PamStealer Uses Fake Maccy Sites and PAM Checks to Steal Mac Login Passwords
Cybersecurity researchers have flagged a new macOS information stealer called PamStealer that employs a series of clever tricks to infect systems and siphon sensitive data. The stealer, discovered by Jamf Threat Labs, is distributed as a compiled AppleScript (.scpt) file impersonating Maccy, a legitimate open-source clipboard manager. It has been codenamed PamStealer owing to its ability to validate the victim's login password through the macOS Pluggable Authentication Modules ( PAM ) before capturing it. The malware is delivered in two stages: A compiled AppleScript distributed inside a disk image that's designed to download and stage a follow-on payload. The secondary artifact is a Rust-based infostealer capable of credential theft, browser data collection, persistence, and exfiltration. The initial access vector for the malware is a lookalike site ("maccyapp[.]com") that mimics Maccy ("maccy[.]app"). The AppleScript ("Maccy.scpt") pres...
î Jul 03, 2026