Malware

Defending Against the Hackers of 1995

Two factor authentication that uses an uncopyable physical device (such as a cellphone or a security token) as a second factor mitigates most of these threats very effectively. Weaker two factor authentication using digital certificates is a little easier to misuse (as the user can share the certificate with others, or have it copied without them noticing) but still a lot better than a password. Security problems solved, then? more

What Next for Email Service Providers?

It's been a very bad month for ESPs, companies that handle bulk mailings for their clients. Several of them have had internal security breaches, leaking client information, client mailing lists, or both. Many have also seen clients compromised, with the compromised credentials used to send spam. The sequence of events suggests all the ESPs whose clients were compromised were themselves compromised first. (That's how the crooks knew who to attack.) more

Where Every Phisher Knows Your Name

Spear phishing is the unholy love child of email spam and social engineering. It refers to when a message is specifically crafted, using either public or previously stolen information, to fool the recipient into believing that it's legitimate. This personalization is usually fairly general, like mentioning the recipient's employer (easily gleaned from their domain name.) Sometimes they address you by name. Much scarier is when they use more deeply personal information stolen from one of your contacts... more

.COM - The Riskiest Top-Level Domain?

A couple of weeks ago, NetworkWorld published an article indicating that the .com TLD was the riskiest TLD in terms of containing code that can steal passwords or take advantage of browser vulnerabilities to distribute malware... It is unclear to me what they mean by TLD's being risky. The number of domains, 31.3% of .com's being considered risky, what does this actually mean? Is it that 31% of .com's are actually serving up malware or something similar? If so, that seems like a lot because for many of us, nearly 1 in every 3 pages that most people visit would be insecure... more

Resources for Cleaning Your Network

The first step (but certainly not the last) towards saving the internet from spam, malware, and other abuse is to keep your own network clean. A friend of CAUCE, who wishes to remain anonymous, offers these tips and resources to help you identify problem traffic emanating from your network, and clean it up. Though primarily written for ISPs, many of the items below should apply equally well to any network owner. more

ClamAV and the Case of the Missing Mail

Some email discussion lists were all atwitter yesterday, as Sourcefire's open-source anti-virus engine ClamAV version 0.94.x reached its end-of-life. Rather than simply phase this geriatric version out the development team put to halt instances of V0.94 in production yesterday, April 15, 2010. In other words, the ClamAV developers caused version .94 to stop working entirely, and, depending upon the implementation, that meant email to systems using ClamAV also stopped flowing. more

Is Australia a Hot-Bed of Zombie Activity?

About a week ago, I posted that Australia was getting ISPs to boot infected computers off of their network. I commented on whether or not this was a good policy. However, there was one thing in that article that I wanted to comment on but didn't... more

Last Decade in Spam

CAUCE, the Coalition Against Unsolicited Commercial Email, has looked back at the notable events of the last decade in our industry. Each year/link in the post explodes to a discrete blog entry with a month-by-month break-out of notable events. more

Malware and Botnet Operators Setting Up Their Own Data Centers

Dennis Fisher of Thread Post reports: "The malware writers and criminals who run botnets for years have been using shared hosting platforms and so-called bulletproof hosting providers as bases of operations for their online crimes. But, as law enforcement agencies and security experts have moved to take these providers offline, the criminals have taken the next step and begun setting up their own virtual data centers." more

China: Is It Our Cyber Defense Red Herring?

There are thousands of articles perpetuating the claim that China is out to get us on the Internet. And yet, all these discussions are begging the question, is it China attacking? Also, are they even the "usual suspects"?
While I can point to real facts of China making active use of information warfare, cyber warfare, or whatever else you choose to call it (such as the release of 0 days being patched by Microsoft and originally reported by the Taiwanese government, search Microsoft's site), I can also point to Germany (intelligence Trojan horse), the US (The Farewell Dossier) and other countries such as North Korea (without much detail, so questioned)... more

The Story of Conficker and the Industry Response

On November 2, 2009, Microsoft released its seventh edition of the Security and Intelligence Report (SIR). The SIR provides an in-depth perspective on the changing threat landscape including software vulnerability disclosures and exploits, malicious software (malware), and potentially unwanted software. Using data derived from hundreds of millions of Windows computers, and some of the busiest online services on the Internet, this report also provides a detailed analysis of the threat landscape and the changing face of threats and countermeasures and includes updated data on privacy and breach notifications. The following is an excerpt from the SIR, pp 29-32, about the Conficker worm and the industry response that showed an incredible amount of collaboration across vendors. more

MAAWG Issues ISP Guidelines for End-User Bot Removal

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

Yellow Parking Violation Fliers on Windshields Get Drivers to Visit Malicious Website

Security expert and malware analyst, Lenny Zeltser has examined a creative malware distribution method in the real world where fliers placed on windshield of cars scare drivers into visiting a malicious website. Zeltser writes: "Several days ago, yellow fliers were placed on the cards in Grand Forks, ND. They stated: 'PARKING VIOLATION This vehicle is in violation of standard parking regulations. To view pictures with information about your parking preferences, go to website-redacted' ... If you went to the website, you'd see several photos of cars on parking lots in that specific town..." more

A Noteworthy Report on Fast Flux Hosting

This very interesting document was released by ICANN's Generic Names Supporting Organization (GNSO) for public comment yesterday. And it asks some fundamental questions while at the same time pointing to sources such as the Honeynet Alliance's reports on fast flux. more

Eugene Kaspersky: We Need Interpol for Internet, Law Enforcement Agencies Have Jurisdictional Limits

Eugene Kaspersky, co-founder of Internet security software Kaspersky Lab, was recently interviewed PC World where he talked about his views regarding cybersecurity and the evolution of malware. In response to fixing the problems with malware on the Internet, Kapersky says: "The Internet was never designed with security in mind. If I was God, and wanted to fix the Internet, I would start by ensuring that every user has a sort of Internet passport: basically, a means of verifying identity, just like in the real world, with driver's licenses and passports and so on. The second problem is one of jurisdiction. The Internet has no borders, and neither do the criminals who operate on the Internet. However, law enforcement agencies have jurisdictional limits, and are unable to conduct investigations across the globe. ... There is no such thing as anonymity on the Internet, for the average user." more