Bright Ideas Blog

Open Source

What makes evidence uniquely valuable?

American novelist F. Scott Fitzgerald famously wrote that “the test of a first-rate intelligence is the ability to hold two opposing ideas in mind at the same time, and still retain the ability to function.” All experienced security practitioners... Read more »

Know your environment: Tenable/Corelight integration for prioritized IDS alerts

One of the major causes of alert fatigue for SOCs is a class of alerts that fall in between false positives and useful detections: when an actual attack has been launched, and the detection is working correctly, but the host on the receiving end is... Read more »

World’s first 100G Zeek sensor

As we finished rolling out Corelight’s v21 software release, which saw the delivery of the world’s first 100G, 1U Zeek sensor, I was reminded of when I’d first read the “100G Intrusion Detection” paper written in 2015 at Berkeley Lab. The paper... Read more »

Who’s your fridge talking to at night?

I love origin stories – the tales of grand plans, unforeseen circumstances, and necessity that creates something new. These strange times have resulted in something new from Corelight, and I’d like to share how it came to be. Read more »

Zeek in its sweet spot: Detecting F5’s Big-IP CVE10 (CVE-2020-5902)

Having a CVE 10 unauthenticated Remote Code Execution vulnerability on a central load balancing device? That’s bad… Read more »

Ripple20 Zeek package open sourced

Recently, security research group JSOF released 19 vulnerabilities related to the “Treck” TCP/IP stack. This stack exists on many devices as part of the supply chain of many well known IoT/ICS/device vendors. Think 100s of millions/billions of... Read more »

Analyzing encrypted RDP connections

Microsoft’s Remote Desktop Protocol (RDP) is used to remotely administer systems within Windows environments. RDP is everywhere Windows is and is useful for conducting remote work. Just like every other remote administration tool, RDP can be used... Read more »

Day 1 detection: CVE-2020-0601, a community, and 40 lines of code

On Tuesday, Jan. 14, 2020, the world learned of the vulnerability du jour, CVE-2020-0601. As explained by Microsoft, “a spoofing vulnerability exists in the way Windows CryptoAPI (Crypt32.dll) validates Elliptic Curve Cryptography (ECC)... Read more »

Is there a ‘Z’ in “Vectra”?

Having worked on Zeek (Bro) for well over two decades now, it’s hugely gratifying – and frankly still somewhat amazing – to see how widely it is used in today’s enterprises. Zeek’s real-time analysis capabilities, extensible scripting,... Read more »

How Zeek can provide insights despite encrypted communications

Overview Encrypted communications are ubiquitous. While encryption provides confidentiality, it cannot prevent all means of traffic analysis. Certain protocols, such as SSH and TLS, ensure contents are not directly readable by monitoring systems.... Read more »

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