Fake Claude Downloads Push Malware via Google Ads

Cybersecurity News · High sophistication
Last updated October 27, 2026

Attackers used paid Google ads to direct people to fake Claude download pages hosted on Anthropic’s real claude.ai website. The pages used a ClickFix trick: they told Mac and Windows users to paste a command into their device, installing password- and cryptocurrency-stealing malware. Because the domain and branding looked legitimate, users could easily mistake the lure for an official Claude download page.

Key findings

  • Attackers hosted fake Claude download instructions in user-generated Shared Chats and public Artifacts on the genuine claude.ai domain.
  • Paid Google Ads placed the malicious pages near the top of search results, with tracking parameters indicating funded ad campaigns.
  • The macOS lure instructed users to copy and run a scrambled Terminal command, installing Atomic macOS Stealer (AMOS).
  • A separate Windows lure instructed users to use Win + R, Ctrl + V, and Enter to execute a malicious PowerShell command.
  • The malware targeted passwords, browser sessions, cryptocurrency wallets, wallet recovery phrases, and sensitive files.

Who’s being targeted

  • Commonly targeted roles: All employees, macOS users, Windows users, Developers, Executives, Finance teams, Cryptocurrency holders, IT support teams.
  • Affected industries: Information and Media, Financial Services, Cryptocurrency and Digital Assets, Technology, All industries using macOS or Windows devices.
  • Attack channels: website.
  • Impersonated: Anthropic / Claude.

Awareness takeaways

  • Never paste a command into Terminal, PowerShell, or the Windows Run dialog unless you understand it and obtained it through a trusted, verified process.
  • Use a bookmarked vendor site or type the vendor address yourself instead of trusting sponsored search results for software downloads.
  • Treat user-generated pages on legitimate websites as untrusted, even when the address bar, padlock, and branding look genuine.
  • Never provide a cryptocurrency wallet recovery phrase to software that unexpectedly asks for it; verify the application independently first.

Red flags to watch for

  • An app download page asks the user to run a Terminal command rather than providing an installer.
  • The command is scrambled, so the user cannot clearly see what it will do.
  • The page is labeled user-generated and unverified despite using a genuine Claude domain and branding.
  • The installation instructions require pasting an unseen command into the Windows Run dialog.
  • The command displays vague “verification” messages instead of using a normal software installer.
  • A Claude download page asks the user to bypass ordinary download and installation steps.
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Read the video transcript

Searching for Claude? That sponsored result could lead to malware. Here’s the twist: the page really is on claude.ai, but it’s an unverified, user-generated Shared Chat or Artifact, not an official download. The ClickFix trick says to paste a scrambled command into Mac Terminal, or press Win-R, Ctrl-V, Enter on Windows. That installs stealers targeting passwords and crypto wallets. The giveaway: installers don’t need mystery commands. Skip the ad; type claude.ai yourself and use its official download link.

MITRE ATT&CK techniques

T1656 - ImpersonationT1059.001 - Command and Scripting Interpreter: PowerShell · Command and Scripting InterpreterT1059.004 - Command and Scripting Interpreter: Unix Shell · Command and Scripting InterpreterT1204 - User Execution

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