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.
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Source: Palo Alto Unit 42
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