crt.go

by an4kein

11stars

3forks

1watchers

Updated about 1 year ago

About

A fast command-line tool written in Go for scanning domains via crt.sh to gather certificate transparency data.

Status: beta

Primary Use Case

This tool is primarily used by security researchers and threat intelligence analysts to quickly enumerate domains and subdomains by querying certificate transparency logs on crt.sh. It helps in OSINT investigations and vulnerability scanning by revealing domain certificates associated with a target.

Key Features

Fast scanning of domains using crt.sh
Written in Go for performance
Command-line interface for easy usage
Supports OSINT and vulnerability scanning workflows
Beta status indicating ongoing development

Installation

Download or clone the repository from GitHub
Build the tool using Go or download precompiled binaries if available
Run the executable directly on supported platforms

Usage

>_ ./crt <TARGET>

Scans the specified target domain against crt.sh to retrieve associated certificate transparency data.

Security Frameworks

Reconnaissance

Discovery

Collection

Usage Insights

Integrate crt.go into automated OSINT pipelines to enhance domain enumeration speed and accuracy.
Use crt.go results to enrich threat intelligence feeds with newly discovered subdomains and certificates.
Combine crt.go outputs with vulnerability scanners to prioritize scanning of exposed subdomains.
Leverage crt.go in red team reconnaissance phases to identify attack surface expansion opportunities.
Incorporate crt.go scans into continuous monitoring workflows for early detection of unauthorized certificate issuance.