Atomic macOS Stealer (AMOS): Mach-O universal binary with XOR-obfuscated behavioral layer and dual HTTP C2 endpoints
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IIM chain built from an original reverse-engineering report published on 2026-05-31. The report analyzes a Mach-O universal binary associated with Atomic macOS Stealer (AMOS). The sample uses a rolling XOR routine keyed by 7M43mJx9I0GwjslSA2oKSgkqsUo to hide runtime strings, decrypts AppleScript- and shell-based operational commands, performs theft of browser, wallet, keychain, Telegram, Discord, FileZilla, Steam, Notes, and shell-history data, and sends stolen data over plain HTTP to 85.217.222.185 using /static.php and /index.php endpoints. No trustworthy initial-delivery URL, package source, or landing page is published, so the chain starts at the analyzed sample rather than inventing a pre-delivery stage.
entry · file · Atomic macOS Stealer (AMOS) Mach-O universal binary / ce6dc065752cb46437ce6a200e29d5dbd96473daa72dcce07aa493b821a99ba9 · no technique