Added 127 new domains since 08.25.2015
Name a security breach or sample of malware in the last five years and you will come across a fairly common denominator: the malware (or the method of data exfiltration) used a “Dynamic DNS” hostname to connect to the Internet….
The use of dynamic DNS providers for malicious purposes is extremely wide spread. OpenDNS Security Labs reported that over 56% of subdomains on some DDNS providers were malicious. Similarly, Cisco reported that dynamic DNS linked websites were 19% more likely to be malicious than other websites. The question is not “does the threat exist?” but rather, how does a defender detect these domains or mitigate them?
One idea is to create a lookup table by using a great blog post by OpenDNS from 2015 that discusses the top 20 most malicious dynamic DNS providers. Another option is downloading all known dynamic DNS providers (provided by www.malware-domains.com). This list is much more comprehensive than the “top 20”, but it may increase your false positives as it is a substantially larger list. This zip requires some modifications to turn into a lookup table, but you can find scripts on github to help you automate the process…….
Please let us know of any Dynamic DNS Domains not on the list and we’ll add them.
“Immortal” Malware Domains are those which were identified as malicious anywhere between 90 and 360 days ago. but according to google safebrowsing, are still actively involved in badness. Some of these domains have been on the DNS-BH List for YEARS.
We also added about 70 new domains to our list of long-lived “immortal” malware domains. The list is up to 4022 entries.
The list of “the immortals: immortal_domains.txt
Note: this list is incorporated in the main list, there is no need to download both lists if you already download any zone files.
Last night’s update had an incorrect listing, please update your blocklists ASAP. Thanks
6/4 – 216 domains
6/7 – 158 domains
Domains included: cryptowall, njrat, password stealers, andromeda, etc.
We’ve delisted 6417 domains and added 235 domains to the “immortals” list. Note that the “immortal”, or very long-live malware domains, are already listed in the main list, it’s just that those domains have been flagged multiple times as malicious. Some of the domains on the “immortals” list were originally flagged as far back as 2009!
List of immortal domains is here.
List of removed domains can be found here
5/15 – 230 Domains
5/21 – 135 Domains
5/25 – 104 Domains