Company

ABOUT ESENTIRE

eSentire is The Authority in Managed Detection and Response Services, protecting the critical data and applications of 2000+ organizations in 80+ countries from known and unknown cyber threats. Founded in 2001, the company’s mission is to hunt, investigate and stop cyber threats before they become business disrupting events.

About Us Leadership Careers Event Calendar → Newsroom → Aston Villa Football Club →

EVENT CALENDAR

May

Seattle FutureCon

May

May TRU Intelligence Briefing

May

Pittsburgh FutureCon

Jun

June TRU Intelligence Briefing

Jun

Kansas City FutureCon

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LATEST PRESS RELEASE

Mar 19, 2026 eSentire Appoints Cybersecurity Industry Veteran James C. Foster as Chief Executive Officer Read More

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OUR PARTNERSHIPS

Aston Villa Football Club

AVFC takes its cyber protection to the Next Level with eSentire as its official cybersecurity partner.

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Partners

PARTNER PROGRAM

We provide sophisticated cybersecurity solutions for Managed Security Service Providers (MSSPs), Managed Service Providers (MSPs), and Value-Added Resellers (VARs). Find out why you should partner with eSentire, the Authority in Managed Detection and Response, today.

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Apply to become an e3 ecosystem partner with eSentire today.

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Reclaim the Advantage Over Sophisticated Cybercriminals with Expert Threat Response

Modern threat response requires the ability to collect unstructured data from disparate sources associated with attacker tactics, techniques, and procedures (TTPs) and operationalize global protections – all in a timely manner.

Unfortunately, many in-house security teams don’t have the bandwidth or expertise to perform proactive threat hunting, conduct original threat research, and develop or deploy new threat detection rules.

The eSentire Threat Response Unit (TRU) is an industry-leading threat research team committed to helping your organization become more resilient. This is an elite team of threat hunters and researchers that supports our 24/7 Security Operations Centers (SOCs), builds threat detection models across the Atlas Platform, and works as an extension of your security team to continuously improve our Managed Detection and Response service.

By providing complete visibility across your attack surface and performing global threat sweeps and proactive hypothesis-driven threat hunts augmented by original threat research, we are laser-focused on defending your organization against known and unknown threats.

We prioritize creating and updating our detection rules and machine learning (ML) models regularly, so your security posture is hardened against the evolving threat landscape. Our content development is built upon the MITRE ATT&CK Framework® and is constantly fine-tuned for efficacy to reduce false positives.

Why Choose eSentire's Threat Response Unit (TRU)

TRU acts as an extension of your security team to build your cyber resilience and prevent business disruption. With TRU by your side, you can rest easy knowing that you’re protected by an MDR provider that law enforcement agencies rely on to identify threat actors and collaborate on threat intelligence.

Prepare and react to emerging, unknown cyber threats to prevent business disruption

TRU continuously monitors the threat landscape, publishes regular threat advisories, security bulletins, and threat intelligence reports, and conducts proactive real-time threat hunts so you can stay ahead of the latest emerging threats and prevent business disruption. Threat advisories and daily briefings are available in the Atlas Operations Center, so you always have access to the latest threat intelligence.

Harden your toolkit with novel threat detection rules and advanced ML models

As a foundational component of the eSentire MDR service, TRU constantly builds and updates new threat detection rules and ML models across the Atlas Platform. These detections are further strengthened by robust investigative runbooks to support our SOC Cyber Analysts in their investigation and containment actions – on your behalf.

Go into battle with a team of industry veterans with real-world experience

TRU has discovered dangerous cyber threats and nation-state attacks (e.g., the Kaseya MSP breach and identities of hackers behind the more_eggs malware). With a 95% employee retention rate, TRU consists of highly certified, seasoned industry veterans who regularly hold threat briefings, share their expertise with industry publications, and have proven to be trusted sources for global law enforcement agencies.

WE OWN THE R IN MDR

See eSentire in Action

An effective defensive posture requires process, technology and most importantly human expertise for combat-level containment and response. You can’t battle these types of cyberattacks alone. Learn how eSentire MDR responded to emerging threats, including zero-day and ransomware attacks, with a balance of automated platform disruptions and hands-on expertise for investigation & manual cyber threat containment.

ZERO-DAY ATTACK

A Review of the Zero-Day Attacks Impacting the Kaseya VSA Platform

Watch this video with one of eSentire’s Elite Threat Hunters, Spence Hutchinson, as he reviews the Kaseya VSA supply chain attacks and how eSentire’s Security Operations Center (SOC) & Threat Response Unit (TRU) were able to quickly respond on our customer’s behalf and notify Kaseya of the breaches.

WATCH NOW →

RANSOMWARE ATTACK

Malicious BestCrypt Detection Uncovers Full Blown Ransomware Attack at 3am

Watch this video to see how a Fortinet vulnerability led to a ransomware attack impacting 250 endpoints in a customer’s environment. Original detection engineering developed by TRU identified the malicious use of BestCrypt and our 24/7 SOC Cyber Analysts immediately contained the attack and reversed the encryption.

WATCH NOW →

Notable Threat Detections

WE STOP THREAT ACTORS IN THEIR TRACKS.
OTHERS CLAIM IT, WE PROVE IT.

Our Threat Response Unit (TRU) collects and processes threat intelligence from 54 commercial threat feeds and 10+ proprietary intel sources, the Dark Web, social media, security reports, positive SOC-driven threat investigations, and various third-party tools to conduct further investigations and identify potential Indicators of Compromise (IOCs).

Once a threat is discovered, eSentire TRU publishes regular threat advisories, security bulletins, and threat intelligence reports, and conducts proactive real-time threat hunts so you can stay ahead of the latest emerging threats and prevent business disruption. Security Advisories and Daily Threat Briefings are available in the Atlas Operations Center in real-time.

eSentire TRU has discovered some of the most dangerous cyber threats and nation-state attacks in our space. Last year, TRU built 500+ new detectors to protect our customers and circulated 35 Security Advisories. We broke the news on the Kaseya MSP breach, the malicious more_eggs malware and more.

35%

Of threats are identified by TRU before they appear on commercial threat feeds.

12%

Of threats identified by TRU are never seen in the commercial feeds we manage.

Original nation-state attacks and threats discovered by eSentire TRU:

1. The Kaseya Crypto-mining Attack

2. Hackers Spearphish Professionals on LinkedIn with Fake Job Offers, Infecting them with more_eggs Malware

3. Malicious Google Ads to Lure Computer Users to Spoofed "Signal" and "Telegram" Websites

4. Hackers Flood the Web with 100,000+ Malicious Pages to Deliver Malware

5. Gootloader Hackers Poison Websites Globally to Infect Business Professionals with Ransomware

Original Research and Publications

The TRU team publishes reports, industry publications and white papers based on its original research and the insights driven through proactive threat hunts.

2025 Year in Review, 2026 Threat Landscape Outlook Report

The Industrialization of Cybercrime: Identities are Under Attack

Learn why user identities are under attack, with account compromise representing 50% of cases investigated in 2025 (a 389% increase over 2024), and discover how to protect your organization.

DOWNLOAD THE REPORT

Review more of our detailed Threat Dissections from the Threat Response Unit:

Threat Dissection: Emotet

Threat Dissection: Trickbot

Threat Dissection: Suspicious Remote Access

Endpoint Threat Dissection: Anatomy of a PowerShell Attack

EXPLORE RESOURCES IN OUR TRU INTELLIGENCE CENTER →

Read the Latest Security Advisories and TRU Positives

eSentire TRU regularly publishes Security Advisories, TRU Positives, and Malware Analyses on emerging cyber threats to arm you with the latest intel so you can make informed decisions that evolve with the threat landscape. TRU’s research routinely supports law enforcement agencies in their mission to unmask threat actors and stop cybercrime.

LATEST POST – May 06, 2026

Palo Alto PAN-OS Zero-Day Vulnerability (CVE-2026-0300)

THE THREATOn May 5th, 2026, Palo Alto Networks disclosed CVE-2026-0300 (CVSS: 9.3), a critical zero-day buffer overflow vulnerability that impacts the User-ID Authentication Portal (aka Captive Portal) service of PAN-OS software. Exploitation of the vulnerability can enable an unauthenticated attacker to perform Remote Code Execution (RCE) with root privileges on impacted PA-series and VM-series firewalls, leading to full device takeover.Patches to address CVE-2026-0300 are…

READ NOW →

Apr 30, 2026

CVE-2026-41940 – cPanel & WHM Authentication Bypass Vulnerability

READ NOW →

Apr 29, 2026

Increase in Email Bombing and IT Impersonation Campaigns

READ NOW →

Apr 16, 2026

Nginx-ui Authentication Bypass Vulnerability CVE-2026-33032 Exploited

READ NOW →

Cyber Threat Hunting Done Right

Adversaries don’t work 9-5 and neither do we.

By leveraging contextualized human-driven threat intelligence, original content on emerging cyber threats, 24/7 availability of Elite Threat Hunters, and advanced analytics based on the latest TTPs, TRU is committed to delivering the strongest MDR offering from eSentire.

eSentire TRU is foundational to our MDR service – no add-ons or additional costs required. You benefit from:

Curated Threat Intelligence
Threat Hunting
Mitigation Support for Zero-Day Threats
Original Threat Research
Proactive and Reactive Threat Sweeps
Live Defense Against Attackers
Updated Detection Rules
Monthly TRU Intelligence Briefings
Security Advisories and Daily Threat Briefings available in the Atlas Operations Center

Security Leaders Count on eSentire to Prevent Business Disruption

Charles C.

Security Architect

Mid-Market Company

READ THE FULL REVIEW →

There are so many things I like but the best is the complete ecosystem we've built with them for 24x7x365 coverage. We are utilizing Network, Endpoint, Log, Vulnerability Management, Incident Response and Forensics. Oh, also love the quarterly cadence calls to sync up with them about issues, questions or improvements.

Phil M.

Information Security Architect

Mid-market Legal Services Company

READ THE FULL REVIEW →

eSentire has an incredibly broad range of platforms that can be used individually or in tandem to protect your infrastructure and your users the way you want them protected. Their network interceptor product and MDR products are top products in the industry. Once installed, the product is absolutely transparent to your users.

David M.

Director of Information Technology

Mid-Market Company

READ THE FULL REVIEW →

They have a high skilled technical team and great communication to keep you in the loop. They are very detailed oriented and follow up with any / all requests. They keep us updated with their future plans and prevent us from falling behind!

Thomas K.

IT Manager

Mid-Market Company

READ THE FULL REVIEW →

We've been using eSentire for over 5 years. Our experience with them has been great from the very beginning. Implementation is very easy and they are with you every step of the way. They have excellent customer support. Our dedicated customer success manager is always available to help, quick to respond, and loops in other experts when needed to provide expert security guidance. They go above and beyond to make sure we are well-supported, no matter the complexity of the issue. Their threat intelligence briefings and papers are also very helpful. They proactively warn us of current and emerging cyber threats and perform proactive threat hunts which helps us stay a step ahead of potential risks. Overall, eSentire has proven to be a reliable security partner. The ability to send in multiple signals (endpoing, log, network, vulnerability, identity, etc.) truly set them apart.

Verified Customer

Industrial Automation Enterprise Company

READ THE FULL REVIEW →

THREAT RESPONSE UNIT

Prevent the Most Advanced Cyberattacks from Ever Breaking Through

Jump To

Reclaim the Advantage Over Sophisticated Cybercriminals with Expert Threat Response

Modern threat response requires the ability to collect unstructured data from disparate sources associated with attacker tactics, techniques, and procedures (TTPs) and operationalize global protections – all in a timely manner.

Why Choose eSentire's Threat Response Unit (TRU)

Prepare and react to emerging, unknown cyber threats to prevent business disruption

Harden your toolkit with novel threat detection rules and advanced ML models

Go into battle with a team of industry veterans with real-world experience

Advanced Threat Intelligence That Outpaces Cyberattacks

ALL-IN-ONE ESENTIRE MDR

ESENTIRE THREAT INTELLIGENCE

TRU INTELLIGENCE CENTER

MONTHLY THREAT INTELLIGENCE BRIEFINGS

WE OWN THE R IN MDR

See eSentire in Action

ZERO-DAY ATTACK

A Review of the Zero-Day Attacks Impacting the Kaseya VSA Platform

RANSOMWARE ATTACK

Malicious BestCrypt Detection Uncovers Full Blown Ransomware Attack at 3am

Notable Threat Detections

WE STOP THREAT ACTORS IN THEIR TRACKS.OTHERS CLAIM IT, WE PROVE IT.

35%

12%

Original nation-state attacks and threats discovered by eSentire TRU:

WEBINAR

From Defense to Offense: Leveraging Threat Intelligence & Dark Web Monitoring for Enhanced Security

Original Research and Publications

2025 Year in Review, 2026 Threat Landscape Outlook Report

The Industrialization of Cybercrime: Identities are Under Attack

Review more of our detailed Threat Dissections from the Threat Response Unit:

Threat Dissection: Emotet

Threat Dissection: Trickbot

Threat Dissection: Suspicious Remote Access

Endpoint Threat Dissection: Anatomy of a PowerShell Attack

Read the Latest Security Advisories and TRU Positives

LATEST POST – May 06, 2026

Palo Alto PAN-OS Zero-Day Vulnerability (CVE-2026-0300)

Apr 30, 2026

CVE-2026-41940 – cPanel & WHM Authentication Bypass Vulnerability

Apr 29, 2026

Increase in Email Bombing and IT Impersonation Campaigns

Apr 16, 2026

Nginx-ui Authentication Bypass Vulnerability CVE-2026-33032 Exploited

TRU Positives

Read the latest from ourTRU Team.

Cyber Threat Hunting Done Right

eSentire TRU is foundational to our MDR service – no add-ons or additional costs required. You benefit from:

Security Leaders Count on eSentire to Prevent Business Disruption

Charles C.

Security Architect

Mid-Market Company

Phil M.

Information Security Architect

Mid-market Legal Services Company

David M.

Director of Information Technology

Mid-Market Company

Thomas K.

IT Manager

Mid-Market Company

Verified Customer

Industrial Automation Enterprise Company

Learn How Our Threat Response Solutions Safeguard Your Business

Ready to start building a more resilient security operation today?

WE STOP THREAT ACTORS IN THEIR TRACKS.
OTHERS CLAIM IT, WE PROVE IT.

Read the latest from our
TRU Team.