Atomic macOS (AMOS) Stealer Activity

This article reviews an Atomic macOS (AMOS) stealer malware infection generated in a lab environment. While several sources have published articles analyzing AMOS stealer, the associated indicators constantly change. This article presents a snapshot of indicators seen in early August 2026 and is designed to help readers better understand AMOS stealer.

AMOS stealer is an information stealer targeting macOS systems that was advertised on Telegram as early as April 2024. AMOS stealer represents a noticeable portion of macOS stealer-based malware and is considered a growing threat. AMOS stealer exfiltrates system information, login credentials and other sensitive data from various applications, including web browsers and cryptocurrency wallets.

Malware that we've assessed as AMOS stealer has been distributed through ClickFix campaigns as well as through malicious ads. We've also seen AMOS stealer distributed through campaigns that claim to offer cracked versions of popular copyright-protected software. These sites offer instructions to install software such as a macOS toolkit but then actually install malware like AMOS stealer.

This article examines an AMOS stealer infection generated on Aug. 5, 2026, from an instructional page claiming to install a “macOS toolkit.”

The domain hosting the malicious page claiming to have installation instructions for a macOS toolkit is getmacouscloud[.]com. An example of one of the pages is shown below in Figure 1.

While the “quick setup” instructions from this page in Figure 1 are sometimes described as a ClickFix technique, this is not really ClickFix. The ClickFix technique generally uses a fake CAPTCHA or other type of verification page offering instructions to continue to the website a viewer intends to visit. ClickFix campaigns inject a script into a viewer's clipboard to paste into a Run window for Windows systems or a Terminal window for macOS systems.