PRISM, Kronikier & GitLeak: 3 OSINT Tools That Expose Digital Footprints Better Than Sherlock + Video

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Introduction:

Open-Source Intelligence (OSINT) has evolved far beyond simple Google searches and basic username lookups. Modern OSINT investigations require specialised tools that can mine historical web data, correlate identities across platforms, and extract metadata that subjects never intended to expose. This article breaks down three cutting-edge OSINT tools recently added to The OSINT Rack directory—PRISM, Kronikier, and GitLeak—each designed for specific intelligence-gathering use cases that every cybersecurity analyst, threat hunter, and investigator should have in their arsenal.

Learning Objectives:

  • Master the deployment and usage of PRISM, a self-hosted all-in-one OSINT platform with 22+ passive reconnaissance modules.
  • Learn how to extract historical contact information from archived website snapshots using Kronikier.
  • Understand how to uncover hidden email addresses and activity patterns from GitHub commits using GitLeak.
  • Develop proficiency in integrating these tools into comprehensive OSINT investigation workflows.

You Should Know:

1. PRISM – The All-in-One OSINT Powerhouse

PRISM is a self-hosted open-source intelligence platform that consolidates over 22 passive reconnaissance modules into a single web-based interface. Unlike traditional OSINT tools that require juggling multiple command-line utilities, PRISM provides a unified dashboard for scanning domains, IP addresses, email addresses, phone numbers, and usernames. The platform integrates with major intelligence sources including WHOIS, DNS, Shodan, VirusTotal, Wayback Machine, and breach databases. It also features real-time WebSocket tracking, AI-driven risk analysis, and an OPSEC score (0-100) that evaluates how exposed a target truly is.

What sets PRISM apart is its accessibility—14 of its 22 modules work without any API keys, making it immediately usable for beginners. For advanced users, the platform supports self-hosting with custom API keys for premium data sources like Shodan and VirusTotal. The demo version at getprism.su is rate-limited, but the full platform can be deployed locally via Docker.

Step-by-Step Guide: Deploying PRISM via Docker

 Clone the PRISM repository
git clone https://github.com/NovaCode37/Prism-platform.git
cd Prism-platform

Copy the environment configuration
cp .env.example .env

Edit .env to add your API keys (optional but recommended)
nano .env

Launch PRISM with Docker Compose
docker compose up --build

Once running, access the web interface at `http://localhost:3000`. From there, you can initiate scans by entering a target domain, email, or username. The platform will execute passive reconnaissance across all enabled modules, returning threat intelligence, subdomain enumerations, entity relationship graphs, GeoIP maps, and exportable HTML/PDF reports.

  1. Kronikier – Mining Historical Contacts from the Web Archive

Kronikier is a specialised OSINT tool that extracts historical contact information—email addresses and phone numbers—from web.archive.org snapshots. Its primary use case is investigating websites that no longer display contact details or have changed their information over time. By querying the Internet Archive API, Kronikier retrieves HTML from archived snapshots and parses out contact data that may have been present months or years ago but is no longer visible on the live site.

This tool is invaluable for threat intelligence analysts tracing the history of malicious domains, journalists verifying historical claims, and investigators building timelines of organisational changes. The Python-based script automates what would otherwise be a tedious manual process of browsing through dozens of Wayback Machine snapshots.

Step-by-Step Guide: Using Kronikier

 Install Kronikier via pip
pip install kronikier

Run a scan against a target domain
kronikier --domain example.com

Specify a date range for historical snapshots
kronikier --domain example.com --start 2020-01-01 --end 2023-12-31

Export results to JSON for further analysis
kronikier --domain example.com --output contacts.json

The tool will iterate through available snapshots, extract all email addresses and phone numbers found in the HTML, and present them with timestamps indicating when each piece of contact information was active on the site.

3. GitLeak – Uncovering Hidden GitHub Identities

GitLeak is a free OSINT tool that scans GitHub user profiles to extract email addresses, commit timezones, git usernames, and commit time patterns. The tool works by scraping `.patch` files appended to public commits, parsing out the email addresses embedded in commit metadata. This is significant because many GitHub users set their email to “private” on the web UI, yet their email addresses remain exposed in the underlying commit objects.

GitLeak addresses a critical privacy gap in GitHub’s architecture—while the platform offers privacy controls, the git protocol itself still transmits email addresses as part of commit metadata. Security researchers, bug bounty hunters, and threat actors alike use tools like GitLeak to map developer identities, correlate accounts across platforms, and identify potential targets for social engineering.

Step-by-Step Guide: Using GitLeak

  1. Navigate to https://gitleak.io
  2. Enter a GitHub username in the search field

3. Review the returned results, which include:

  • Email addresses associated with commits
  • Timezone information from commit timestamps
  • Git usernames and activity patterns
  1. Use the extracted email addresses for further OSINT correlation (e.g., breach database checks, social media discovery)

For programmatic access, GitLeak’s API can be integrated into automated investigation workflows. The tool is particularly effective when combined with other GitHub OSINT utilities like GitLeaks (for secret detection) and Gitrob (for sensitive file discovery).

  1. The OSINT Rack – A Curated Intelligence Directory

The OSINT Rack (https://osintrack.com) is a comprehensive directory featuring over 496 curated OSINT resources, categorised by use case. The platform aggregates tools, blog posts, courses, books, and events, making it an essential bookmark for any cybersecurity professional. Notable tools listed include BehindTheEmail for email-to-profile correlation, IGDetective for Instagram account tracking, Revealer for breach monitoring, and Breach House for ransomware and data leak intelligence.

5. Integrating OSINT Tools into Investigation Workflows

A comprehensive OSINT investigation typically follows a multi-phase approach:

Phase 1: Target Identification

  • Use GitLeak to identify email addresses associated with a developer or organisation
  • Cross-reference with PRISM for domain and IP reconnaissance

Phase 2: Historical Analysis

  • Deploy Kronikier to uncover historical contact information from archived website snapshots
  • Review Wayback Machine snapshots for content changes over time

Phase 3: Correlation and Enrichment

  • Use PRISM’s breach check and infostealer log modules to determine if credentials have been exposed
  • Leverage The OSINT Rack’s directory to identify additional specialised tools for your specific use case

Phase 4: Reporting

  • Generate comprehensive HTML/PDF reports from PRISM
  • Document findings with timestamps and source attribution for evidentiary purposes

6. Linux and Windows Commands for OSINT Automation

Linux/Bash Automation Script:

!/bin/bash
 OSINT automation script for domain investigation

TARGET_DOMAIN=$1
OUTPUT_DIR="./osint_results_$(date +%Y%m%d)"

mkdir -p $OUTPUT_DIR

Run PRISM scan (assuming local deployment)
curl -X POST http://localhost:3000/api/scan \
-H "Content-Type: application/json" \
-d "{\"target\":\"$TARGET_DOMAIN\",\"modules\":[\"whois\",\"dns\",\"subdomains\"]}" \
-o $OUTPUT_DIR/prism_results.json

Run Kronikier for historical contacts
kronikier --domain $TARGET_DOMAIN --output $OUTPUT_DIR/kronikier_results.json

WHOIS lookup
whois $TARGET_DOMAIN > $OUTPUT_DIR/whois.txt

DNS enumeration
dig $TARGET_DOMAIN ANY > $OUTPUT_DIR/dns_records.txt

echo "OSINT investigation complete. Results saved to $OUTPUT_DIR"

Windows PowerShell Commands:

 DNS reconnaissance
Resolve-DnsName -1ame example.com -Type A
Resolve-DnsName -1ame example.com -Type MX
Resolve-DnsName -1ame example.com -Type TXT

WHOIS lookup (requires Sysinternals or third-party tool)
 Invoke-WebRequest -Uri "https://api.whois.com/whois?domain=example.com"

Test email delivery (SMTP validation)
$smtp = New-Object Net.Mail.SmtpClient("mail.example.com", 25)
$smtp.EnableSsl = $false
 Note: This is for diagnostic purposes only

What Undercode Say:

  • The democratisation of OSINT tools through platforms like PRISM (self-hosted, open-source) and directories like The OSINT Rack is lowering the barrier to entry for cybersecurity professionals, but it also means defenders must assume attackers have access to the same capabilities.
  • The privacy implications of tools like GitLeak are profound—even with GitHub’s “private email” setting, commit metadata continues to leak identity information, highlighting the tension between platform convenience and actual privacy.
  • Historical data extraction via Kronikier demonstrates why organisations must consider not just their current digital footprint, but the persistent availability of their historical web presence—deleting a contact page today doesn’t erase the Wayback Machine’s copy from 2019.
  • The integration of AI-driven analysis in modern OSINT platforms (PRISM’s risk analysis, Blackbird’s behavioural summaries) represents a paradigm shift from manual data correlation to automated intelligence synthesis.
  • OSINT investigators must balance the power of these tools with ethical considerations and legal compliance—passive reconnaissance is generally permissible, but the line between intelligence gathering and active intrusion remains critical.
  • The OSINT Rack’s 496+ resources underscore the fragmentation of the OSINT tooling landscape; professionals benefit from curated directories that save countless hours of tool discovery and vetting.
  • As infostealer logs and breach databases become increasingly commoditised, tools that correlate compromised credentials (Revealer, IntelBase) are becoming essential for proactive threat hunting and incident response.
  • The shift toward self-hosted OSINT platforms like PRISM reflects growing concerns about data privacy and operational security—using third-party OSINT services means exposing your investigation targets to those platforms.
  • Real-time monitoring capabilities (Breach House, HaveIBeenRansom) are transforming OSINT from a periodic investigation activity into a continuous intelligence function.
  • The future of OSINT lies in automation and API integration—the ability to chain tools together programmatically will define the effectiveness of intelligence operations in 2026 and beyond.

Prediction:

  • +1 OSINT tool consolidation will accelerate, with platforms like PRISM evolving into comprehensive investigation suites that replace the need for dozens of standalone utilities, similar to how Metasploit consolidated penetration testing tools.
  • +1 AI-powered OSINT analysis will become standard, with machine learning models automatically correlating disparate data points and generating actionable intelligence reports with minimal human intervention.
  • -1 Privacy-preserving measures will struggle to keep pace with OSINT capabilities, as tools like GitLeak expose fundamental architectural flaws in platforms that claim to protect user data.
  • +1 The OSINT Rack and similar directories will become essential infrastructure for security teams, functioning as the “package managers” of the intelligence community.
  • -1 Regulatory scrutiny of OSINT tools will intensify as their capabilities become more accessible to non-technical users, potentially leading to restrictions on certain types of data extraction.
  • +1 Self-hosted OSINT solutions will gain enterprise adoption as organisations seek to maintain operational security and data sovereignty over their intelligence activities.
  • -1 The gap between what individuals believe is private and what OSINT tools can reveal will widen, creating new vectors for social engineering and targeted attacks.
  • +1 Integration of OSINT tools with SIEM and SOAR platforms will enable automated threat intelligence pipelines that continuously monitor for organisational exposures.
  • -1 Misuse of OSINT tools by malicious actors will increase, particularly in spear-phishing campaigns that leverage historical contact data from Kronikier and identity correlation from PRISM.
  • +1 The OSINT community will continue to innovate, with new tools emerging to address specific gaps in the intelligence landscape, further empowering both defenders and researchers.

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