Threats Tagged 't1059.002'

MacSync Stealer is a macOS information stealer and remote-access stager delivered through ClickFix social engineering and malvertising campaigns. Operating under a malware-as-a-service model, it employs sophisticated evasion techniques including process daemonization, single-byte XOR obfuscation, and in-memory AppleScript execution to bypass Apple Gatekeeper, XProtect, and EDR solutions. The malware exfiltrates credentials, browser data, cryptocurrency wallets, and SSH keys through fault-tolerant 10MB chunked uploads to command-and-control infrastructure. MacSync targets professionals in software engineering, cryptocurrency, fintech, and corporate environments across North America, Europe, and Asia-Pacific regions, with campaigns impersonating legitimate services like Google Meet, Claude AI, Docker, and TradingView to trick victims into executing malicious Terminal commands.

MediumMalwareUnited StatesAustraliaBritish Indian Ocean Territory+7#credential theft#obfuscation#applescript

This macOS malware campaign uses social engineering via fake CAPTCHA pages to trick users into running malicious AppleScript commands. It deploys a persistent backdoor that leverages EtherHiding by storing command-and-control (C2) addresses in Polygon blockchain smart contracts, complicating detection. The malware maintains persistence through LaunchAgents and delivers multiple payloads including the AMOS stealer, which targets cryptocurrency wallets, browser credentials, and macOS Keychain data, as well as the XMRig cryptominer for ongoing revenue. The campaign employs advanced evasion techniques such as character-ID obfuscation and abuse of legitimate macOS utilities. Blockchain transaction analysis reveals the full history of C2 infrastructure rotation and funding, aiding defenders despite the malware's memory-resident nature.

After months of dormancy, XCSSET malware version 40 emerged in April 2026 targeting macOS developers through supply chain attacks. The malware hides in Xcode projects of legitimate applications on GitHub, spreading through infected development environments. V40 features advanced detection evasion through polymorphic payload generation, fileless persistence, and in-memory execution while weakening security mechanisms. It introduces 17 distinct modules including a Chrome hijacking backdoor via Chrome DevTools Protocol and a Telegram trojanizer. The malware employs multi-layered encryption, disables system security updates, terminates cloud telemetry, and locks XProtect signature databases. Primary targeting focuses on developers across South Asia. The infrastructure utilizes approximately 40 domains registered in Russia and India, demonstrating a geographic pivot in operations.

A new variant of SHub Stealer dubbed 'Reaper' targets macOS users through fake WeChat and Miro installers, employing sophisticated multi-stage delivery chains that spoof Apple, Google, and Microsoft services. The malware leverages the applescript:// URL scheme to bypass Terminal-based defenses, conducting extensive fingerprinting and anti-analysis checks before execution. Reaper harvests browser credentials, cryptocurrency wallets, developer configurations, iCloud data, and Telegram sessions. It includes an AMOS-style document theft module targeting files under 150MB with chunked uploads. The variant establishes persistence through a fake Google Software Update LaunchAgent and installs a backdoor for remote code execution. The infection specifically avoids CIS regions and employs extensive anti-analysis techniques including WebGL fingerprinting, VM detection, and DevTools interference.

MioLab, also known as Nova, is a sophisticated Malware-as-a-Service platform targeting macOS environments, heavily advertised on Russian-speaking underground forums. The platform features extensive data exfiltration capabilities, including browser credential theft, cryptocurrency wallet targeting (supporting over 200 browser extensions and 50+ desktop wallets), and a premium module specifically designed to compromise Ledger and Trezor hardware wallets by intercepting 24-word BIP39 recovery seed phrases. The lightweight C-based payload supports both Intel and Apple Silicon architectures across macOS versions from Sierra to Tahoe. MioLab employs sophisticated social engineering through customizable DMG builders with live preview features, fake system prompts, and ClickFix integration. Recent updates demonstrate rapid development, including Safari cookie grabbing, automated Apple Notes decryption, and universal hardware wallet modules. The operation utilizes bulletproof hosting services and shares infrastruct...

On April 23, 2026, Field Effect MDR identified AMOS Stealer malware delivered through a novel technique exploiting Cursor AI agent sessions running Claude Code. The attack employed social engineering to manipulate operators into prompting the AI agent to download and execute malicious AppleScript loaders. The heavily obfuscated scripts performed sandbox evasion checks, collected sensitive data including credentials, SSH keys, browser data, and cryptocurrency wallets, then exfiltrated compressed archives to remote servers within two minutes. The malware prompted users for local account credentials through fake macOS system dialogs, subsequently using elevated permissions to install persistent implants masquerading as legitimate system services. This delivery mechanism makes detection challenging as malicious commands blend with typical agentic coding behavior, representing an evolution in AMOS Stealer tactics beyond traditional SEO poisoning methods.

A sophisticated ClickFix campaign targets both Windows and macOS users through fake CAPTCHA pages that trick victims into executing malicious commands. The macOS variant deploys an AppleScript-based infostealer that harvests sensitive data including keychain databases, credentials, and session cookies from 12 browsers, over 200 browser extensions, and 16 cryptocurrency wallets. The malware employs a persistent, non-closable dialog box mimicking legitimate system prompts to force victims into providing their system password. Stolen session cookies enable attackers to bypass multi-factor authentication by hijacking active sessions. The campaign uses client-side JavaScript to filter victims by user-agent, directing desktop users to OS-specific payloads while ignoring mobile devices. Latest macOS updates include native terminal security warnings designed to alert users against pasting potentially malicious commands.

Microsoft Threat Intelligence uncovered a macOS-focused cyber campaign by North Korean threat actor Sapphire Sleet utilizing social engineering to compromise systems. The attack chain begins with a malicious AppleScript file disguised as a Zoom SDK update, which executes cascading payloads through curl-to-osascript chains. The campaign deploys multiple backdoors including com.apple.cli, services, icloudz, and com.google.chromes.updaters for persistence and command execution. Credential harvesting occurs through fake system dialogs that mimic legitimate macOS password prompts. The threat actor bypasses Transparency, Consent, and Control protections by directly manipulating the TCC database, enabling extensive data exfiltration targeting cryptocurrency wallets, browser credentials, Telegram sessions, SSH keys, and Apple Notes. Operations focus on cryptocurrency, finance, and blockchain organizations with the primary objective of stealing digital assets.

A supply chain attack targeting Axios npm package versions 1.14.1 and 0.30.4 introduced a malicious transitive dependency ([email protected]) that executed during installation. The attack deploys cross-platform payloads across Linux, Windows, and macOS through a consistent pattern: Node.js spawns OS-native shells to retrieve and execute remote payloads in detached or hidden contexts. Linux victims receive a Python-based RAT, Windows systems get a PowerShell backdoor with registry persistence, and macOS hosts are compromised with a Mach-O binary backdoor. All variants beacon to the same C2 infrastructure, performing host fingerprinting, process enumeration, filesystem reconnaissance, and arbitrary code execution. The malicious activity is reliably detected through behavioral signatures focusing on unusual Node.js process ancestry and remote payload retrieval rather than static indicators.

A deceptive website impersonating CleanMyMac tricks users into installing SHub Stealer, a sophisticated macOS malware. The malware steals sensitive data, including passwords, browser data, cryptocurrency wallets, and Telegram sessions. It can also modify wallet apps to steal recovery phrases. The attack begins with users pasting a command into Terminal, which downloads and executes a malicious script. The malware performs extensive data collection from various browsers and wallet applications, and installs persistent backdoors in certain crypto wallet apps. SHub Stealer is part of a growing family of AppleScript-based macOS infostealers, demonstrating increasing sophistication in targeting Mac users.

MediumMalwareUnited StatesCanadaUnited Kingdom+7#browser data theft#clickfix#applescript