Sjoerd de Jong

Sales Engineer at SentinelOne. Views and Opinions are my own.

[SentinelOne @SentinelOne]

Frontier AI isn't being built in isolation. Neither is the frontier of cyber defense. That’s why we’re proud to be a partner in @OpenAI's Trusted Access for Cyber (TAC) Program.

From Gregor Stewart, our Chief AI Officer:

“At SentinelOne, the real value of AI is how quickly it helps us turn signals into an actionable advantage for defenders. GPT-5.5 helps analysts connect telemetry, focus on what matters, and strengthen how organizations investigate, detect, and respond to emerging threats.”

Read more: https://t.co/rVvMKekXH6

[SentinelOne @SentinelOne]

Legacy security has spent decades cataloging evil. The CPU-Z supply chain attack shows exactly where that model hits its ceiling — by exploiting your trust.

Threat actors compromised the official CPUID domain, repackaged a legitimate signed binary, and let Windows do the rest: a Zig-compiled DLL hijacking the OS loader, reflective injection into memory, DNS-over-HTTPS masking the C2 call home.

A trusted download doing exactly what the attackers designed it to do.

SentinelOne's agent caught it by reading the behavior—anomalous API resolution, RWX memory allocation, process injection patterns—and autonomously terminating and quarantining the threat before the backdoor could phone home.

No ticket needed. No damage done.

🔗 Full technical breakdown: https://t.co/8WcB2BC68r

[Itamar Golan 🤓 @ItakGol]

🦀🦀 Introducing ClawSec 🦀🦀

My amazing team at Prompt Security moved fast and is already shipping - today we are releasing a security package for OpenClaw Agents.

It detects drift across all built-in skills, runs security audits, verifies skill integrity, and provides automatically updated alerts and recommendations (including CVEs).

Open source - feel free to take a look 👀

[🔗Links below]

We would love a star on GitHub if you like it, and some love on Product Hunt 💜

[Sjoerd de Jong @sdjong]

@Rabobank @kevertje77 Dit is een browser issue. Geen pagina issue. Bekend ‘probleem’ in chromium browsers. Voorbeeld van een andere partij: https://t.co/LEB92rRbXi

[Sjoerd de Jong @sdjong]

@UID_ Sleep? On a 3 hour flight? Dozing off a bit, at max

[Sjoerd de Jong @sdjong]

@JackRhysider @HackingLZ Netsend *

[Sjoerd de Jong @sdjong]

@RicoB06266414 @BM_Visser @AutoriteitCM Serieuze vraag: wat vinden verzekeringsmaatschappijen hier van? Wordt dat ok gevonden?

[SentinelOne @SentinelOne]

A Leader and Trusted AI Partner 🤝

We are proud to be named a Leader in the 2025 Gartner® Magic Quadrant™ for Endpoint Protection Platforms for the fifth consecutive year. Thank you to our customers, partners and Sentinels—together we are reimagining cybersecurity in the AI era.

🔗 Learn more here: https://t.co/hq7UdKamSm

[Sjoerd de Jong @sdjong]

@UID_ Hebben ze je in de politieauto gebracht?

[Sjoerd de Jong @sdjong]

@UID_ Dik!

[Sjoerd de Jong @sdjong]

@UID_ Grammarly ftw!

[Sjoerd de Jong @sdjong]

@richardtkiewiet https://t.co/ad0CNcrvLv

[Sjoerd de Jong @sdjong]

@ucokniges Since when do we call garden work or maintenance ‘restoration’? It’s not like it is a painting being restored or something 😂

[Nelis 🇳🇱🇦🇹 @NielsHonkoop]

America did not build New York. The Netherlands did.

America did not pay for New York. The Netherlands did.

America did not bring thousands of settlers to live in New York. The Netherlands did.

It is perfectly fair for the Netherlands to be raising questions about New York.

🇳🇱🇳🇱🇳🇱

[Sjoerd de Jong @sdjong]

@MariskaKolk Je bent de enige

[uid.eth | Rickey Gevers ⛵️ @UID_]

Opschalen!!

[Sjoerd de Jong @sdjong]

@UID_ This looks like torx? Or do you mean the green one?

[Sjoerd de Jong @sdjong]

@Rodriramosdb Dit zijn gewoon mensen hun telefoons en horloges. Deze app kan geen driehoeksmeting doen, dus doen alsof deze bluetooth devices zich ook echt voor deze telefoon bevinden slaat werkelijk nergens op.

[Sjoerd de Jong @sdjong]

@UID_ Oude tweet?

[SentinelOne @SentinelOne]

🇨🇳 📷 "If it were not an election year in the United States, we would be talking about nothing but China," said SentinelOne's @C_C_Krebs at #OneCon 2024, the premier cybersecurity event of the year. "That's the issue that every executive needs to be laser focused on because I can tell you in my conversations with U.S. government officials and some of our allies, this is the number one concern they have, particularly with cyber."

📺 To learn more, watch the full video below.

#OneCon24