ClickFix Social-Engineering Campaigns Using Fake CAPTCHA and Fake Installer Pages
Security researchers reported multiple ClickFix campaigns that compromise endpoints by tricking users into manually executing attacker-provided commands rather than exploiting a software vulnerability. CERT Polska documented an incident response at a large Polish organization where a fake CAPTCHA prompt led a user to run a malicious snippet via Win+R, resulting in malware execution and suspected DLL side-loading from %APPDATA%\Intel (legitimate igfxSDK.exe/version.dll alongside a suspicious wtsapi32.dll). Investigators also identified additional suspicious DLLs in the user’s local AppData and recovered an execution trail consistent with a one-liner that fetched remote content and piped it into PowerShell (e.g., cmd /c curl ... | powershell).
Separately, threat hunting research described a macOS-focused ClickFix operation using typosquatted Homebrew lookalike sites to present a “copy/paste” install command that runs in Terminal. The first-stage script repeatedly prompted for a password and validated it using dscl authonly to harvest working credentials before deploying a second-stage infostealer dubbed Cuckoo Stealer, which was reported to establish LaunchAgent persistence, remove quarantine attributes, and communicate over encrypted HTTPS C2 while targeting browser credentials/session tokens, Keychain data, notes/messaging artifacts, VPN/FTP configs, and cryptocurrency wallets. Both reports highlight ClickFix as an increasingly common, opportunistic initial access technique that scales by abusing trusted user workflows on Windows and macOS.
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ClickFix Social Engineering Drives Multi-Platform Malware Delivery
Security researchers reported multiple active campaigns using **ClickFix** social engineering—fake error dialogs or verification prompts that trick users into manually running attacker-supplied commands—to bypass browser and download protections and establish an initial foothold. In one enterprise case investigated by **CERT Polska (cert.pl)**, victims were lured via compromised websites showing a fake CAPTCHA/“fix” prompt that instructed them to paste and run a **PowerShell** command via `Win+R`; the script then downloaded a dropper and enabled rapid follow-on activity that can scale to **enterprise-wide compromise**, including deployment of secondary malware such as **Latrodectus** and **Supper** for data theft, lateral movement, and potential ransomware staging. A separate ClickFix operation targeted **macOS developers** by cloning the *Homebrew* site on typosquatted infrastructure; the “install” command was subtly altered to fetch content from `raw.homabrews.org` instead of `raw.githubusercontent.com`, leading to **Cuckoo Stealer** deployment and credential harvesting via repeated password prompts using macOS Directory Services, with related domains tied to shared hosting at **`5.255.123.244`**. ClickFix was also observed as the initial execution mechanism for the resurfaced **Matanbuchus 3.0** MaaS loader, which uses deceptive copy/paste prompts and **silent MSI** execution (via `msiexec`) to deliver a new payload, **AstarionRAT**, enabling capabilities including credential theft and **SOCKS5** proxying; operators were reported to move laterally quickly (including toward domain controllers), consistent with ransomware or data-exfiltration objectives.
3 weeks ago
ClickFix Social-Engineering Technique Using Fake CAPTCHA to Trigger Manual Command Execution
A **ClickFix**-style malware campaign has been observed using **fake CAPTCHA** pages on compromised websites to trick users into **manually executing** malicious commands, enabling initial access while evading controls that focus on downloaded files. In the reported activity, victims are prompted to copy a **PowerShell** command and run it themselves; the script then downloads additional stages from attacker infrastructure (including `91.92.240.219`), verifies user interaction by checking clipboard activity, and proceeds through a multi-stage infection chain. The payload is an **information stealer** targeting data from **25+ web browsers**, cryptocurrency wallets (e.g., *MetaMask*), and enterprise VPN configurations, with checks for virtualized environments and security tooling prior to exfiltration. Separately reported threat activity in the same time window includes **UnsolicitedBooker** targeting Central Asian telecoms with phishing-delivered backdoors (**LuciDoor** and **MarsSnake**) and **APT28** running *Operation MacroMaze*, which uses weaponized Office documents and `INCLUDEPICTURE` fields pointing to `webhook[.]site` URLs as a tracking mechanism and to support follow-on macro-based payload delivery. A video-style weekly briefing also mentions an evolution of ClickFix where an initial command uses `nslookup` and parses the response for execution, but it is a multi-topic roundup rather than a primary source on the fake-CAPTCHA infostealer campaign; a malware newsletter roundup is likewise a link collection and does not add specific, corroborating details about the ClickFix CAPTCHA infostealer operation.
3 weeks ago
ClickFix Social Engineering Campaigns Using Terminal Commands to Install Stealers
Multiple reports highlighted **ClickFix**-style social engineering that convinces users to paste attacker-supplied commands into a terminal, leading to infostealer installation. Malwarebytes documented a macOS lure impersonating *CleanMyMac* via `cleanmymacos[.]org`, where victims are instructed to run a Terminal command that prints a reassuring message, decodes a hidden (base64) destination, and then downloads and executes a remote shell script via `zsh`. The resulting payload installs **SHub Stealer**, which targets saved passwords, browser data, Apple Keychain contents, Telegram sessions, and cryptocurrency wallets; it can also tamper with wallet applications (e.g., *Exodus*, *Atomic Wallet*, *Ledger Live*) to enable later theft of recovery phrases. Microsoft threat intelligence (as reported by The Hacker News) described a parallel **Windows** ClickFix campaign that shifts from the traditional Run-dialog paste to **Windows Terminal** (`wt.exe`) using the `Win + X → I` shortcut, exploiting the tool’s administrative legitimacy to reduce suspicion and evade detections tuned to Run-dialog abuse. In that chain, users paste a hex-encoded/XOR-compressed command that spawns additional Terminal/PowerShell stages to decode scripts, download a ZIP payload plus a legitimate-but-renamed **7-Zip** binary, extract additional components, establish persistence via **scheduled tasks**, configure **Microsoft Defender exclusions**, and ultimately deploy **Lumma Stealer** (including use of `QueueUserAPC()` for injection).
1 weeks ago