Category Archives: Intenret coordination

Did the February 2012 spam surge come from one botnet?

SpamRankings.net saw
AS 21788NOC
AS 27229WEBHOST-ASN1
AS 46475LIMESTONENETWORKS
AS 33055BCC-65-182-96-0-PHX
AS 15149EZZI-101-BGP
AS 13768PEER1
AS 10439CARINET
AS 7796ATMLINK
a huge surge in spam from some U.S. ASNs, mostly from ones that hadn’t even been in the top 10 before, with possible correlations in one ASN each from Peru and Canada. Did all this spam come from the same botnet?

Maybe not all, but most. Eight out of the U.S. top 10 for February show very close correlation with one botnet, Ogee. They are listed in the table on the right and shown in the chart below:


Left Axis: ASN volume (spam messages); Right Axis: Botnet volume (dotted curves)

The chart also shows some ASNs reacted quickly and stopped the spamming, while others got worse. It’s a busy chart, so let’s look at simpler charts for one example each of resilient and susceptible ASNs.

AS 21788 NOC was one of the first and worst affected by this spam surge: Continue reading →

Big U.S. Spam Spike in February 2012 SpamRankings.net

What could push the U.S. from 13 to 2 in worldwide SpamRankings.net, and way up to number one for the last week of February 2012?

In the U.S. rankings by ASN, seven out of ten are new, and NOC number 1 came up from number 9. Something pretty bad is going on. So bad Comcast didn’t place in the top 10 at all, for the first time in recent memory!

NOC has had this problem before, in July and November 2011, but never with this amount of spam volume. And this time many other ASNs show the same pattern.

The same issue may be in the Canadian rankings as well: AS 32613 IWEB-AS jumped from 8 to 1 for the month, with almost all the increase in the same last week of the month as for the U.S. problem ASNs.

There was even a similar curve in the World rankings, for Telefonica del Peru’s AS 6147 SAA.

Our next step is to drill down to see if these ASNs were infected by the same botnet. We did that for the medical ASNs last month, but this is a much bigger spam event this month.

-jsq

Davos discovers cyber attacks

Cyber attacks made the Davos Top 5 Global Risks in Terms of Likelihood. Davos, the annual conclave of the hyper-rich and famously elected, has also discovered Severe income disparity and Water supply crisis, so maybe they’re becoming more realistic.

However, in Figure 17 on page 25 they’ve got Cyber attacks as an origin risk, along with Massive incident of data fraud or theft and Massive digital misinformation. I think they’re missing the point, which is the real origin risk is poor infosec, and the origin of that is vendors like MSFT knowingly shipping systems with design flaws and people and organizations running them while hiding such problems.

Interesting comment on page 26: Continue reading →

Is January’s medical spam caused by botnets?

Remember those three spamming medical organizations PSBL saw and the spike from CSHS that SpamRankings.net found in CBL data? Digging into the underlying data, and graphing them all on the same chart, we see this:

Even though the three three-digit-spamming medicos spam oddly coherently, we don’t find any botnets for them. This may be because most of that spam was seen by PSBL, and our botnet assignments come from CBL. CBL didn’t see any spam from those ASNs, so it didn’t have anything to assign for botnets. Maybe they’re infested by the same botnet; maybe not; can’t tell.

But it was CBL that saw that big spam spike for AS 22328 CSHS. And CBL did assign a botnet to that: Lethic. For all but two days of CSHS spam shown, CBL assigned Lethic to the total amount of spam from CSHS for that day. That may be because all that CSHS spam is coming from a single computer.

Of course, CBL’s botnet assignments are not perfect, but infosec professionals tell me CBL is about as good as it gets for that, so there’s a good chance this botnet assignment is correct.

The good news is that all of the trio of three-digit spamming medicos decreased their spam and even went to zero during the period shown.

And CSHS spam peaked at the end of January and started back down in February.

Pretty soon there may be once again little or no spam from medical organizations to rank.

-jsq

India, Bank of America, and CyberSURF: December 2011 SpamRankings.net

In SpamRankings.net for December 2011, worldwide India spammed the most, while Bank of America topped one U.S. ranking, and CyberSURF peaked in Canada, but Cleveland Clinic cleaned up its act.

More on those and other interesting rankings in later posts.

-jsq

China does not lead Country Rankings from SpamRankings.net

An area where China does not lead the world: Country rankings by SpamRankings.net. China is only #13, but Brazil, Russia, and India (the other three BRICs) are in the top five countries by total spam messages for October 2011. U.S. is #10.

Vietnam came from behind a few months ago to place second for October.

Brazil had slumped as low as #6 in July, but has pulled back up into the leading pack.

After the top five, it’s a long-tail distribution indeed. Continue reading →

How to leverage botnet takedowns

What is to be done when botnet takedowns don’t produce lasting benefits?

At the Telecommunications Policy and Research Conference in Arlington, VA in September, I gave a paper about Rustock Botnet and ASNs. Most of the paper is about effects of a specific takedown (March 2011) and a specific slowdown (December 2010) on specific botnets (Rustock, Lethic, Maazben, etc.) and specific ASNs (Korea Telecom’s AS 4766, India’s National Internet Backbone’s AS 9829, and many others).

The detailed drilldowns also motivate a higher level policy discussion.

Knock one down, two more pop up: Whack-a-mole is fun, but not a solution. Need many more takedowns, oor many more organizations playing. How do we get orgs to do that? …
There is extensive theoretical literature that indicates Continue reading →

You can help Stop-eCrime

Stop-eCrime aims to reduce electronic crime by increasing transparency of information and communications technologies.

Born out of 2010 meetings organized by the Anti-Phishing Working Group and the IEEE Standards Association, Stop-eCrime has already been working on ecrime event data exchange standards and protocols, as well as operational protocols for dealing with computers compromised by ecrime.

Now Stop-eCrime wants you to help tie these technical and operational levels together into an ecrime detection and response system coordinated among the public, business, academia, and government. There’s plenty of work to be done on technical standards and operational protocols (such as glossaries, metrics, and monetary effects), plus Stop-eCrime needs educational materials and marketing to explain incentives for everyone to participate in reducing ecrime.

Here are the details.

If you want to help, or if you have questions, contact:

https://mentor.ieee.org/stop-ecrime
Chair: Paul Laudanski <paul@laudanski.com>

-jsq

“botnet herders can add it to its spam-spewing botnet” —Fahmida Y. Rashid in eWeek.com

This reporter spits out a string of alliterative language that labels the problem that SpamRankings.net helps diagnose.

Fahmida Y. Rashid wrote in eWeek.com 8 June 2011, UT Researchers Launch SpamRankings to Flag Hospitals Hijacked by Spammers:

“Poor security measures are generally responsible for employee workstations getting compromised, either by spam or malicious Web content. Once the machine is compromised, the botnet herders can add it to its spam-spewing botnet to send out malware to even more people. The original employee or the organization rarely has any idea the machine has been hijacked for this purpose.”
That’s a pretty good explanation for why outbound spam is a proxy for poor infosec.

-jsq