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Cas van Cooten

@casvancooten.com

605 followers 122 following 61 posts

@chvancooten on the bird app 🐦 --- Benevolently malicious offensive security enthusiast || OffSec Developer & Malware Linguist || NimPlant & NimPackt author || @ABNAMRO Red Team

Posts Replies Media

Cas van Cooten @casvancooten.com · 25/04/2025

Not thinking about infosec for a while 🥰

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Cas van Cooten @casvancooten.com · 18/04/2025

BTW - I don't see this as a vulnerability. It is (clearly) by design, just something to be cautious with for all the vibe coders out there :) The @vscode.dev is doing an excellent job here - they even disable Copilot entirely in untrusted (restricted) workspaces.

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Cas van Cooten @casvancooten.com · 18/04/2025

quack.py needs work still

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Cas van Cooten @casvancooten.com · 18/04/2025

10/10 no notes, excellent blending in

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Cas van Cooten @casvancooten.com · 18/04/2025

Pretty fun proof of concept - VS Code's `copilot-instructions.md` allows for blatant backdooring of agents if any AI agents or edits are run from an untrusted repository. It can seemingly fulfil the user's request, but actually implement (and hide) some nefarious side activities 😂

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Cas van Cooten @casvancooten.com · 31/03/2025

Touched down in Singapore! Looking forward to Black Hat Asia. Hope to see many of you around!

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Cas van Cooten @casvancooten.com · 18/03/2025

This must be the most informative graphic contained in the Microsoft docs learn.microsoft.com/en-us/opensp...

A diagram describing the negotiate protocol, only saying 'negotiate protocol' twice between client and server

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Cas van Cooten @casvancooten.com · 08/03/2025

I was invited to present Nimplant at Black Hat Asia 2025 in Singapore this April! If you're around, please do reach out to talk offensive development, modern programming languages, or how to use (or detect) Nimplant in your ops. Looking forward to it! www.blackhat.com/asia-25/arse...

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Cas van Cooten @casvancooten.com · 02/12/2024

Lol 75% thought leader, must be because I interact with @xpnsec.com too much 😂 blueskyroast.com/roast/casvan...

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