HBO Max Reddit Ads Hijacked to Spread ClickFix Malware

eSecurity Planet · High sophistication
Last updated September 16, 2026

Attackers compromised HBO Max’s verified Reddit advertising account and used it to run 108 malicious ads in about 48 hours. The ads sent people to attacker-controlled websites that used “ClickFix” instructions to trick users into running commands that installed malware on Windows and macOS.

Key findings

  • Attackers compromised HBO Max’s verified Reddit advertising account and used it to distribute malware via promoted ads.
  • The campaign ran for about 48 hours and included 108 malicious ads.
  • Ads redirected to attacker-controlled sites using “ClickFix” (copy/paste and run a command) to get the victim to perform the execution step.
  • Multiple lures were used (streaming, AI/developer tools, macOS utilities) to reach different audiences.
  • Windows victims were pushed toward MSHTA and PowerShell execution; observed payloads included infostealers and macOS malware.

Who’s being targeted

  • Commonly targeted roles: All employees, Marketing / Social media, IT / Helpdesk, Developers / Engineering, Executives, Mac users, Employees who use cryptocurrency wallets.
  • Affected industries: Streaming / Media, Social media platforms, Online advertising, Software / Developer tools, Consumers (end users), Cryptocurrency users.
  • Attack channels: website.
  • Impersonated: HBO Max (via a verified Reddit advertising account), Fake AI/developer tool site or fake macOS utility site.

Awareness takeaways

  • Treat ads and promoted posts as untrusted, verification badges and brand names can be abused.
  • Never paste and run commands from a webpage or ad; escalate to IT/security for verification.
  • Be especially cautious of command-based install steps (PowerShell/curl/wget) that download and execute code.
  • Use official sources for software and utilities (official vendor website or trusted app store), not ad-driven install flows.

Red flags to watch for

  • An ad or webpage asks you to paste/run a command in Terminal or PowerShell
  • The destination domain is not an official HBO Max domain
  • The workflow relies on you manually executing instructions rather than using an app store or official download page
  • Tool-install instructions delivered via an advertisement instead of a trusted vendor channel
  • Commands that download and immediately execute code (for example via PowerShell)
  • Lookalike or unfamiliar domains for popular tools/utilities
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Read the video transcript

A verified HBO Max account on Reddit sounds safe, right? That’s exactly what was used to push malware. Attackers hijacked that verified ad account and ran 108 malicious ads in 48 hours, sending people to fake HBO Max and AI-tool sites using a trick called ClickFix. The page tells you: 'To verify your browser, paste this command into PowerShell or Terminal.' That’s ClickFix, getting you to run their malware command yourself. If any ad or site tells you to paste a command into PowerShell or Terminal, stop. Take a screenshot and send it to IT or Security, do not run it.

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