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Hackers abuse Google Ads, Bing redirects to push Claude ClickFix attacks

bleepingcomputer.com30 points8 comments
Screenshot of Hackers abuse Google Ads, Bing redirects to push Claude ClickFix attacks

Hackers are abusing legitimate Bing click-tracking redirects embedded in Google Ads to push fake Claude installers that execute ClickFix attacks. Security researchers labeled the technique "Adception." A sponsored Google ad points to bing.com/ck/a, which forwards users to a compromised WordPress retailer site and then to a fake claude-desk-code.com download page. Because the visible ad destination is bing.com, the ad bypasses advertising security checks and appears trustworthy. Bing's JavaScript-based click tracking lets attackers forward users while making the traffic look like it originates from Bing.

The operation uses multi-layer cloaking: the compromised WordPress site checks for a Bing referrer and specific headers before redirecting, and the fake Claude page verifies arrival from Google or Bing and returns a 404 to direct visitors or scanners. The fake installer displays Anthropic’s legitimate curl command, but the copy button places a malicious Base64-decoded command into the clipboard that fetches a .dat file from an attacker server (lake-90.com) and pipes it to zsh for execution. Researchers tied multiple domains with an identical macOS installer pattern to a ClickFix toolkit tracked as AcSig; the final payload remains unknown, but the campaign creates a covert, ad-driven macOS execution vector that evades normal scanning and trust signals.

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