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Kevin Breen

Senior Director Cyber Threat Research

Kev Breen currently serves as Senior Director of Cyber Threat Research at Immersive, where he helps organizations assess, build, and prove their Cyber Workforce Resilience. He is a renowned expert on new and emerging threats.
 

Prior to his time at Immersive, Breen spent 15 years in the military with the Royal Signals, starting as a radio technician repairing radio electronics and communications, before moving on to digital networks specialising as a malware analyst protecting UK MOD networks against cyber attacks. With over two decades of experience in IT and cybersecurity, Breen has learned the tradecraft for defensive, offensive, and deceptive cyber operations.

Breen has conducted extensive open-source research, including creating and releasing toolkits for network defenders, mainly for malware analysis and decryption, as well as writing the YARA rules, which are still recommended by VirusTotal. Breen’s open-source research gets a lot of attention, not only from the cybersecurity community, but also from the threat actors themselves.

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Cybersecurity
Aug 6, 2025

Cyber Threat Protection & Prevention

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Insider Threats: Definition, Types, and How to Tackle Them

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AI
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The Rise of Agentic AI: Is Your Cyber Team Ready?

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Cybersecurity
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Combat Modern Cyber Threats with a Modern Exercising Program

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Cyber Resilience
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4 Strategies for Building Resilience against Emerging Threats

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Cyber Resilience
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Strengthening cybersecurity teams’ capabilities: Cyber Workforce Benchmark 2022

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Patch Newsday – 13 July 2021

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Patch Newsday – 8 June 2021

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It makes you WannaCry: Anti-Ransomware Day 2021

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Patch Newsday: May 11, 2021

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Cybersecurity
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It’s not all CorrectHorseBatteryStaple: How to power up your passwords in 2021

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Patch Newsday: April 13, 2021

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Patch Newsday: March 10, 2021

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Patch Newsday: February 9, 2021

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Research
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Patch Tuesday December 2025 - Critical Microsoft Security Patches Released For Privilege Escalation and Remote Code Vulnerabilities

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Research
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Patch Tuesday October 2025 - Critical Vulnerabilities: Remote Code Execution, Privilege Escalation, Secure Boot Bypass, and VM Escape Patches

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Research
September 10, 2025

Patch Tuesday September 2025 - Critical Microsoft Security Patches Released for Privilege Escalation and Remote Code Vulnerabilities

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Thought Leadership
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Dispatches From the Desert: DEF CON Day Three

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Thought Leadership
August 10, 2025

Dispatches From the Desert: DEF CON Day Two

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Thought Leadership
August 9, 2025

Dispatches From the Desert: DEF CON Day One

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Thought Leadership
August 8, 2025

Dispatches From the Desert: Black Hat Day Two

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Thought Leadership
August 7, 2025

Dispatches From the Desert: Black Hat Day One

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Research
June 11, 2025

Patch Newsday June 2025 - Critical Microsoft Security Patches Released for Multiple Code Execution and Privilege Escalation Vulnerabilities

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Research
May 14, 2025

Patch Newsday May 2025 - Critical Microsoft Security Patches Released for Multiple Privilege Escalation and Code Execution Exploits

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How We Discovered Planet Technology Network Device Vulnerabilities

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Immersive Uncovers Critical Vulnerabilities in Planet Technology Network Devices

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Threat Intelligence
August 23, 2023

The Unforgotten: How Yesterday's Vulnerabilities Shape Today's Cyber Risks

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Research
April 13, 2022

Patch Newsday April – Pre-Easter Patches

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Research
February 9, 2022

Patch Newsday February 2022: Small But Mighty

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Research
January 28, 2022

SureMDM vulnerability could lead to supply chain compromise

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Research
December 17, 2021

Patch Newsday: Christmas Chaos or Silent Night?

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Research
December 13, 2021

Everything you need to know about Log4Shell (CVE-2021-44228)

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Research
November 10, 2021

Patch Newsday: Wild CVEs & CISA Directives

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Research
October 13, 2021

Patch Newsday: 12 October 2021 – Spooky Spooler and Sinister Scores

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Research
September 15, 2021

Patch Newsday: 14 September 2021 – Lousy Browsers and Arsey RCEs

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Research
August 10, 2021

Patch Newsday 10 August: Ironic exploitation and the spectre of PrintNightmare

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Research
July 19, 2021

Disclosure Dilemmas: Vulnerable Stalkerware

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Research
October 9, 2020

Research: Can you build spyware for a Fitbit?

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