Ringzer0 COUNTERMEASURE

A Premier International Cybersecurity Conference // Ottawa // November 3-7

SCHEDULE

Ringzer0 COUNTERMEASURE

Ringzer0 Countermeasure is a leading international cybersecurity conference held in Ottawa, Canada - a travel-friendly, globally connected capital city.

Organized by Ringzer0, the event bridges the gap between the private sector and public institutions by bringing together world-class researchers, government agencies, law enforcement, and academic experts to tackle today's most complex cybersecurity challenges.

While content spans a broad spectrum of technical and strategic topics, Countermeasure places particular focus on the evolving threats and priorities facing governments and critical infrastructure around the world.

The event features a blend of virtual and in-person training, ending with a focused, one-day conference. It is a unique platform for professional development, knowledge sharing, and meaningful networking within the global cyber security community.

SCHEDULE

Friday, November 7, 2025, Ottawa Conference and Event Centre

Speakers, Talks and Workshops

KEYNOTE // Perri Adams, Former Special Assistant to the Director, DARPA

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Three Buddy Problem: LIVE // Costin Raiu, Ryan Naraine, Juan Andrés Guerrero-Saade

A special live recording of The Three Buddy Problem podcast, where three industry veterans tackle the complex, the controversial, and the downright weird corners of infosec. Sharp insights, unfiltered takes, current threats, hacker culture, and what’s next for the security world.

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TALK: Best of the Worst: Misadventures in Bug Disclosure // Dustin Childs

A behind-the-scenes look at the wild, frustrating, and comical world of bug disclosures. From face-palm moments to vendor mishaps, this talk shares lessons, farces, and advice to improve how bugs are found, reported, and fixed.

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TALK: Buttercup and DARPA’s AI Cyber Challenge // Henrik Brodin, Ronald Eytchison

Trail of Bits’ Buttercup won $3M in DARPA’s AI Cyber Challenge, autonomously finding and patching 28 vulnerabilities. We’ll demo its open-source multi-agent system using static analysis and AI fuzzing, and share lessons on scaling AI-driven security.

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TALK: Dr SharePoint: How I Learned to Stop Worrying and Love the Vuln

On July 19th 2025, Microsoft published two new critical 9.8 CVSS score CVEs covering vulnerabilities in on-prem versions of SharePoint. Follow along as we pull on the thread and unravel a far-ranging campaign including over 40 custom malware samples never before described in public.

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TALK: CLFS Uncontained: Exploiting CLFS Without Touching the Log // Marco Ortisi, Ben Dumas

CVE-2025-29824 is a use-after-free in Windows CLFS that doesn’t require tampering with CLFS containers. We discuss the root cause, reliable triggers, how it leads to kernel-level privilege escalation, detection strategies and potential forensic artefacts to monitor in real-world environments.

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TALK: Behind the Kernel: 0days in Drivers and Windows Signed Exposed // Iván Cabrera, Adrián Díaz

In this talk, we reveal how we discovered over 30 exploitable Microsoft-signed Windows drivers, even on fully patched systems. We detail our reversing method and a flaw in the driver signing process that lets attackers create undetectable, validly signed driver variants.

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WORKSHOP: Supercharging Ghidra: Build Your Own Private Local LLM RE Stack with GhidraMCP, Ollama, and OpenWebUI // John McIntosh

Learn to build a private, modular RE stack with GhidraMCP, pyghidra-mcp, Ollama & OpenWebUI. This workshop shows how to set up local LLMs, integrate with Ghidra, and customize workflows—enabling offline, privacy-first analysis of malware, firmware & binaries.

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WORKSHOP: Reversing a (not-so-) Simple Rust Loader // Cindy Xiao

Rust can be challenging for even experienced reverse engineers. We will reverse a simple Rust malware loader found in the wild with obfuscated strings and a decoy payload, making it a good example for learning Rust reversing concepts like threads, dynamic dispatch, and type recovery.

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In-Person Training (November 3-6)

Ringzer0 COUNTERMEASURE In-Person Training

Countermeasure’s in-person training delivers hands-on courses to match your experience and goals. Led by world-class instructors from the private sector, academia, and beyond, our training covers a wide spectrum of topics in both offensive and defensive security. Nov 3-6.

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Virtual Training (October 26 - November 1)

Ringzer0 COUNTERMEASURE Virtual Training

Can’t make it to Ottawa? No problem. With Ringzer0 Countermeasure’s Virtual Training, you can learn from top-tier instructors from the comfort of your own home. Oct 26 - Nov 1

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Our Advisory Board

COUNTERMEASURE25 Advisory Board Members

COUNTERMEASURE25 Advisory Board Members

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The Venue

Ringzer0 COUNTERMEASURE25 Venue and Hotel

Venue: Ottawa Conference and Event Center Hotel: Courtyard by Marriott Ottawa East Book at discounted conference rates Address: 200 Coventry Road. Ottawa, ON K1K 4S3 Canada

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Tickets

See Also