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SECURITY

UBA, UEBA, & SIEM: Security Management Terms Defined

This blog post seeks to define and explain some common acronyms involved in today’s security management landscape. What is UBA?   UBA stands for User Behavior Analytics and it’s an analytics led threat detection technology. UBA uses machine learning and data science to gain an understanding of how users (humans) within an environment typically behave, then to find risky, anomalous activity that deviates from their normal behavior and may be indicative of a threat. How[…]

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Topics: SECURITY, Uncategorized

Why is Critical Infrastructure So Vulnerable to Insider Threats?

Why is Critical Infrastructure so Vulnerable to Insider Threats?

A recent article in the Washington Post “Russia has developed a cyberweapon that can disrupt power grids, according to new research” came as a real reminder of the constant risk critical infrastructure operators face. The malware, which researchers have dubbed CrashOverride, is known to have disrupted only one energy system in Ukraine but could be deployed against U.S. electric transmission and distribution systems. The consequences of insider threats to critical infrastructure operators are much greater[…]

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Topics: SECURITY

Too Many Alerts… Just Give Me the Interesting Ones!

Security analysts often wrestle with the high volume of alerts generated from security systems and much like the protagonist in The Boy Who Cried Wolf, many alerts tend to be ignored. Human analysts quickly learn to ignore repeated alerts in order to focus on the interesting ones.  Learning to screen out repeated alerts as false positives allows analysts to focus their finite time where it matters most. A natural question, then, is whether we can[…]

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Topics: data science, SECURITY

Ransomworm: Don’t Cry – Act.

WannaCry

In July last year, we released our research report on the Anatomy of a Ransomware attack in which we looked into both the financial model of ransomware and then detection as it unfolds. Due to the recent WannaCry ransomware craze, we think it’s time to revisit. When we addressed ransomware last year, we made a significant comment about the ever-evolving nature of malicious software. We predicted that in the near future (evidently now) ransomware will move[…]

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Topics: data science, ransomware, SECURITY, SIEM, Uncategorized

A Machine Learning Study on Phishing URL Detection

Many network attack vectors start with a link to a phishing URL. A carefully crafted email containing the malicious link is sent to an unsuspecting employee. Once he or she clicks on or responds to the phishing URL, the cycle of information loss and damage begins. It would then seem highly desirable to nip the problem early by identifying and alerting on these malicious links. In this blog, I’ll share some research notes here on[…]

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Topics: data science, SECURITY

Flipping the SIEM Value Equation

If you operate a SIEM, you probably deeply sympathize with what I’m about to say. SIEMs are over priced. More accurately, SIEMs are overpriced compared to the value they actually provide to their customers. Not only are these systems responsible for draining security budgets, they aren’t effective in helping customers to effectively manage security incidents. The Economics of SIEMs (and Razors) All legacy SIEMs have at least one thing in common, some form of data[…]

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Topics: SECURITY, SIEM, TIPS AND TRICKS

On True Positives and Security Incidents

The Potential POS Breach Exabeam recently discovered unusual behavior at one of our retail customers. On some of the most sensitive point of sale (POS) devices, a local account was added to a privileged active directory group. Some of the audit functionalities on these machines were then disabled and a few minutes later the account was removed from the privileged group and the audit functionalities were reactivated. This was happening on hundreds of POSs at[…]

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Topics: CUSTOMERS, SECURITY

First-time Access to an Asset - Is it Risky or Not?: A Machine Learning Question

Looking for outliers or something different from the baseline is a typical detection strategy in user and entity behavior analytics (UEBA). One example is a user’s first-time access to an asset such as a server, a device or an application. The logic is sound and is often used as an example in the press for behavior-based analytics. However, it is an open secret among the analytics practitioners that alerts of this type has a high[…]

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Topics: data science, SECURITY

Check Out Exabeam Incident Responder

One of the most common questions we heard when talking to potential customers about our UEBA product was “Okay, your system found something. Now what do I do?” It was eye-opening to see so many organizations that simply didn’t have response processes defined, and had limited tools to run those processes, anyway. This lack of incident response expertise drove the development of our recently-announced Exabeam Incident Responder product. Incident Responder goes far beyond the automatic[…]

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Topics: SECURITY

The World Has Changed; Shouldn’t Your Security Change, Too?

From day one, Exabeam had a vision for something better than today’s SIEM solutions. We felt these products were fundamentally broken: SIEM log management was built on old, proprietary technology and was (over)priced by the byte; SIEM correlation rules were a mess and ineffective, and they caused more work for analysts than they eliminated. SIEM was broken and the opportunity to make something massively better was clear. Our first step was to win the UEBA[…]

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Topics: CUSTOMERS, data science, SECURITY
2017