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LastPass Flags Ongoing macOS Attack Using Fake GitHub Repos to Push Atomic Stealer

Fraudulent GitHub pages use search placement to trick users into cURL-based installs of the Atomic macOS Stealer.

Overview

  • LastPass’s threat team reports a widespread, active campaign that targets Mac users through brand‑impersonating repositories on GitHub.
  • Two GitHub pages impersonating LastPass, posted on September 16 by the user “modhopmduck476,” were taken down after being reported.
  • Victims are funneled from fake project pages to macprograms-pro[.]com, where instructions prompt a Terminal cURL command to fetch an encoded payload.
  • The payload installs the Atomic macOS Stealer (AMOS), with operators rotating GitHub usernames and leveraging SEO to resurface after takedowns.
  • Researchers published indicators of compromise and examples of impersonated tools and services, urging users to avoid unverified repos and to not paste commands from untrusted pages.