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ESET detailed CloudMensis, a macOS spyware family designed for targeted espionage that collects sensitive information from infected systems and exfiltrates it through public cloud storage services. The malware was described as a relatively unsophisticated but effective implant that can steal documents, keystrokes, screen captures, email data, and other files of interest, while also issuing commands and retrieving additional payloads from attacker-controlled cloud accounts.
Researchers said CloudMensis relied on cloud-based infrastructure for command-and-control and data theft, a design that helped blend malicious traffic with legitimate online services and complicated detection. The report linked the operation to a limited number of victims and assessed it as part of a broader trend of macOS-focused surveillance activity, underscoring that Apple systems remain active targets for spyware operators despite the platform's reputation for stronger security.
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ESET publicly released a report detailing CloudMensis, a macOS spyware threat, including its capabilities and behavior. The reference indicates this disclosure occurred when the article was published.
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Security researchers reported a **macOS infostealer** dubbed **MacSync** being distributed as a low-cost **Malware-as-a-Service (MaaS)**, primarily targeting **cryptocurrency users** via a *ClickFix*-style social engineering lure. The campaign uses phishing infrastructure (including domains mimicking **Microsoft login** pages) to redirect victims to a fake macOS *cloud storage installer* site that instructs users to “install” by copying and pasting a **single Terminal command**. This approach relies on user execution rather than a signed app package, allowing the infection chain to **bypass macOS protections** such as **Gatekeeper** and **notarization**. Technical analysis describes a **script-based, multi-stage** infection chain: the pasted one-liner fetches a remote script that installs a **daemonized Zsh loader** which detaches from the Terminal session and runs in the background, then retrieves additional payloads (including **AppleScript**) to perform data theft. Beyond credential and wallet data harvesting, reporting indicates MacSync can **persist and expand impact** by **trojanizing Electron-based cryptocurrency applications** (e.g., *Ledger Live* and *Trezor Suite*) by overwriting components to present convincing phishing flows designed to capture **PINs** and **recovery phrases**, potentially triggering theft well after the initial compromise.
Jun 29, 2026
MacSync, a malware-as-a-service macOS stealer and remote-access stager, is being distributed through ClickFix social engineering, SEO poisoning, malvertising, compromised websites, and fake software or AI installers that prompt victims to run Terminal commands. Its native 64-bit Mach-O stager daemonizes itself, XOR-decrypts its configuration, downloads an AppleScript stealer from command-and-control (C2) infrastructure, and executes it in memory through `osascript`. The malware targets Keychain records, browser credentials and cookies, SSH keys, messaging sessions, cloud credentials, cryptocurrency wallets, and sensitive files. It archives collected data and exfiltrates it in 10 MB HTTP PUT chunks before deleting local staging artifacts; analyzed samples used `drivinguber.com` as primary C2 infrastructure and newsinweb.com-derived hosts as fallbacks. Public reporting associates MacSync with the earlier Mac.C Stealer and the developer identity “Mentalpositive,” though Russian-language artifacts do not substantiate attribution to a particular actor, syndicate, or affiliate campaign.
Sep 10, 2026
Microsoft reported that **information-stealing malware activity is expanding from Windows to macOS**, driven by campaigns observed since late 2025 that rely on social engineering and cross-platform tooling. The activity includes **ClickFix-style prompts** and **malicious DMG installers** that deliver macOS-focused infostealer families such as **Atomic macOS Stealer (AMOS)**, **MacSync**, and **DigitStealer**, with operators leveraging **fileless execution**, **native macOS utilities**, and **AppleScript automation** to evade defenses and automate collection. Initial access commonly starts with **malicious search ads (e.g., Google Ads)** that redirect users to fake sites impersonating legitimate tools and then trick victims into running “fix” steps or installing trojanized software. The malware is assessed to target high-value data including browser credentials and session cookies, **iCloud Keychain** contents, crypto wallet data, and **developer secrets**; Microsoft also highlighted growing use of **Python-based stealers** distributed via phishing for rapid adaptation across heterogeneous environments, citing **PXA Stealer** (linked to Vietnamese-speaking actors) as an example used in late-2025 campaigns with persistence mechanisms such as registry `Run` keys or scheduled tasks and **Telegram** used for command-and-control.
Jun 29, 2026