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Cas van Cooten (@chvancooten)

Hey πŸ‘‹! My name is Cas, I'm a Red Teamer based in the Netherlands. In my free time, I like to build offensive security tooling (OST), specifically in the Nim programming language. In the interest of transparency and to support the community in becoming better at offense and defense alike, I also like to publish my projects publicly as open-source software in a responsible manner (a much-debated point, I know).

Feel free to reach out if you have any questions about offensive development, red teaming, or other security topics! Always happy to chat.

Visit my website Follow me on Twitter Follow me on GitHub



Cas van Cooten's Projects

badblood icon badblood

BadBlood by @davidprowe, Secframe.com, fills a Microsoft Active Directory Domain with a structure and thousands of objects. The output of the tool is a domain similar to a domain in the real world. After BadBlood is ran on a domain, security analysts and engineers can practice using tools to gain an understanding and prescribe to securing Active Directory. Each time this tool runs, it produces different results. The domain, users, groups, computers and permissions are different. Every. Single. Time.

bugbountyscanner icon bugbountyscanner

A Bash script and Docker image for Bug Bounty reconnaissance. Intended for headless use.

cloudlabsad icon cloudlabsad

Terraform + Ansible deployment scripts for an Active Directory lab environment.

conferences icon conferences

A collection of presentations and other contributions I have made to conferences.

follina.py icon follina.py

POC to replicate the full 'Follina' Office RCE vulnerability for testing purposes

homeassistant-idasen-control icon homeassistant-idasen-control

A Flask webhook-like wrapper to integrate IDΓ…SEN desk control into Home Assistant. Based on Python component by Rhyst.

nimbuild icon nimbuild

A Docker container used to easily compile Nim binaries generated by my tools (NimPackt and NimPlant)

nimpackt-v1 icon nimpackt-v1

Nim-based assembly packer and shellcode loader for opsec & profit

nimplant icon nimplant

A light-weight first-stage C2 implant written in Nim.

osep-code-snippets icon osep-code-snippets

A repository with my notable code snippets for Offensive Security's PEN-300 (OSEP) course.

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