Author

Sigmund Brandstaetter CISSP, CCSP, CISM, OSCP, CEH

@osintph

articles: 12
total claps: 434
top claps: 132
avg read: 12.8 min
active: 2026-04-25 → 2026-06-17

Wiki topics

🔒 · Cybersecurity · 10 🔓 · Open Source · 2 🔧 · Data Engineering · 2 📰 · Journalism & News · 2 AGT · AI Agents · 1 📚 · Books & Reading · 1 MAC · Macroeconomics · 1 🚆 · Urban & Transport · 1

Top tags

#cybersecurity ·10 #osint ·8 #open-source-intelligence ·1 #self-hosting ·1 #searxng ·1 #censys ·1 #shodan ·1 #cybercrime ·1 #scam ·1 #philippines ·1

TCH MDA

SI Sigmund Brandstaetter CISSP, CCSP, CISM, OSCP, CEH · OSINT Team

The Top 8 OSINT Tools, Platforms, and Techniques Dominating the Investigative Landscape Today

A 2026 field guide to the platforms moving the needle for cyber analysts, journalists, and investigators, and why “open source” doesn’t…

May 17, 2026 · 13 min read · 132 claps #osint #cybersecurity #internet

The Top 8 OSINT Tools, Platforms, and Techniques Dominating the Investigative Landscape Today

SI Sigmund Brandstaetter CISSP, CCSP, CISM, OSCP, CEH

Why I’m Slowly Packing My Bags and Moving to hosting my own Blog

I’ve been writing on Medium for a while now. Tutorials, walkthroughs, case studies, the occasional rant about bad OPSEC. It’s been a decent…

Jun 02, 2026 · 5 min read · 104 claps

Why I’m Slowly Packing My Bags and Moving to hosting my own Blog

AI TCH

SI Sigmund Brandstaetter CISSP, CCSP, CISM, OSCP, CEH · OSINT Team

Operation Liwanag: The Same Map a Chinese Intelligence Asset Drew of Philippine Infrastructure…

On January 17, 2025, agents of the National Bureau of Investigation walked into a condominium unit in Makati and arrested a Chinese…

Jun 17, 2026 · 17 min read · 69 claps #osint #cybersecurity #censys

Operation Liwanag: The Same Map a Chinese Intelligence Asset Drew of Philippine Infrastructure…

TCH SCI

SI Sigmund Brandstaetter CISSP, CCSP, CISM, OSCP, CEH · OSINT Team

The Advanced Wireshark Guide (4.6.5) aka Episode 2

Because the proof is still in the packets, but now we’re going to read what they’re actually saying.

May 17, 2026 · 24 min read · 53 claps #wireshark #networking #cybersecurity

The Advanced Wireshark Guide (4.6.5) aka Episode 2

TCH MDA HUM

SI Sigmund Brandstaetter CISSP, CCSP, CISM, OSCP, CEH · OSINT Team

The Invisible Backbone of Modern OSINT: Why Residential Proxies Are Non-Negotiable for Serious…

An in-depth look at how residential IP infrastructure has quietly become the single most important OPSEC layer for threat intelligence…

May 23, 2026 · 17 min read · 36 claps #osint #cybersecurity #proxy

The Invisible Backbone of Modern OSINT: Why Residential Proxies Are Non-Negotiable for Serious…

TCH

SI Sigmund Brandstaetter CISSP, CCSP, CISM, OSCP, CEH · OSINT Team

Self-Hosting Changedetection.io for OSINT: Another one in the Why and How Series

In OSINT, what changes is often more telling than what’s there. A scam site quietly swapping its wallet address. A target’s bio losing a…

Jun 06, 2026 · 13 min read · 16 claps #osint #cybersecurity

Self-Hosting Changedetection.io for OSINT: Another one in the Why and How Series

MDA TCH

SI Sigmund Brandstaetter CISSP, CCSP, CISM, OSCP, CEH · OSINT Team

Certificate Transparency as a Timeline Source: Reading CT Logs Like a Forensic Notebook

Subscribe to my self hosted blog to get future posts that may not appear on medium anymore:

Jun 12, 2026 · 13 min read · 12 claps #osint #cybersecurity #python

Certificate Transparency as a Timeline Source: Reading CT Logs Like a Forensic Notebook

TCH

SI Sigmund Brandstaetter CISSP, CCSP, CISM, OSCP, CEH · OSINT Team

Self-Hosting SearXNG for OSINT: Why and How

First: Access this Article for free without membership requirement here:

Jun 05, 2026 · 15 min read · 10 claps #osint #cybersecurity #open-source-intelligence

Self-Hosting SearXNG for OSINT: Why and How

TCH

SI Sigmund Brandstaetter CISSP, CCSP, CISM, OSCP, CEH · OSINT Team

RDAP vs WHOIS for OSINT: Why You Should Already Be Using the Modern Protocol

First: Access this Article for free without membership requirement here:

Jun 10, 2026 · 7 min read · 1 claps #dns #osint #cybersecurity

RDAP vs WHOIS for OSINT: Why You Should Already Be Using the Modern Protocol

SI Sigmund Brandstaetter CISSP, CCSP, CISM, OSCP, CEH

I’m moving the blog (here’s where to find me)

Find me here

Jun 06, 2026 · 2 min read · 1 claps

I’m moving the blog (here’s where to find me)

TCH

SI Sigmund Brandstaetter CISSP, CCSP, CISM, OSCP, CEH

Ghosts of Ayala

How Chinese and Vietnamese cyber-fraud syndicates rebuilt the POGO economy inside Makati’s condominium towers, eighteen months after the…

May 24, 2026 · 18 min read · 0 claps #cybercrime #scam #cybersecurity

TCH ECO SOC

SI Sigmund Brandstaetter CISSP, CCSP, CISM, OSCP, CEH · OSINT Team

93 Minutes on npm: Inside the Bitwarden CLI Supply Chain Attack

On April 22, 2026, for about an hour and a half, if you ran npm install -g @bitwarden/cli, you got malware.

Apr 25, 2026 · 11 min read · 0 claps #npm #bitwarden #cybersecurity