The Hacker News
04 Jun 2026
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FlutterShell Backdoor Spreads to macOS via Malicious Google and YouTube Ads
Cybersecurity researchers have shed light on a macOS malvertising campaign codenamed Operation FlutterBridge that spreads a new backdoor called FlutterShell.
According to Palo Alto Networks Unit 42, the campaign is said to be the next stage of a previously reported activity cluster dubbed JSCoreRunner (aka FileRipple) in late August 2025. The cybercrime group behind the two attack chains is