stefan@stl-tec:~$ whoami

Security by default

Notes on security, engineering, life, the universe and everything (in that order). See Articles for "blog entries", tutorials for multi-part deep dives, and projects for the tools built along the way.

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Articles

0x00
Security by design

My attempt at a definition

SECURITY

2026-08-22

0x01
Dokuwiki is great

Ode to dokuwiki

WIKI IT

2026-04-05

0x02
Android Penetration Testing

Setting up an assessment environment and working through common weaknesses in Android applications.

MOBILE

2025-11-19

0x03
1001 Used of netcat

When your target's netcat doesn't ship the -e flag, your reverse shell doesn't have to die. A few other tricks worth knowing too.

NETWORKING SECURITY

2022-01-01

0x04
C Vulnerability Walkthroughs

Show off your understanding of C by mastering some non-trivial exploits, one walkthrough at a time.

C EXPLOIT

2022-01-01

0x05
Middleman vs Hugo vs Grav vs all the Rest

Why this site moved off a heavier CMS and onto Middleman - and what that trade-off actually bought.

META

2021-01-01

Tutorial series

2 PARTS

Basic Windows Exploitation

Applying the reverse engineering tutorials to do basic Windows exploitation, using virtual machines and the HEVD.

Start the series →

13 PARTS

Reverse Enineering Windows (10)

It's not all that difficult, really - a from-scratch walk through disassembling and understanding Windows binaries.

Start the series →

Projects

BUILT WITH D3.JS

Dynamic Cybersecurity Domain Map

An explorable map connecting the fields, tools, and techniques that make up the security landscape.

View the project →