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Phishing Campaign Identified: How OSINT Exposed a Real Calendly Link in a Fake Bloomberg Interview invite trough a x.com DM
A targeted phishing campaign used a fake Bloomberg persona, a real Calendly link and a convincing X OAuth flow to pursue people in AI and OSINT. This investigation follows the chain from social engineering to a fake “Twitta” login page, maps the public targeting pattern, and shows how to verify an interview request before it costs you an account.

Nico Dekens | dutch_osintguy
Oct 510 min read


When the Source Attacks Back: Prompt Injection Is Coming for OSINT
AI can help investigators move faster. It can also be manipulated by the sources it reads. This practical guide shows how prompt injection enters OSINT workflows, how to detect hidden instructions in webpages, PDFs and spreadsheets, and how to preserve, test and report the evidence. Includes a hands-on CTF lab with three realistic files to investigate.

Nico Dekens | dutch_osintguy
Aug 3122 min read


OSINT is Still a Thinking Game
I’ve been thinking a lot about why conversations around OSINT feel increasingly shallow, even though the tools we use have never been more powerful. We have more data, automation, dashboards and AI-generated summaries than at any point in the history of intelligence. And yet, when I look at how conclusions are drawn, how confidence is expressed, and how often assumptions go unchallenged, I can’t escape a deeply uncomfortable feeling: We are collecting more than ever and thin

Nico Dekens | dutch_osintguy
Feb 37 min read


OSINT - Cities with hundreds of names | How OSINT investigators miss hidden clues
You think you know Amsterdam? You don’t. Even if you’re born and raised there. For OSINT investigators, analysts, and journalists, searching only for “Amsterdam” means missing half the signal. The city hides behind slang, symbols, codes, and multilingual aliases. This post shows how language masks location, why alias awareness matters, and how Boolean and regex uncover Amsterdam’s hidden digital footprint across the open web, social media, and the dark web.

Nico Dekens | dutch_osintguy
Jan 210 min read


What OSINT Really Is - And Why AI Keeps Getting It Wrong
OSINT isn’t about collecting public data, AI already does that better than humans. OSINT is about pressure-testing reality. In digital investigations, organisational security, and business risk, OSINT turns fragmented public signals into defensible understanding. As AI increases visibility but not judgment, OSINT remains a human discipline: questioning sources, timelines, intent, and absence. This article breaks down what OSINT really is, how it’s used, why businesses rely on

Nico Dekens | dutch_osintguy
Dec 22, 20254 min read
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