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Cisco Umbrella Blog

Cybersecurity Research

Hardening Your Infrastructure to Mitigate Leaks of Sensitive Data

Author avatar of Security Research TeamSecurity Research Team
Updated — April 8, 2020 • 8 minute read
View blog >

In this post, OpenDNS Researcher Frank Denis explains various strategies to harden your infrastructure against sensitive data leaks.

Docker private registry authentication

Author avatar of Alex IanchiciAlex Ianchici
Updated — March 5, 2020 • 3 minute read
View blog >

The Hacker's Manifesto Revisited

Author avatar of Thibault ReuilleThibault Reuille
Updated — October 15, 2020 • 5 minute read
View blog >

Today, we would like to give a new lease on life to The Hacker's Manifesto using OpenGraphiti, our data visualization engine.

Cracking Pushdo and How to Bust Through Most Crypters

Author avatar of Security Research TeamSecurity Research Team
Updated — August 3, 2020 • 6 minute read
View blog >

How OpenDNS reverse engineered the latest Pushdo variant to obtain its DGA.

Visualizing Domain Registration Relationships by WHOIS Information

Author avatar of Anthony KaszaAnthony Kasza
Updated — August 3, 2020 • 2 minute read
View blog >

What do you get when you compare a list of known malicious domains to email addresses previously used to register at least one malicious domain?

Realistic Network Rendering with PovRay

Author avatar of Thibault ReuilleThibault Reuille
Updated — March 27, 2020 • 4 minute read
View blog >

We've presented a fun way to take advantage of PovRay to generate realistic pictures of our datasets created with the Security Graph and its API.

Xerox Printer Beacons And The Importance of Documentation

Author avatar of Andrew HayAndrew Hay
Updated — March 11, 2020 • 8 minute read
View blog >

While performing some research, we happened to notice a rather odd Xerox domain name that a particular server was beaconing out to. Could this be malware?

DNS Amplification Attacks

Author avatar of David CornellDavid Cornell
Updated — December 1, 2022 • 4 minute read
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An in-depth look at DNS amplification attacks, what they are, how they work and how to protect yourself against this type of DDOS attack.

WordPress DDoS Visibility from OpenDNS

Author avatar of Andrew HayAndrew Hay
Updated — October 15, 2020 • 3 minute read
View blog >

Analysis of the 160,000 site WordPress DDoS attack as seen through the intelligence provided by OpenDNS.

Examining the Target Attack and Carding Sites Using Security Graph

Author avatar of Security Research TeamSecurity Research Team
Updated — October 15, 2020 • 3 minute read
View blog >

The OpenDNS Security Labs research team takes a closer look at the Target breach, using the OpenDNS Security Graph to explain the attack in detail.

Top Blogs

  • Umbrella Extends Protection to Unmanaged iOS and Android Devices September 13, 2022 2 minute read
  • New Security for a World Where Everyone and Everything Are Connecting August 30, 2022 3 minute read
  • Should You Use DNS Data to Drive Better Security Decisions? August 25, 2022 2 minute read

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