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Atomic macOS Stealer (AMOS) was delivered through a fraudulent macOS toolkit installation site, getmacouscloud[.]com, that instructed victims to paste malicious commands into Terminal. The commands retrieved Zsh scripts that installed persistent AMOS Mach-O payloads, then prompted users for their macOS password and requested system permissions to facilitate collection.
The stealer targets system information, credentials and Keychain data, browser and messenger artifacts, cryptocurrency-wallet data, and locally accessible files, staging collected content in /tmp/out.zip. In the observed infection, AMOS sent data to 161.35.146[.]120 via HTTP POST requests whose URL stages exposed the collection workflow; defenders should prioritize behavioral detection because its infrastructure, filenames, paths, hashes, and C2 addresses change rapidly while its social-engineering delivery and data-theft patterns remain consistent.
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The analyzed infection staged collected data in /tmp/out.zip, including browser, messenger, wallet, cloud-service, and local-file data, then primarily sent HTTP POST requests to C2 server 161.35.146[.]120. Its request paths exposed collection stages including boot, init_session, credentials, browsers, wallets, messengers, and local_data.
A laboratory-generated AMOS infection was observed being delivered through getmacouscloud[.]com, a fraudulent macOS toolkit-installation page that instructed users to paste a malicious command into Terminal. The command retrieved scripts from ferncore13[.]com and installed persistent AMOS components while seeking user credentials and macOS permissions.
A separate AMOS infection was observed using C2 server 188.166.78[.]138. Its C2 URL patterns remained similar to those seen in other AMOS activity.
Atomic macOS Stealer (AMOS), a macOS-focused information stealer, was advertised on Telegram as early as April 2024.
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A malicious advertisement redirected users to a counterfeit Homebrew page that instructed victims to paste text into Terminal, leading to an **Atomic macOS Stealer (AMOS)** infection on macOS systems. The observed chain dropped files into `/tmp` and installed a persistent payload, with supporting artifacts including password-protected ZIP archives, temporary files, and a malware directory used to maintain access after execution. AMOS is a Golang-based macOS information stealer sold through criminal channels and marketed with ongoing updates and operator support. The malware is designed to harvest **Keychain data**, browser credentials, files, cryptocurrency wallet data, and system information, while also using fake password prompts to capture the macOS password before exfiltrating stolen data to command-and-control infrastructure and Telegram; researchers have previously linked the offering to a subscription model that included a victim management panel and other follow-on criminal services.
Jul 12, 2026
**Atomic macOS Stealer (AMOS)** has emerged as a leading macOS infostealer sold as a malware-as-a-service offering on Telegram and used in campaigns that rely heavily on social engineering rather than exploits. Researchers found the Golang-based malware distributed in forms including malicious DMG installers and ClickFix-style lures that trick users into running Terminal commands, after which it captures or validates the victim’s macOS password, steals **Keychain** contents, browser credentials, cookies, autofill data, files, Apple Notes, extension storage, session tokens, system information, and cryptocurrency wallet data, then exfiltrates the results to attacker-controlled infrastructure and, in earlier observed versions, Telegram. Operators have advertised AMOS for **$1,000 per month** alongside add-on services such as a victim panel, crypto tooling, and installer support. Sophos said AMOS accounted for nearly **40%** of its macOS protection updates in 2025 and almost half of recent macOS stealer cases seen by customers, underscoring its scale and persistence. In one investigated intrusion, a bootstrap script fetched from `sphereou[.]com` downloaded a second-stage payload, performed anti-analysis checks, registered with command-and-control, and established persistence through a **LaunchDaemon** after obtaining elevated access. Earlier reporting tied AMOS infrastructure to `amos-malware[.]ru`, with exfiltration observed to `/sendlog`, while newer variants increasingly use AI-themed lures, fake installers, cracked apps, repeated password prompts, and fake Ledger and Trezor modules to broaden credential theft and cryptocurrency targeting.
Jun 29, 2026
Researchers reported multiple campaigns distributing macOS infostealers tied to the **AMOS/AtomicStealer** ecosystem, a malware-as-a-service operation that steals credentials, browser data, cryptocurrency wallets, Apple Notes, files, and **Keychain** material from macOS Catalina and newer systems on Intel, M1, and M2 devices. Earlier reporting on related macOS stealers showed operators relying on social engineering, unsigned DMG files, and password prompts to collect sensitive data, package it into archives, and exfiltrate it to command-and-control servers, with some activity also summarized to Telegram channels. More recent campaigns used **malvertising** and fake software or troubleshooting pages to lure users into running Terminal commands that fetched an AMOS variant known as **"malext"**. Investigators said the malware used obfuscated shell commands, `osascript`, quarantine removal, anti-VM and sandbox checks, and in some cases installed persistence through a LaunchDaemon and helper scripts, while also trojanizing Ledger and Trezor applications and capturing administrator passwords. Reporting also linked AMOS delivery to fake **CleanMyMac** sites and AI-themed lures, indicating operators are rapidly rotating ad accounts and adapting infection vectors to broaden theft and remote access on macOS systems.
Jun 29, 2026