Skip to content
View bytewreck's full-sized avatar
🐲
🐲
373 followers · 0 following

Achievements

Achievement: Starstruckx3Achievement: Quickdraw

Achievements

Achievement: Starstruckx3Achievement: Quickdraw

Organizations

@Crusaders-of-Rust

Block or report bytewreck

Block user

Prevent this user from interacting with your repositories and sending you notifications. Learn more about blocking users.

You must be logged in to block users.

Maximum 250 characters. Please don’t include any personal information such as legal names or email addresses. Markdown is supported. This note will only be visible to you.
Report abuse

Contact GitHub support about this user’s behavior. Learn more about reporting abuse.

Report abuse
bytewreck/README.md

Hi there 👋

My name is Valdemar, and I work as a security researcher on the research team at SpecterOps. I have a passion for dissecting software to understand its inner workings as well as an odd habit of optimizing proof-of-concept code for no apparent reason.

I have a background in cybersecurity consulting, with a focus on red teaming and adversary simulation. My experience includes breaking into and helping secure client environments, giving me a well-rounded perspective on offensive and defensive security.

Online presence

Feel free to reach out to me on Twitter or LinkedIn.

Jobs, education, certifications

See LinkedIn.

Published talks

2026

Date Conference/Venue Presentation
June 5th BSides Kristiansand Catching Credential Guard Off Guard
April 13th SO-CON Catching Credential Guard Off Guard

2024

Date Conference/Venue Presentation
November 8th BSides Copenhagen Compromising Entra ID (from the on-premises Active Directory in hybrid environments)

Stats

   

Pinned Loading

  1. DumpGuard DumpGuard Public

    Proof-of-Concept tool for extracting credential material from protected sessions on modern Windows systems.

    C 699 64

  2. GhostPack/Certify GhostPack/Certify Public

    Active Directory certificate abuse.

    C# 2k 274