Cisco Umbrella Blog

Cybersecurity Threats

Utilizing NLP To Detect APT in DNS

Jeremiah O'Connor
Updated — September 8, 2021 • 6 minute read
View blog >

This post describes how OpenDNS Labs proved the efficacy of a new NLP-based threat detection model using Carbanak, Dark Hotel, and other APT domains.

PayPal Phishing Sophistication Growing

Andrew Hay
Updated — October 15, 2020 • 5 minute read
View blog >

These attacks are not new, but they are beginning to look more legitimate with every iteration. Here are a couple of examples that we've recently observed.

How OpenDNS Labs Sees the BASH Vulnerability

Security Research Team
Updated — September 15, 2021 • 4 minute read
View blog >

There have been many blog posts, tweets, and even a few webinars talking about the massive patch-forcing BASH vulnerability. This is a different take.

SynoLocker: A New Ransomware Targeting Synology Devices

Security Research Team
Updated — March 5, 2020 • 1 minute read
View blog >

In this post, OpenDNS security researcher Frank Denis examines Synolocker, a new ransomware targeting Synology storage devices.

Gameover ZeuS Switches From P2P to DGA

Andrew Hay
Updated — March 5, 2020 • 2 minute read
View blog >

Additional analysis of the new GameOver Zeus switch in communication vectors is provided by OpenDNS Labs.

Attack Prediction: Malicious gTLD Squatting May Be The Next Big Threat

Security Research Team
Updated — March 11, 2020 • 5 minute read
View blog >

Security concerns and other risks around new gTLDs have been extensively discussed but no one really knows what the new gTLDs will bring.

Microsoft Office Zero-day Exploit

Security Research Team
Updated — March 5, 2020 • 3 minute read
View blog >

Security researcher Ping Yan takes a look at a zero-day exploit in Microsoft Office.

Discovery of New Malicious Domains Using Authoritative Name Server Traffic

Dhia Mahjoub
Updated — July 16, 2020 • 4 minute read
View blog >

Top Blogs