Odyssey macOS Stealer Malware Analysis — A CyberDudeBivash Deep Dive

1. Introduction: A New Threat in the macOS Ecosystem

Emerging in 2025, Odyssey Stealer represents the next wave of macOS infostealer malware. Delivered via ClickFix phishing tactics, it masquerades as legitimate prompts—often mimicking Apple App Store or finance-related sites—to trick macOS users into running malicious scripts. Once inside, it silently harvests credentials, browser cookies, wallets, and more—leveraging users as unwitting accomplices.

2. Distribution & Infection Vector

Researchers at Forcepoint’s X-Labs describe the infection path:

Victims visit spoofed sites like “tradingviewen[.]com.”
Presented with a fake CAPTCHA, users are guided to paste a Base64-encoded command into Terminal.
This fetches and runs a malicious AppleScript payload using curl and bash.
Forcepoint

3. Technical Anatomy & Execution Flow

Jamf Threat Labs investigations revealed:

The malware is delivered via DMG installers, often code-signed and notarized, yet disguised using common app names like Gmeet_updater.app.
On execution, it launches a SwiftUI-based “Technician Panel”, enhancing trust through polished UI.
This panel fetches more malicious AppleScripts dynamically, prompting the user for their macOS password.
Jamf

4. Malicious Capabilities & Behavior

Odyssey Stealer is a comprehensive infostealer with these notable features:

Targets sensitive data: Keychain credentials, wallet files (e.g., Exodus, Electrum, MetaMask), browser cookies, saved passwords, and even documents.
Packages stolen data into out.zip and exfiltrates it via curl—retrying silently up to 10 times to ensure delivery.
CYFIRMA PCRisk

5. Backend Infrastructure & MaaS Features

CYFIRMA’s intelligence reveals a robust attacker ecosystem:

Operates through a feature-rich control panel (dashboard, malware builder, logs, “Google Cookies Restore”) often hosted on Russian servers.
Odyssey is a rebrand of Poseidon Stealer and a direct evolution of the AMOS Stealer codebase, developed by the original author “Rodrigo.”
CYFIRMA SC Media

6. Detection & Industry Observations

Malwarebytes labels the malware as OSX.Odyssey, noting its modal use of AppleScript and fake installers for distribution. It stores data in temporary directories and communicates with C2 servers.
Malwarebytes
PCRisk underscores that Odyssey targets macOS systems, extracting everything from system data to crypto wallets via deceptive installers and phishing tactics.
PCRisk

7. Threat Context: AMOS and Beyond

Recent news highlights an ominous evolution:

AMOS Stealer, a progenitor of Odyssey, now sports a persistent backdoor capable of surviving reboots, enabling attackers to deploy further payloads.
TechRadar
The rising Shamos stealer demonstrates how ClickFix tactics are expanding rapidly—malware disguised as help tools, using deceptive prompts to lure users into running terminal-based scripts.
Tom’s Guide

8. Mitigation Strategies — CyberDudeBivash Recommendations

To shield users from Odyssey-like threats:

Educate users on never pasting Terminal commands from unverified sources.
Enable Gatekeeper and avoid installing unsigned apps.
Deploy macOS-compatible endpoint protection, e.g., Malwarebytes for Mac, to detect stealer variants.
Segment critical data access and revoke disk permissions for vulnerable apps.
Monitor network exfiltration, enforcing DNS and IP filtering to block known C2 infrastructure.
When detected, run full system scans with trusted tools, or isolate the device for forensic evaluation.

9. Final Thoughts: The Broader Threat Landscape

Odyssey Stealer is emblematic of the growing malware-as-a-service (MaaS) trend targeting macOS. Crafted by experienced authors and equipped with advanced UI ruses, it exemplifies how macOS users remain vulnerable—especially when lured into executing commands.

As security becomes increasingly layered with AI, education and defense must evolve too. At CyberDudeBivash, we emphasize preventive instincts, swift detection, and resilience through human–AI collaboration.

TechRadar One of the biggest security threats to Apple systems just got a major upgrade – here’s what we know Jul 8, 2025 Tom’s Guide Macs under attack from dangerous new info-stealing malware – how to stay safe 10 days ago

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