Malvertising Attack Tricks macOS Users with Fake Homebrew Site, Installs AMOS Infostealer

January 22, 2025
Malvertising Attack Tricks macOS Users with Fake Homebrew Site, Installs AMOS Infostealer
  • To protect against similar attacks, users should verify website URLs and avoid installing software from unfamiliar sources.

  • A recent malvertising campaign has targeted macOS users by leading them to a fraudulent Homebrew site, 'brewe.sh', which closely resembles the legitimate site 'brew.sh'.

  • AMOS is a powerful infostealer designed to capture sensitive information, including login credentials and cryptocurrency details.

  • Security researchers have been warning about AMOS for several months, highlighting its subscription model that costs cybercriminals $1,000 per month.

  • Mike McQuaid, Homebrew's project leader, criticized Google for its inadequate oversight in preventing such scams, despite the removal of the malicious ad.

  • Victims of this scam are misled into executing a command that appears to install Homebrew, but instead, they inadvertently download the AMOS malware.

  • Users who clicked on the malicious ad were tricked into downloading AmosStealer, which is specifically designed for macOS.

  • Cybersecurity experts recommend that users avoid sponsored links and instead bookmark official websites to mitigate risks associated with such attacks.

  • Although Google has taken down the harmful ads, questions remain about how the threat actors managed to bypass Google's crawlers to display the fake Homebrew URL.

  • The campaign utilized Google advertisements to promote the fraudulent Homebrew site, taking advantage of the platform's vast reach.

  • Malwarebytes reported that thousands of Google customers worldwide might have been affected by this broader malvertising campaign.

  • Following the alert about the campaign, McQuaid confirmed that the malicious operation has been taken down, but he expressed concerns about the frequency of these incidents.

Summary based on 3 sources


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