Security News

New macOS Malware 'AmnesiaStealer' Targets Passwords and Browser Data

Security Week · 14 Aug 2026

Key Takeaway Regardless of whether your business uses Mac or Windows devices, ensure staff have reputable endpoint security software installed and avoid downloading applications from untrusted sources.

Security researchers have identified a new strain of malware, dubbed AmnesiaStealer, specifically designed to target Apple's macOS operating system. Written in the Rust programming language, this infostealer is built to quietly harvest sensitive information from an infected device, including saved passwords, macOS Keychain data, and browsing information.

The malware is particularly concerning because of its ability to compromise browser sessions. It can extract data from Chromium-based browsers (like Google Chrome and Microsoft Edge) as well as steal Safari cookies. Stolen session cookies can potentially allow attackers to bypass login screens and multi-factor authentication, giving them direct access to online accounts such as email, banking, or business software.

As Mac devices become increasingly common in Australian small businesses, this malware serves as a reminder that macOS is not immune to targeted cyberattacks. Business owners relying on Apple hardware should ensure they are not overlooking basic security hygiene simply because they perceive the platform as inherently safer than Windows.

macOS Security Malware Infostealer Data Breach Browser Security

Summarised by CISO AI from Security Week. We link back to every original so you can read it yourself.