If you are a wanting to see how credential stuffing works, you should use a lab environment.
If you are a authorized to test a client's login infrastructure, you use legitimately sourced tools. openbullet 1.4.4 anomaly download
Compile from source. Do not touch "Anomaly" repacks. If you are a student: Use a disposable virtual machine. Assume every download is hostile. If you are a victim: If you ran this file, immediately change your passwords, wipe your machine, and notify your bank. If you are a wanting to see how
A forum post titled: "OpenBullet 1.4.4 ANOMALY EDITION - 10k Configs + Proxies (Undetectable)" gets 500 upvotes. Do not touch "Anomaly" repacks
Upon unzipping, the user sees OpenBullet.exe (legit) but also Loader.exe or ConfigUpdater.exe . Doubting nothing, they run the loader.
The "anomaly" isn't a feature. It is the statistical outlier where the attacker becomes the attacked. Stay safe, stay skeptical, and always verify your hashes. Have you encountered a safe fork of OpenBullet 1.4.4? Discuss it responsibly in professional penetration testing forums, not in the comments below.
If you are a looking for "undetectable" tools, you will find the "Anomaly" download—and it will likely turn you into the victim.