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
Anonymous
Dec 3rd 2022
9 months ago
Anonymous
Dec 3rd 2022
9 months ago
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<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
Anonymous
Dec 26th 2022
8 months ago
Anonymous
Dec 26th 2022
8 months ago
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Anonymous
Dec 26th 2022
8 months ago
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Anonymous
Dec 26th 2022
8 months ago
Anonymous
Dec 26th 2022
8 months ago
https://defineprogramming.com/
Dec 26th 2022
8 months ago
distribute malware. Even if the URL listed on the ad shows a legitimate website, subsequent ad traffic can easily lead to a fake page. Different types of malware are distributed in this manner. I've seen IcedID (Bokbot), Gozi/ISFB, and various information stealers distributed through fake software websites that were provided through Google ad traffic. I submitted malicious files from this example to VirusTotal and found a low rate of detection, with some files not showing as malware at all. Additionally, domains associated with this infection frequently change. That might make it hard to detect.
https://clickercounter.org/
https://defineprogramming.com/
Dec 26th 2022
8 months ago
rthrth
Jan 2nd 2023
8 months ago