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Cal Jewell

Former Employee - Principal Technical Trainer

Cal is a Senior Technical Trainer at ExtraHop.

Posts by this author

Bodycams and Firewalls: The Internet is Watching, Are You?

May 22, 2022

A city discovered that sensitive data was exposed to the internet. Learn how they used ExtraHop Reveal(x) to investigate the problem and avoid becoming a target.

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The Bad Guys Only Have to Be Wrong Once

February 3, 2022

A real-world attack proves why the defenders have the post-compromise advantage with network detection and response.

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DoublePulsar Detected

November 9, 2021

Learn how one organization steps into action when DoublePulsar—a backdoor implant that was used in the infamous WannaCry attack—is detected.

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Weak Cryptography Search Leads to Unexpected Discoveries with Reveal(x)

September 30, 2021

When an enterprise discovers the easy way to search for weak cryptography, they find something a little more sinister.

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When Vendor Practices Put Security at Risk

September 10, 2021

How the security practices of third-party vendors leave the door open for hackers to steal enterprise data.

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On the Lookout for Credential-Sharing Gaps

August 10, 2021

Sharing credentials over outdated protocols puts your organization at risk of cyberattack. Learn what to do about it.

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Cryptography Training Reveals a Security Surprise

July 13, 2021

A journey into cryptography revealed security exposure from an unlikely on-campus vendor.

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How DNS Traffic Can Be a Canary in the Coal Mine

June 18, 2021

How a government agency stopped a DNS amplification attack attempt dead in its tracks.

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Act Two: The Vendor Responds

February 4, 2021

The second installment of our story about investigating some very strange behavior happening on the network.

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When You Detect Network Enumeration: A Real-World Example in Two Acts

February 3, 2021

A network enumeration detection kicks off an investogation of some very strange behavior happening on the network. Learn more about this real-world example.

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Threat Detection & Investigation in Active Directory

February 20, 2020

See how easy it is to track down potentially compromised assets with ExtraHop Reveal(x) in this real-world example discovered during an ExtraHop training session.

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