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Supply Chainsaw: Practical software supply chain attacks for everyone

I recently presented Supply Chainsaw: Practical software supply chain attacks for everyone at the OPCDE technical security conference in Dubai.
To summarize:

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Climate Change Archive

For another short detour from information security… Climate policy is again in the news. The past year has seen record high temperatures, the election of a US President who claimed global warming was a hoax invented by the Chinese (then later backed off), and the 10th anniversary of probably the most authoritative decision regarding climate […]

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Just Too Much Administration – Breaking JEA, PowerShell’s New Security Barrier

Update – 10/9 The PowerShell team has been very responsive in addressing these issues. The documentation should be updated soon (if not yet). Lee Holmes from the PowerShell team also addressed these issues in another DerbyCon presentation: https://www.youtube.com/watch?v=JDtUmue9mIw&feature=youtu.be&t=1766 tl;dr Just Enough Administration (JEA) is a new Windows 10/Server 2016 feature to create granular least privilege […]

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Intercepting Passwords to Escalate Privileges on OS X

A few weeks ago, a lot of attention was paid to Dropbox for “hacking” macs. Dropbox asked for your admin password when it was installed, then used that root access to enable privileges later even if you try to disable them. Despite the internet’s indignation and Dropbox’s impoliteness, Dropbox wasn’t exploiting any vulnerability or breaking […]

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The Security Pretend Game – Sudo and Runas

Common wisdom would have you believe when you run sudo that you are only granting root privileges to one command at one point in time. In reality, you are granting root privileges to any hacker who has ever run any code in any process at any previous time in your account and decided they wanted escalated privileges.
Use completely unprivileged accounts for day-to-day tasks, then log out and log in with a privileged, trusted account for privileged tasks; don’t use runas or sudo from your day-to-day account; it eliminates the security benefits of using the unprivileged account.
Control should always flow from a more privileged and more trusted environment to the less privileged, untrusted environment; going the other way, even when presenting credentials, only allows those credentials to be stolen and hackers to ride up to the higher privileges. This is not a new idea; it is why Microsoft’s #1 recommendation to secure privileged accounts from credential theft is to make it so you cannot log into a privileged account from an ordinary, untrusted workstation. But this principle frequently seems to be forgotten.

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Why the government shouldn’t pay for your college (or most other things)

Recently there has been a renewed push, from presidential candidate Bernie Sanders to the “Million Student March” protests, to have 100% government funded college in the US, and similar policies under the banner of socialism. I thought the below tweet captured my thoughts on the matter well, but it also generated its share of negative […]

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On Suicide and Ashley Madison

Suicide is a difficult topic to discuss. It has claimed many well-known individuals in society at large and in information security. It is a difficult topic for me to discuss since one of my best friends in college committed suicide just a few years ago, something I still struggle to talk about. As many of you know, I am a veteran, and far too many of my fellow veterans have also taken their own lives, at a rate far higher than the population at large. There have been a number of high-profile suicides in my home town recently…

It’s been about 3 1/2 weeks since the dump was released. In a random selection of 20-37 million people matching Ashley Madison’s user demographics, at least 250 to over 400 people have committed suicide. If three Ashley Madison users have committed suicide, they would have a suicide rate 1/100th that of the population at large. What’s going on?

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Credential Assessment – Mapping Privilege Escalation at Scale

I recently gave the following presentation at CanSecWest. (cansecwest.com) You can see the slides below:

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Replacing Passwords With EasyAuth

There’s been a lot of focus on replacing passwords for authentication lately. Google and Twitter have each put forward proposals to address issues in authentication, Google’s based on browser modifications and Twitter’s based on mobile phone usage. Many people advocate multi-factor authentication while others advocate email-based authentication or even more unusual ideas. While many offer […]

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Exploiting Ammyy Admin – developing an 0day

Background For the past few years, a number of groups of scammers have been cold-calling thousands if not millions of people in what’s been referred to as the “Ammyy Scam” or the “Microsoft Tech Support Scam” among other names. The scammers pretend to be from Microsoft or another official group and claim to have detected […]

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