OSINT Every Day Update

1. Strategy & Governance
Focus: Direction, Feedback, Ethics
– Core Definition and Purpose:
– Open-Source Intelligence (OSINT) is defined as an outcome, distinct from merely the collection of data or reliance on tools.
– Adopting this perspective helps mitigate “collection fatigue.”
– Ethical Dilemma: AI Prompt Monitoring
– Entities like Meta are utilizing user prompts provided to Artificial Intelligence (AI) systems for targeted advertisement purposes.
– This development reinforces the operational principle that users of “free” LLM services are frequently the product, regardless of monthly subscription options.
– OPSEC Review: Isolated Environments
– To ensure secure, isolated environments for investigative work, commercial platforms provide key features for operational security:
– Persistent virtual desktops and phones.
– Real carrier-based SMS delivery for reliable One-Time Passcodes (OTPs).
– Residential IP connectivity, selectable from hundreds of global locations, for controlled geolocation.
– Structured Analysis Case Study:
– A report on “OSINTing the OSINTers” demonstrated that structured analysis techniques are more valuable than purely tradecraft-heavy methods for complex investigations.

2. Collection Modalities Deep Dive
Focus: Collection
– Dorking Drill: Basic Operators
– Effective OSINT requires leveraging fundamental Google search operators, specifically:
– site:
– filetype:
– Email OSINT Collection Overview
– Email Lookup (Discovery): Starts with data points such as a name, company, or domain to discover an associated email address.
– Reverse Email Lookup: Starts with an existing email address to investigate the owner, associated accounts, and breach history. The key difference is the direction of the search.
– Reverse Email Search Techniques
– Run the target email through an OSINT platform to generate an aggregated report including breach hits, WHOIS records, linked social accounts, and affiliated domains.
– Utilize Google dorking as a backup, employing exact-match searches (e.g., “[email@domain.com]”) and site: operators.
– Check breaches and leaks, prioritizing aggregated checks to comply with regional data protection regulations (e.g., GDPR, CCPA).
– Manual Email Extraction Methods
– Extract the username stem (the portion before the @) and treat it as a potential reusable handle across platforms.
– Run username searches on the stem using OSINT tools or Google dorks to pivot to other leads.
– Test alternate providers (e.g., @gmail.com, @yahoo.com) by combining the username stem with different domain suffixes.
– Tool Overviews
– Vehicle AI (Web Application)
– Purpose: Designed to identify a vehicle’s make, model, and approximate range of years from an image.
– Note: The tool currently processes external views effectively but throws an error when analyzing images focused on vehicle interiors.
– DocuFinderJS (GitHub)
– Purpose: Scans specified target domains to uncover publicly accessible documents, such as PDFs and spreadsheets.
– Value: Primarily used for identifying the exposure of sensitive data via document leakage (Document OSINT).
– OSINT Bookmarklets (GitHub)
– Overview: A collection of OSINT utilities provided as browser bookmarklets.
– Key Highlight: The Facebook Marketplace User tool is noted as a particularly valuable utility within the collection.

3. Verification & Integrity Report
Focus: Processing, Analysis
– Email Validation Strategies
Validation prevents time expenditure on dead leads and requires different technical checks:
– Syntax Check: Confirms the address matches the valid “name@domain.com” structure.
– Mail Exchange (MX) Lookup: Essential verification that the domain exists and directs email to a mail server.
– SMTP/TCP Handshake: A deep check that can show whether the mailbox is accepted. Automated probing should be performed responsibly to avoid triggering abuse filters.
– Confirmation Email: The definitive method, although inherently risky as it alerts the target to the investigation if a response is received.
– Safety Guidance for Breach Data
– When checking breaches and leaks, use aggregated checks provided by professional OSINT tools.
– Investigators must avoid poking around in raw leaks to maintain compliance with regulations such as GDPR and CCPA.

4. Applied Intelligence Briefing
Focus: Dissemination, Analysis
– CTI Roundup: Discovering and Tracking Data Breaches and Leaks
Guidance focuses on proactive monitoring and data management:
– Establish methods to identify data leaks and breaches as they occur.
– Utilize search engines, APIs, and specialized services to access compromised information rapidly while it is still available.
– Implement ongoing monitoring to track the subsequent distribution of compromised data across forums, GitHub, and Telegram after the initial leak.
– Investigative Example: Email Search in Action
A case study demonstrated the sequential application of email OSINT:
– Step 1 (Reverse Search): An email address associated with an artist (g.bush.art@bushcreative.co) returned an old breach record listing the username ‘gbush.art’ and a public Strava account.
– Step 2 (Validation): MX lookup confirmed the domain (bushcreative.co) was live, and SMTP probing showed the address accepted mail.
– Step 3 (Username Extraction): Searching the extracted username stem (gbush.art) led to a DeviantArt profile matching the branding, confirming the creator’s identity.

5. The OSINT Frontier & Dev
Focus: Feedback, Direction
– Subscription and Training Updates
– Premium Subscription: A 7-day free trial is available for the premium subscription. The entire archive of previous premium posts is accessible to paid subscribers.
– Law Enforcement Eligibility: Members of law enforcement are eligible for a complimentary premium subscription upon request via their official email address.
– Publishing Schedule Adjustment:
– There will be no paid newsletter issue on December 4, 2025, due to the upcoming holidays.
– The final paid issue for 2025 is scheduled for publication on December 18, 2025.