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Phishing Attacks Classified: Big Phish vs. Little Phishes

The CMU CERT team I referred to in my last post also has some interesting analysis on the actual mechanics of these phishing attacks. Based on reviewing their incident database, the CERT team was able to categorize phishing attacks into two broader types: single- versus multi-stage. What’s the difference? Think of single-stage as catching lots of…

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Point-of-Sale Cyber Attacks Are Back With Backoff

Point-of-Sale attacks are back in the news. But they never really left us. In the wake of the Target attack, the FBI issued a bulletin in January warning about future incidents. They identified the malware type (RAM scrapers) and the infection vector (phish mails, and compromised websites or “watering holes”). And they even pointed out…

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In Search of Kerberos’s Golden Ticket

In a Kerberos environment, all users get tickets, or more specifically TGTs (Ticketing Granting Tickets). It’s the starting point for gaining access to services—network files, email, apps, etc.  In Windows, there’s one user who stands out, the all-powerful domain administrator. They have access to the keys of the kingdom, literally—the Domain Controller on which the…

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Kerberos Weaknesses: Pass the Ticket Is a Real Threat

August is always a good time to check up on the dark side.  Black Hat had its annual conference earlier this month, and there’s always presentations worth looking at.  I’ve been writing about Kerberos recently, and while it’s a big improvement over Microsoft’s NLTM, nothing is ever perfect.  I came across a presentation that looks…

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Authentication Lessons From the Magic Kingdom: A Closer Look at Kerberos, Part II

Let’s continue our journey into the Magic Kingdom as a way to explore Kerberos. Sure the comparison doesn’t completely track, but it’s close and easy enough to grasp that I think you won’t mind missing—trust me on this—the standard Kerberos protocol diagrams. Back to Disney World: you’re now in the park with your passport booklet…

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Top Five Most Dangerous Software Errors

Over the years, Mitre, the MIT research group, has been analyzing software bugs and missteps that hackers have been able to exploit. Their Common Vulnerabilities and Exposures (CVE) classifications are something of a de-facto standard used for describing the root software causes in an attack.  Working with SANS, the Mitre CVE team has come up…

Billion User Breach PSA

The latest story which has the security world in tizzy is the New York Times report that Russian hackers have amassed more than a billion Internet passwords. Bruce Schneier wrote in interesting post yesterday calling into question the validity of this report. He points out that Hold Security, the company that is hyping this breach, is not only…

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Authentication Lessons from the Magic Kingdom: A Closer Look at Kerberos, Part I

The flaws in NTLM I’ve been writing about might lead you to believe that highly-secure authentication in a distributed environment is beyond the reach of mankind. Thankfully, resistance against hackers is not futile. An advanced civilization, MIT researchers in the 1980s to be exact, developed open-source Kerberos authentication software, which has stood the test of…

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Deadly credential vulnerabilities found in mobile apps

I’m beginning to be known around here as the bearer of bad news on authentication hacks. Unfortunately, I have more to share. In June, researchers at Columbia University announced they discovered secret login keys hidden in thousands of Google Play apps. Left by developers to access their own cloud-based accounts—on Facebook, AWS, Twitter, and other…

Top Minds in Online Privacy

Top 8 Minds in Online Privacy

1. Alessandro Acquisti @ssnstudy Acquisti is a professor of computer science at Carnegie-Mellon University, and is also a researcher at Cylab, a data security research center at CMU. He’s best known for an experiment in which he photographed random students on the Mellon campus and used off-the-shelf facial recognition software to match against head shots…