Malware

Greylisting Still Works - Part II

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

Of Canaries and Coal Mines: Verisign’s Proposal and Sudden Withdrawal of Domain Anti-Abuse Policy

Too many techies still don't understand the concept of due process, and opportunistic law enforcement agencies, who tend to view due process constraints as an inconvenience, are very happy to take advantage of that. That's the lesson to draw from Verisign's proposal and sudden withdrawal of a new "domain name anti-abuse policy" yesterday. The proposal, which seems to have been intended as a new service to registrars, would have allowed Verisign to perform malware scans on all .com, .net, and .name domain names quarterly when registrars agreed to let them do it. more

When Cyber Awareness Is Fundamentally Lacking

"Smartphones (and tablets, WdN) are invading the battlefield", reports the Economist on its website of 8 October 2011. On the same day the hacking of U.S. drones is reported on by several news sites. ("They appear friendly". Keyloggers???) Is this a coincidence? more

Government and Botnets

The US government is looking at telling ISPs how to deal with compromised customers and botnets. They're a bit late to the party, though. Most of the major commercial ISPs have been implementing significant botnet controls for many years now. more

9 Thoughts on Stepping Up Spam and Malware Enforcement

In a tweet, EU commissioner for the Information Society Neelie Kroes congratulates OPTA on the spam fine for the golf ball printing company Backsound. Since 2004 the Dutch OPTA is the number one spam and malware fighter of the EU with a total of €1.9 million in fines. It made me ask two question to myself: How come that we seldom hear of other spam fines in the EU? And can the EU change this in any way? more

Wikileaks DDoS of Spamhaus: Political Activism at Its Dumbest

A week ago, Paul Vixie wrote a thoughtful piece on the morality of DDos, for both sides of the equation of the Wikileaks issues. In it he summarizes things nicely: "Denial of service is not merely a peaceful protest meant to garner attention for a cause. Denial of service is forcible and it is injurious. It is not like any form of civil disobedience, but rather it is criminal behaviour more like looting." Well said, Paul... more

eco: 100K PCs Cleaned Through Anti-Botnet Center

eco, the German ISP association, mentions on its website today that the 100,000^th PC was cleaned from infection through its PC cleaning program. Since 15 September, German account holders could visit the website to download tools to clean up computers from digital infections. Botfrei ("botfree", translation WdN) is a cooperation between eco and the German government. First figures seem to prove that this is a successful public-private partnership, worth looking into for other countries as a best practice. more

.COM - The Riskiest Top-Level Domain? (Part 2)

Following up from my post yesterday, I thought I would take a look at how spammy each particular TLD is. At the moment, I only track 8 TLD's - .cn, .ru, .com, .net, .org, .info, .biz and .name. To check to see which one is the spammiest, I took all of our post-IP blocked mail and determined how many times those messages occurred in email, and how many times that email was marked as spam... more

United States Is the Most Bot-Infected Country. Right?

A couple of days ago, Threatpost posted an article indicating that the United States is the most bot-infected country... I think that Microsoft's mechanism of measuring bot infections is a good one, not necessarily because it is the most accurate but because it represents the most complete snapshot of botnet statistics. Because Microsoft Windows is installed on so many computers worldwide and because so many users across the world call home to the MSRT, Microsoft is able to collect a very large snapshot of data. more

Policy Failure Enables Mass Malware: Part II (ICANN and OnlineNIC)

On Wednesday September 29th at 1PM there will be a meeting in the Old Executive Building in Washington D.C. with Registries and domain Registrars to discuss illegal Internet sales of prescription drugs. ICANN was originally invited but declined because citing "inappropriateness" . One "U.S." Registrar who definitely will not be in attendance is OnlineNIC more

Why are *.edu’s Compromised so Much?

When it comes to the problem of outbound spam, one of the experiences that I have, and this was reaffirmed at TechEd, is that the number one source of compromised accounts are educational institutions. That is to say, whenever we have an outbound spam problem and have to hunt down where it is coming from, the highest number of these accounts are phished accounts/credentials from users at an educational institution. Why is this? Why does so much spam originate from universities? more

Email’s Not Dead, Neither is Spam

Over the past few years, we have seen a plethora of over-hyped articles in the popular press and blogosphere crowing wrong-headedly about how 'email is dead'. Social networks like Facebook and Twitter, new and as-yet unproven technologies are the supposed death-knell for our old reliable friend, e-mail. I wrote about the rumours of email's death being exaggerated back in 2007 in response to such inanity. Since then, we've seen such a cornucopia of silliness of the 'Such & such is killing email' variety that Mark Brownlow compiled a bunch of articles, and their rebuttals at his excellent site... more

Google Exec: ISPs Must Get Tough on Malware Infested Computers on Their Networks

Ryan Naraine reporting at Threatpost: "Head of Google's anti-malvertising team Eric Davis wants Internet Service Providers (ISPs) to look beyond profits and take a more proactive approach to dealing with malware-infested computers on their networks. During a keynote presentation at the Virus Bulletin conference here, Davis said competitors in the ISP space must look beyond profits and partner on new initiatives to deal with the "parasites" that have taken control of the Internet landscape." more

Should We Make the Possession of Malware a Crime?

In the U.S., it is a federal crime to use malware to intentionally cause "damage without authorization" to a computer that is used in a manner that affects interstate or foreign commerce. Most, if not all, U.S. states outlaw the use of malware to cause damage, as do many countries. The Council of Europe's Convention on Cybercrime, which the United States ratified a few years ago, has a provision concerning the possession of malware. Article 6(1)(b) of the Convention requires parties to the treaty to criminalize the possession of malware "with intent that it be used for the purpose of committing" a crime involving damage to a computer or data... more

An Open Letter to Yahoo!‘s Postmaster

In June 2004, Yahoo! and a number of other companies got together to announce the Anti-Spam Technical Alliance or ASTA. While it appears to have been largely silent since then, ASTA did at least publish an initial set of best practices the widespread adoption of which could possibly have had some impact on spam... The majority of these are clearly aimed at ISPs and end users, but some are either generally or specifically relevant to email providers such as Yahoo!, Google or Microsoft... The problem: Since February this year, we have been receiving a significant quantity of spam emails from Yahoo!'s servers. In addition to their transport via the Yahoo! network, all originate from email addresses in yahoo.com, yahoo.co.uk and one or two other Yahoo! domains. Every such message bears a Yahoo! DomainKeys signature... more