OpenBullet is a controversial and powerful open-source web testing application that's often associated with credential stuffing attacks, web scraping, and automation of interactions with websites.

Here’s a breakdown of what it is and how it’s used (legitimately and otherwise):

🔍 What is OpenBullet?
OpenBullet is a tool originally developed for testing the security of web applications, APIs, and other online platforms. It allows users to automate login attempts, scrape data, and interact with web pages by sending HTTP requests based on customizable "configs."

🧩 Key Features
Config System: Lets users define how to interact with a website (login URL, POST data, parsing HTML/JSON, etc.)

Proxy Support: Works with rotating proxies to hide IP addresses

Combo List Handling: Uses combinations of usernames/emails and passwords

Data Parsing: Extract specific data from HTTP responses (tokens, cookies, etc.)

Automation: Automates tasks like login attempts, scraping, or testing APIs

⚖️ Legal vs. Illegal Use
✅ Legit Uses:

Penetration testing by cybersecurity professionals

QA/testing for web applications

Educational purposes (with permission)

❌ Illegit Uses:

Credential stuffing attacks (using stolen username/password combos)

Bypassing login systems

Brute-force attacks

Account checking on streaming services, gaming platforms, etc.

Because of its ease of use and effectiveness, it’s widely used in the cybercrime underground, especially on forums that distribute leaked credentials.

🚨 Important Note:
Using OpenBullet without permission to test or access systems is illegal in many countries and violates the Computer Fraud and Abuse Act (CFAA) and similar laws.