OpenBullet is legitimate software. However, because it deals with sensitive data (proxies, credentials), it is a high-value target for attackers. Fake "cracked" or "pre-configured" versions on YouTube or forums are often infostealers.
OpenBullet 1.4.4 is a highly specialized, open-source web testing suite used primarily for security auditing, web scraping, and automated penetration testing. While it was originally developed for legitimate developers to test their own web applications, its powerful automation capabilities—such as proxy management and CAPTCHA solving—have made it a popular choice in the broader cybersecurity community. openbullet 1.4.4 download github