You’re sitting on your couch at home, it’s 8:00 on a Saturday night and one of your interns emails you about a new security vulnerability he just heard about on the latest and greatest podcast. You know that this new vulnerability is going to be the first thing to come up during the morning water cooler talk Monday morning. It’s time for you, the great server admin, to take flight and protect your kin!
Let’s just say there’s a lot to learn from history without quoting Sun Tzu… again. Especially in information and cybersecurity. While much of the birth of cyber realm revolves around the military - many of the members of our community are current or former members of various armed forces - many of us still refer to the military influence of old when working through our business planning and various actions revolving around cybersecurity. A great example is the common use or reference to Boyd’s OODA (Observe–Orient–Decide–Act) loop flow chart in both attack and defensive security applications. In sticking to a military theme, I want to touch on a story from World War II and its applicability in today’s modern cybersecurity world.
Let’s take a look at an often under-utilized aspect of network topology in the small to medium business realm: that’s right, a networking article. But before you run off, what if I told you you could increase performance and lower your production down time with equipment you (might) already have!?
During a penetration test, we’ve found that a common (and easy) way to gather credentials and gain an initial foothold on the client’s network is to perform a Man-in-the-Middle poisoning attack abusing LLMNR & NBT-NS. Depending on how active users are on the network, this attack can give an adversary valuable information almost immediately. Fortunately, with a little knowledge, this attack can be easily remediated.
What is LLMNR & NBT-NS?