By the time you read about a new threat, our platform has already written the detection for it
By Regan Packer, Technical Architect
No, really. Here’s how.
Every security team knows the gap. A new threat actor surfaces. A fresh CVE gets weaponized. And somewhere between that intelligence existing in the world and a working detection in your SIEM, days pass. Sometimes weeks.
That gap is where breaches live. At TekStream, we built something to close it.
Inside our Proactive Cyber Defense, powered by Cosmos, the platform runs an autonomous OSINT researcher. It reads the threat landscape the way your best analyst would, then does the thing your best analyst never has time for: it writes the detection code.
One of the things I find most interesting about this work is bringing OSINT and Deception Engineering into Detection Engineering. It provides an accelerated path from discovery to detection and remediation. In the breakneck speeds of modern AI-assisted vulnerability discovery, moving detection at speed to keep up is necessary.
I recently saw that speed firsthand. During a meeting reviewing the functionality of Poseidon Detection Engineering, we noticed the Mythos/Fable release appear in the Intel Feed. The Intel Feed continuously scans OSINT sources every five minutes for new information. In this case, it surfaced the release before many of the traditional news sources and browser feeds we typically rely on. It was a reminder that intelligence is only valuable if you can operationalize it.
Here’s what it does, every single day.
Reads everything.
Continuous OSINT ingestion from CISA’s Exploited Vulnerability Catalog, MITRE ATT&CK, threat intelligence feeds, malware repositories, and curated security news. Not quarterly. Daily.
Knows who’s behind the keyboard.
It maps activity against 174 tracked adversary groups, building enriched profiles including sponsorship, motivation, targeted industries, and favored techniques. Not just “suspicious,” but which crew, with confidence behind the attribution.
Thinks in kill chains.
It generates correlation logic that fires when one entity moves through multiple attack phases in 24 hours, the signature of a real intrusion rather than a noisy one-off.
Writes the detection.
This is the game changer. For every actor, technique, and indicator, it produces production-ready SIEM content in Splunk SPL and Microsoft Sentinel KQL, mapped to MITRE, entity-aware, and tuned for low false positives, with remediation included. Intelligence becomes enforceable defense automatically.
What excites me most about this work is coming to the screen each morning and seeing how the landscape changed in just the last 24 hours. Knowing that our deception environments have been actively tracking real attacks in real time, and that Detection Engineering is following OSINT for known APTs and developing detection packs for all of it, provides a thoroughly comprehensive view that would have taken hours to build previously.
Why does that matter?
Most security programs are reactive by design. They wait for the alert, then scramble. This flips the model. The moment a threat is understood anywhere in the open-source world, the detection to catch it is already being written for your environment.
And it compounds. Across our managed services fleet, a technique surfaced in one client’s environment hardens the defenses of every client, with strict per-customer isolation keeping each one private. Your defense gets smarter because of threats someone else faced first.
The adversaries are automating their reconnaissance, tooling, and speed. Defending at human speed against machine-speed attackers is a losing position.
TekStream’s Proactive Cyber Defense, powered by Cosmos, puts an OSINT-powered researcher on your side of that equation.
The headline breaks. The detection is already written.
That’s proactive security.
Curious how it fits your environment? Let’s talk.
About the Author
Regan Packer brings more than 30 years of full-stack cybersecurity experience, balancing business objectives with risk mitigation across enterprises, products, and solution and services providers. Having worked from corporate, vendor, and service provider perspectives, he has developed a unique understanding of how to align customer and user needs with enterprise objectives and regulatory requirements to enable secure, scalable growth.
He specializes in improving security maturity while maintaining affordability. Leveraging his CISSP and Microsoft certifications, Regan designs user-centric platforms and drives strategic initiatives that align security priorities with business goals. He is particularly passionate about applying AI to help organizations build innovative, scalable security frameworks.