One can read in an Associated Press article that the US State Department have their email system bogged down due to too many people use the Reply-All function in their email client. IT Departments have asked people to not use Reply-All and also threaten with disciplinary action. To me, that is the wrong path forward. more
Last week the Federal Trade Commission settled a lawsuit against Yesmail, a large ESP (Email Service Provider). The facts of the case are not in dispute, but their meaning is. Yesmail, like most large ESPs, has absorbed a number of its smaller competitors over the years including a company called @Once. Back in 2004, they screwed up their incoming mail so that a whole lot of bounces and opt-out requests were erroneously filtered out as spam. As a result, thousands of people who'd told @Once to stop sending them mail kept getting mail anyway... more
Phishing, stealing personal information by impersonating a trusted organization, is a big problem that's not going away. Most antiphishing techniques to date have attempted to recognize fake e-mail and fake web sites, but this hasn't been particularly effective. A more promising approach is to brand the real mail and real web sites. more
If you had an e-mail address any time in the past six years, you've probably gotten spam for something called VigRX for Men, with fairly specific promises that it will make you, ah, manlier. I always wondered how many nitwits could fall for this kind of nonsense. Thanks to a recent class action settlement, we now know that there have been quite a lot of them. A class action suit filed in 2001 in Colorado settled recently, with some quite amazing info in the documents available at http://lemsettlement.com. LEM stands for Leading Edge Marketing, the name used by the defendants for several companies in the US, Canada, and the Bahamas. more
Previously, I wrote that the total amount of spam that we are seeing has seen a significant decline over the past year and a half. What does this mean in real terms? Are we finally winning the fight against spam? There are multiple angles. On the one hand, processing spam takes significant system resources... more
At the recent Anti-Phishing Working Group meeting in San Francisco, Rod Rasmussen and I published our latest APWG Global Phishing Survey. Phishing is a distinct kind of e-crime, one that's possible to measure and analyze in depth. Our report is a look at how criminals act and react, and what the implications are for the domain name industry. more
In my last post I blogged about greylisting, a well-known anti-spam technique for rejecting spam sent by botnets. When a mail server receives a an attempt to deliver mail from an IP address that's never sent mail before, it rejects the message with a "soft fail" error which tells the sender to try again later. Real mail senders always retry, badly written spamware often doesn't. I found that even though everyone knows about greylisting, about 2/3 of IPs don't successfully retry. more
There have been a number of reports recently about customer lists leaking out through Email Service Providers (ESPs). In one case, the ESP attributed the leak to an outside hack. In other cases, the ESPs and companies involved have kept the information very quiet and not told anyone that data was leaked. People do notice, though, when they use single use addresses or tagged addresses and know to whom each address was submitted. Data security is not something that can be glossed over and ignored. more
Not so long ago, the notion of introducing laws and other regulatory responses to address cyber security issues was regarded with significant hesitation by governments and policy makers. To some extent, this hesitation may well have stemmed from a general perception by those who do not work directly in the field that the world of cyber security is somewhat of a 'dark art'. More recently, however, there has been a substantial shift in this attitude, with proposals to regulate a range of cyber security related matters becoming increasingly numerous. more
e360 initially filed suit against Comcast early in 2008. They asserted a number of things, including that Comcast was fraudulently returning "user unknown" notices and that they were certified by ReturnPath. Comcast filed a countersuit alleging violations of CAN SPAM, violations of the computer fraud and abuse act, as well as a number of other things including abuse of process. In April of 2008 the judge ruled in favor of Comcast and dismissed e360's case, while allowing the countersuit to proceed. more
There are a number of sources talking about the takedown of the Mariposa botnet... Spanish authorities, working with researchers from Panda Labs, Defence Intelligence and a couple of other educational institutions, took down the Mariposa botnet (Mariposa is the Spanish word for "butterfly"). The Mariposa botnet is an absolutely enormous with around 12 million (!) nodes doing its bidding. It was involved in things like credit card phishing and identity fraud. more
Courtesy forwards have been a standard feature of e-mail systems about as long as there have been e-mail systems. A user moves or changes jobs or something, and rather than just closing the account, the mail system forwards all the mail to the user's new address. Or a user with multiple addresses forwards them all to one place to be able to read all the mail together. Since forwarding is very cheap, it's quite common for forwards to persist for many years. Unfortunately, forwarding is yet another thing that spam has screwed up. more
For several months I have been working with the Spamhaus project on a whitelist, which we announced to the public this week. While this is hardly the first mail whitelist, our goals are somewhat different from other whitelists. Think of e-mail as ranging from inky black to pearly white... more
How do we help coordinate responses to attacks against Internet infrastructure and users? Internet technology has to scale or it won't survive for long as the network of networks grows ever larger. But it's not just the technology, it's also the people, processes and organisations involved in developing, operating and evolving the Internet that need ways to scale up to the challenges that a growing global network can create. more
Together with Thorsten Holz, I recently published a paper on fast flux botnet behaviors, "As the Net Churns: Fast-Flux Botnet Observations," based on data we gathered in our ATLAS platform. Fast flux service networks utilize botnets to distribute the web servers to the infected PCs... One of the most well known fast flux botnets has been the Storm Worm botnet, which uses the zombies to spam, send out new enticements to infect users, and to host the malicious website which delivers the malcode. more
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