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Operation FlutterBridge: macOS Malvertising Campaign Spreads New FlutterShell Backdoor

·Source: Unit 42 (Palo Alto)

Updated:

Executive Summary

Operation FlutterBridge is a malvertising campaign targeting macOS users. It distributed the new backdoor FlutterShell, built using the Flutter framework. The post Operation FlutterBridge: macOS Malvertising Campaign Spreads New FlutterShell Backdoor appeared first on Unit 42 .

Analysis

Operation FlutterBridge is a malvertising campaign targeting macOS users. It distributed the new backdoor FlutterShell, built using the Flutter framework. The post Operation FlutterBridge: macOS Malvertising Campaign Spreads New FlutterShell Backdoor appeared first on Unit 42 .
Source Attribution

Originally published by Unit 42 (Palo Alto) on Jun 2, 2026.

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