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Messaging Anti-Abuse Working Group (MAAWG) has issued the first best practices aimed at helping the global ISP industry work more closely with consumers to recognize and remove bot infections on end-users' machines. The paper outlines a three-step approach with recommendations for detecting bots, notifying users that their computers have been compromised, and guiding them in removing the malware. more
In my department, we block about 92% of our total email (around 2.5 billion per day) at the network edge without accepting the message. When we do that, we don't see any traffic from that IP anymore and don't keep stats on it due to the overwhelming volume of mail. However, we do keep stats on mail that we block with our content filter. I decided to go and calculate how much spam we receive from each country by mapping the source IP back to its source country... more
Nguyen Minh Duc, senior security director at Bach Khoa Internetwork Security (Bkis), says that the source of recent cyberattack against US and South Korean government websites was not North Korea -- as widely reported -- but UK. Based on Bkis analysis, a report today by Nguyen Minh Duc says that a master server located in UK was found to control the 8 Command and Control servers responsible for the series of cyberattacks last week.
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This post isn't about -- or isn't only about -- the use of computer technology to commit crimes. It's more about the use of computer technology to commit war. A few weeks ago, I was part of a conversation about the legal issues cyberwarfare raises. We were talking about various scenarios -- e.g., a hostile nation-state uses cyberspace to attack the U.S. infrastructure by crippling or shutting down a power grid, air traffic control systems, financial system, etc. Mostly, we were focusing on issues that went to the laws of war, such as how and when a nation-state that is the target of a cyberattack can determine the attack is war, rather than cybercrime or cyberterrorism. more
In a blog post last week, Gary Warner, director of research in computer forensics at the University of Alabama's (UAB) computer and information sciences department, wrote that it is well past time for someone to declare a "Spam Crisis in China". The warning comes along with UAB's reports that most of the spam they receive has ties to China. "It is very normal that more than one-third of the domain names we see each day in spam messages come from China," Warner wrote. "When one also considers the many '.com' and '.ru' domain names which are also hosted in China, the problem is much worse. More than half of all spam either uses domain names registered in China, is sent from computers in China, or uses computer in China to host their web pages." more
If you put 65 million people in a locked room, they’re going to find all the exits pretty quickly, and maybe make a few of their own. In the case of Iran’s crippled-but-still-connected Internet, that means finding a continuous supply of proxy servers that allow continued access to unfiltered international web content like Twitter, Gmail, and the BBC... 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
This is a follow-up to my previous post on Cybersecurity and the White House. It illustrates an actual cyberwarfare attack against Estonia in 2007 and how it can be a legitimate national security issue. Estonia is one of the most wired countries in eastern Europe. In spite of its status of being a former Soviet republic, it relies on the internet for a substantial portion of everyday life -- communications, financial transactions, news, shopping and restaurant reservations all use the Internet. Indeed, in 2000, the Estonian government declared Internet access a basic human right... more
New research from the Anti-Phishing Working Group (APWG) has found that up to 81% of domain names used for phishing are legitimate domains that have been hacked. More specifically, out of the 30,454 phishing domains under observation, only 5,591 domain names (18.5%) were registered by phishers according to APWG. The remaining small percentage of the domains used in phishing belonged to subdomain resellers such as ISPs and other web-based services. more
Before we get into what DNSSEC is and the benefits of it, let's talk about some of the other potential pitfalls of DNS. One of the most significant issues we have to deal with are denial-of-service (DoS) attacks. While DoS attacks are not specific to DNS we have seen DNS be a frequent target of these attacks. more
A few months ago, I made a post about IPv6 security. I've caught some flak for saying that IPv6 isn't a security issue. I still stand by this position. This is not to say that you should ignore security considerations when deploying IPv6. All I claim is that deploying IPv6 in and of itself does not make an organization any more or less secure. This point was made by Dr. Joe St. Sauver, of the University of Oregon... more
According to Shanghai Daily, there has been an "organized Internet attack on Tuesday night which caused serious congestion in several provinces [in China] and left millions of users unable to gain access to the Internet." This is the first time the regulator has published news about an investigation into an online attack in China within 24 hours, says Shanghai Daily. ..."It was an attack on DNS (Domain Name System) and the carriers and related firms should do more back-up to avoid similar incidents," the ministry said in a statement. more
News broke this week about an attack in Puerto Rico that caused the local websites of Google, Microsoft, Yahoo, Coca-Cola, PayPal, Nike, Dell and Nokia to be redirected for a few hours to a phony website. The website was all black except for a taunting message from the computer hacker responsible for the attack... more
With the Online Trust Alliance Town Hall Meeting and Email Authentication Roundtable next week as well as the RSA Conference, I decided to pause and think about where we are and where we might be headed with regard to email authentication. Over the years, many of us have collectively worked to provide a framework for authenticating email... more
With the recent attacks against high-profile New Zealand domain names including Coca-Cola.co.nz and F-Secure.co.nz, fingers are naturally pointing to Domainz, the registrar of record for these domains, as the party responsible for this lapse in security. While domain name registrars certainly need to ensure the security and stability of their systems, domain name registries must also step up and take responsibility for mitigating risks posed by hackers... more
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