<img height="1" width="1" style="display:none" src="https://www.facebook.com/tr?id=439793516377641&amp;ev=PageView&amp;noscript=1">

CATEGORY ARCHIVES: ip-reputation

Extending the traffic metaphor

Jeff Bardin has a post up as his CSO Online blog which has a nice metaphor for data security by comparing it to vehicular traffic on highways. The metaphor comparing data to cars is pretty good (and not unique to the security space, lots and lots of traffic management and queuing strategies are well understood in terms of highways and cars) and I kind of like the way he suggests that a tool can just send 'red' (i.e. bad) cars for detailed inspection etc.

Read More

Share this:

The Worst AS in the world

In an email discussion over the weekend (which was based in part on this post by Brian Krebs) about the distributors of malware it was noted that much of it came from one particular AS - AS49469 Sa Nova Telecom Grup SRL. As is usually the case when I get this kind of email I take a look at our database to see what we know about the subject. In this case I discovered that AS49469 is one of the 64 ASes whose IP address ranges are completely covered by one or more of our blocklists.

Read More

Share this:

Russian Business Network Penguins

As those who visit our home page may have noticed we have a section where we note the countries with the worst IP reputation. We divide it up between big countries and small ones and determine the relative badness by calculating the proportion of the country's reported IP addresses that are bad.

Read More

Share this:

Latest Adobe Zeroday - "Call Home" Blocked by ThreatSTOP

Adobe have just announced yet another Zeroday Flash etc. exploit that has been seen in the wild in emailed Microsoft Word documents. The document installs the usual sort of backdoor trojan.

Read More

Share this:

ThreatSTOP and IPv6

Since the Internet is nearly out of IPv4 addresses, people are finally getting serious about using IPv6. As people start deploying IPv6 we will find new bugs and loopholes that crooks can exploit. Holes like this one that mean that a bot on a network could act as the "man in the middle" for everyone else nearby.

Read More

Share this:

IP Reputation - Responsiveness is Key

Thanks to an email from one of the folks evaluating ThreatSTOP, I did a quick comparison check to see how much quicker ThreatSTOP is to report bad IP addresses. This is very important as new, unknown IP addresses, can wreak havoc until they are tracked down.

A brief aside: once an IP address becomes known as, say, a botnet C&C host it will start to get blocked. In fact we quite often see IP addresses fall down the slippery slope of recividism. First they start out as malware droppers or C&C hosts, then they become phishing sites or spammers, finally they become recon bots searching for open ports and vulnerabilities in servers. The key to this progression is that the IP address gradually becomes better known as bad and that the things it does first, when it is unknown, are the most dangerous to the Internet. Hence the quicker they are picked up the quicker people can protect against them.

So, getting back to the responsiveness question. Our evaluator compared us to McAfee's Trusted Source (which is BTW an awesome resource) and noted that we appeared to report IP addresses faster. That is to say we'd report an IP address as bad and then some time later Trusted Source would also report it as bad. Well this was something that needed a bit of confirmation so I took our current list of the botnet C&C hosts and compared it with the list from 24 hours earlier. Of the 1911 ip addresses currently in that feed 44 were new (I'll append the list to this post) and I checked all 44 with Trusted Source.

The results:

16 were either 'unverified' or 'minimal risk' for both web and email.
12 were listed as bad for email but either 'unverified' or 'minimal risk' for web
6 were listed as bad for web but either 'unverified' or 'minimal risk' for email
10 were listed as bad for both web and email.

Of the 22 that were listed as bad for email and hence could be assumed to have history, ThreatSTOP knew about half (13) as being definitively bad and 11 we had no knowledge of other than as botnet C&C. However I'm unclear about the accuracy of McAfee's Email rating since a number of those (in fact it was probably all 11 but I gave up checking) had no email data graphs of history so it seems likely that the email report was as fresh as the the botnet one and probably related.

Finally I did a sample of the 41 that were between 24 and 48 hours old and McAfee's Trusted Source appeared to know about almost all of them as bad for web. That is to be expected.

So to recap. 44 new addresses in 24 hours of the most dangerous sorts on the Internet - that is botnet C&C hosts. Of those ThreatSTOP in fact already knew of 11 as did McAfee. We were blocking 16 that McAfee had no idea of. We blocked 6 at about the same time that McAfee knew about them and 11 more may have been known by McAfee first, but not necessarily as botnet C&Cs.

I imagine I'll run this test again in a week or two to confirm this finding but it looks like yes ThreatSTOP is faster to identify bad IP addresses, and since they get automatically downloaded onto our subscriber's firewalls, far faster to provide protection against bots calling home with stolen data.

Read More

Share this:

IPv6 and IP reputation

The Register has an article today about how IPv6 will make (spam) blocklists fail. The article is correct that current DNSBL techniques - as developed by Paul Vixie & co - will struggle but that doesn't in fact mean that IPv6 kills IP (or DNS) reputation, all it means is that the exact technique used by the current DNSBL solutions is not IPv6 compatible.

Read More

Share this:

IP Reputation and the Limits of Metaphors

Our fellow security professionals at Damballa have written a pretty good explanation of IP reputation and the benefits of applying it. Since our business at ThreatSTOP is to provide IP reputation perhaps we should ask them to write more copy... However, while the article, as a whole is good, there are a few places where I think it could be improved.

Read More

Share this:

Home Page

OTHER THREATSTOP OUTLETS

  1. ThreatSTOP on YouTube
  2. ThreatSTOP on Twitter