Posts
7.15.21
New SonicWall Exploitation for SRA and SMA Devices
An explanation of the latest SonicWall exploitation. Learn how to detect attacks by inventorying and monitoring SRA and SMA devices, plus information about the SolarWinds Serv-U vulnerability.
Jeff Costlow
7.6.21
REvil Ransomware Attack and Supply Chain Risk
The latest REvil ransomware attack is a sophisticated supply chain-based attack on software provider Kaseya that has put up to 1,500 customers at risk.
Jeff Costlow
7.2.21
PrintNightmare Vulnerability: Detection, Explanation, and Mitigation
What you need to know about the latest PrintNightmare vulnerability (CVE-2021-34527), how it differs from other recent issues with the Print Spooler service, and what you can do to secure your organization.
Jeff Costlow
5.11.21
Patch Tuesday, May 11: Detecting Critical Vulnerabilities
Today was Microsoft Patch Tuesday, and while there were a relatively small number of patches issued—55 as compared to the usual 100 plus—a few of those vulnerabilities require immediate attention.
Jeff Costlow
4.21.21
Find SonicWall Vulnerabilities With an Inventory of Devices and Software
The SonicWall vulnerabilities are the latest in a spat of serious CVEs. Learn how to inventory your devices and software to prevent exploits.
Jeff Costlow
3.23.21
Ransomware, Exfiltration, and the Recent REvil Attacks
The recent ransomware attack on Acer evidences an increasing trend of combining ransomware and exfiltration for a two-pronged attack. Learn how ExtraHop Reveal(x) can detect and stop ransomware.
Jeff Costlow
3.12.21
Exchange Server Security Challenges Explained
How to secure Microsoft Exchange Server and why decryption is a critical capability for security solutions.
Jeff Costlow
3.3.21
The Recent Exchange Server Vulnerability and the Problem of SSRF Attacks
A new Exchange server vulnerability is being exploited to perpetrate active server side request forgery (SSRF) attacks.
Jeff Costlow
11.2.20
Security Alert: Ransomware Warning for Healthcare
A recent cybersecurity advisory issued by the Cybersecurity and Infrastructure Security Agency (CISA), the Federal Bureau of Investigation (FBI), and the Department of Health and Human Services (HHS) warns of an imminent cybercrime threat to hospitals.
Jeff Costlow
10.14.20
Security Alert: 'Bad Neighbor' Vulnerability Affects Windows 10 Systems
The Windows 10 vulnerabilities unveiled by Microsoft on October 13 include a remote DoS (CVE-2020-16899) and a remote code execution flaw (CVE-2020-16898) dubbed 'Bad Neighbor'. Get the rundown on potential exploits and what you should do.
Jeff Costlow
9.16.20
Security Alert: Detecting CVE-2020-1472 Zerologon Exploitation with NDR
The recent Zerologon vulnerability (CVE-2020-1472) could allow attackers to get control of a Windows domain without any user credentials. Learn how it works and how to protect against exploits.
Jeff Costlow
7.24.20
Ripple20: Finding Vulnerable Devices and Detecting Attacks
The Ripple20 group of vulnerabilities affects hundreds of millions of devices across many industries. Learn how to identify devices using the vulnerable Treck software and detect Ripple20 exploits.
Jeff Costlow
6.11.19
NSA's Advice on BlueKeep: Know Your Network
Reveal(x) Now Detects Evidence of BlueKeep (CVE-2019-0708)
Jeff Costlow
12.6.18
We Busted A Fake Chrome Extension That Was Trying to Steal Data
A mysterious (and fake) Chrome extension. A clever data exfiltration scheme. They would have gotten away with it, too, if it weren't for those meddling security analysts using ExtraHop Reveal(x)! Follow along as we go from threat detection to response in this real-life threat hunt with network traffic analysis.
Jeff Costlow
8.29.18
How to Detect Apache Struts 2 Exploit with ExtraHop (CVE-2018-11776)
There is a new Apache Struts vulnerability and it's a doozy. ExtraHop customers can use this technique to monitor for IOCs while they work to update their software.
Jeff Costlow
6.8.18
Detect & Stop This New Android Worm with ExtraHop
ExtraHop users, there's a nasty new Android worm that spreads via remote debugging services, but don't worry—install this remote ADP connections dashboard to quickly find and shut down at-risk devices.
Jeff Costlow
12.21.17
Your Windows Proxy Autodiscovery Could Be Compromised
How to defend against WPAD exploit aPAColypse now
Jeff Costlow
9.19.17
Visibility into TLS: Perfect Forward Secrecy
What is Perfect Forward Secrecy encryption and how ExtraHop allows you to decrypt Perfect Forward Secrecy in real time.
Jeff Costlow
8.28.17
BlackHat and Defcon: Highlights from a Week of Computer Security
For those of us in the computer security industry, the end of July in Las Vegas means the annual week of conferences; BlackHat and DefCon. It's always a great—albeit exhausting—week.
Jeff Costlow
6.27.17
Protect Your Organization from "Petya"
New ransomware campaign utilizes the EternalBlue exploit to infect systems across the globe.
Jeff Costlow
6.19.17
Takeaways from Securing a Cloud-Powered, SOC2-Certified Analytics Service
The public cloud is a natural place to perform machine learning and deep analytics, but your IT data is on-premises. What's needed to bridge the gap securely?
Jeff Costlow
5.17.17
WannaCry Ransomware Update
ExtraHop Bundle Now Directly Detects EternalBlue Portion of WannaCrypt.
Jeff Costlow
3.3.17
Gathering Steam: 2017 FIRST Robotics Challenge
If you have younger kids - especially if they are interested in STEM - take them to your local FIRST Robotics competition and encourage them to participate.
Jeff Costlow
3.1.17
RSA 2017 Recap: Always a Learning Experience
The RSA Conference is the largest security industry convention in the world. This year, ExtraHop had a booth there for the first time...and it was busy!
Jeff Costlow