Fake Password Managers Spread AMOS Malware on Mac: The 2025 LastPass Incident
In September 2025, LastPass reported an ongoing malware campaign targeting macOS users with fake password managers distributed through fraudulent GitHub repositories and deceptive SEO-optimized links. The attackers impersonated over 100 popular software products—including LastPass, 1Password, Dropbox, and others—using build-your-own repositories that redirected victims to install scripts containing the Atomic (AMOS) infostealer malware. Victims were instructed to run shell commands that downloaded backdoored payloads, risking credential theft, data exfiltration, and sustained system compromise. The campaign employed automated methods for rapid replication and evasive takedown resistance. This incident underscores a surge in supply chain and social engineering attacks using open platforms and SEO abuse, highlighting the persistent vulnerabilities in software distribution channels for macOS. It demonstrates attackers' growing sophistication in exploiting user trust and platform discoverability to deploy credential-stealing malware at scale.
Kill Chain