How to Spot and Avoid Fake Authenticator Apps on GitHub

What’s the biggest mistake people make with fake authenticator apps? Most of us assume that any GitHub repository that looks like a legitimate tool – especially one named after a popular password manager – is safe to download. In reality, attackers are publishing SEO‑optimised repos that masquerade as "LastPass Authenticator" and slip a new infostealer called Rapuncel onto your machine. How can you tell a fake authenticator repo from the real thing? We see this a lot on the support desk: a user downloads a zip from GitHub, runs the installer, and suddenly the Task Manager shows a "svchost.exe" spiking to 100% CPU while the browser starts sending passwords to an unknown server. Check the URL – the official LastPass Authenticator lives on the Google Play Store or Apple App Store, not on a personal GitHub page. Look at the author – reputable repos are owned by the vendor’s verified organisation, not a random username. Read the reviews – genuine apps have thousands of ratings; a fake repo will have none or only a handful of generic comments. If you’re ever in doubt, we recommend using the built‑in 2‑FA options in the LastPass web portal or a hardware token. Decision guide – what to do about questionable authenticator downloads We lay out the realistic options, compare cost and effort, then give a clear recommendation. Stick with the official app from the app store. Free, receives automatic updates, and is verified by the store’s security checks. Time to install: 5‑10 minutes. No