spf1 ip4:211.236.180.99 ip4:211.236.180.100 ip4:211.236.180.101 ip4:211.236.180.102 ip4:211.236.180.103 ip4:211.236.180.104 ip4:211.236.180.105 ip4:211.236.180.106 ip4:211.236.180.107 ip4:211.236.180.108 ~all"

gd21.net.               236     IN      TXT     "v=spf1 ip4:211.236.180.109 ip4:211.236.180.110 ip4:211.236.180.111 ip4:211.236.180.112 ip4:211.236.180.113 ip4:211.236.180.114 ip4:211.236.180.115 ip4:211.236.180.116 ip4:211.236.180.117 ip4:211.236.180.118 ~all"

 

;; AUTHORITY SECTION:

gd21.net.               236     IN      NS      ns2.goldennet.co.kr.

gd21.net.               236     IN      NS      ns.goldennet.co.kr.

 

;; Query time: 83 msec

;; SERVER: 68.105.29.16#53(68.105.29.16)

;; WHEN: Tue Jul 24 12:31:55 2012

;; MSG SIZE  rcvd: 2735

 

leslie-2:~ packetalien$ dig gd21.net txt | wc

      35     283    3349

 

 

 

Richard Porter

--- ISC Handler on Duty

Keywords: dns hacking internet isc phishing sans security threat virus vulnerability worm
16 comment(s)
ISC StormCast for Tuesday, July 24th 2012 http://isc.sans.edu/podcastdetail.html?id=2683
Wireshark 1.8.1 Released http://www.wireshark.org/

Comments

cwqwqwq

www

Nov 17th 2022
6 months ago

eweew<a href="https://www.seocheckin.com/edu-sites-list/">mashood</a>

EEW

Nov 17th 2022
6 months ago

WQwqwqwq[url=https://www.seocheckin.com/edu-sites-list/]mashood[/url]

qwq

Nov 17th 2022
6 months ago

dwqqqwqwq mashood

mashood

Nov 17th 2022
6 months ago

[https://isc.sans.edu/diary.html](https://isc.sans.edu/diary.html)

isc.sans.edu

Nov 23rd 2022
6 months ago

[https://isc.sans.edu/diary.html | https://isc.sans.edu/diary.html]

isc.sans.edu

Nov 23rd 2022
6 months ago

What's this all about ..?

isc.sans.edu

Dec 3rd 2022
6 months ago

password reveal .

isc.sans.edu

Dec 3rd 2022
6 months ago

<a hreaf="https://technolytical.com/">the social network</a> is described as follows because they respect your privacy and keep your data secure:

<a hreaf="https://technolytical.com/">the social network</a> is described as follows because they respect your privacy and keep your data secure. The social networks are not interested in collecting data about you. They don't care about what you're doing, or what you like. They don't want to know who you talk to, or where you go.

<a hreaf="https://technolytical.com/">the social network</a> is not interested in collecting data about you. They don't care about what you're doing, or what you like. They don't want to know who you talk to, or where you go. The social networks only collect the minimum amount of information required for the service that they provide. Your personal information is kept private, and is never shared with other companies without your permission

isc.sans.edu

Dec 26th 2022
5 months ago

https://thehomestore.com.pk/

isc.sans.edu

Dec 26th 2022
5 months ago

Login here to join the discussion.


Diary Archives