Unsolicited DNS Queries
This week I started seeing more DNS related activity being identified by Threatintel and that got me curious. While reviewing my logs, I noticed that Wednesday and Thursday had an unusual spike for many inbound unsolicited DNS queries for the domain census.gov.
Wednesday and Thursday, in a period of 24 hours, a total of 1606 queries was received for domain census.gov. The two IPs 37.49.230.173 (1335 requests) was the first set of inbound DNS queries followed by IP 162.253.128.82 (271 requests). IP 162.253.128.82 also sent 272 requests for domain pizzaseo.com yesterday. DNS amplification attack?
There used to be a time when seeing unsolicited queries to identify vulnerable DNS Bind version was very common. A review of my logs for the month of July contained many other domains including various combination of VERSION.BIND (upper/lower case). This is the top 15 DNS questions asked for this month with the top Threatintel associated with the IPs asking the query:
Indicators - Top 10 IPs
37.49.230.173 -> census.gov, sl
162.253.128.82 -> census.gov, pizzaseo.com, sl
185.53.90.85 -> VERSION.BIND, sl
122.5.207.27
45.61.185.201
37.49.229.228
88.80.186.137
207.244.251.235
209.141.59.224
89.248.165.164
Have you noticed an increase in unsolicited DNS queries?
[1] https://www.abuseipdb.com/check/37.49.230.173
[2] https://www.abuseipdb.com/check/162.253.128.82
[3] https://www.iana.org/assignments/dns-parameters/dns-parameters.xhtml
[4] https://us-cert.cisa.gov/ncas/alerts/TA13-088A
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Guy Bruneau IPSS Inc.
My Handler Page
Twitter: GuyBruneau
gbruneau at isc dot sans dot edu
Comments
www
Nov 17th 2022
4 months ago
EEW
Nov 17th 2022
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qwq
Nov 17th 2022
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mashood
Nov 17th 2022
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isc.sans.edu
Nov 23rd 2022
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isc.sans.edu
Nov 23rd 2022
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isc.sans.edu
Dec 3rd 2022
3 months ago
isc.sans.edu
Dec 3rd 2022
3 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. 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
3 months ago
isc.sans.edu
Dec 26th 2022
3 months ago