Hackers Use Malicious Ads to Deliver FlutterShell Backdoor on macOS Systems

Cybersecuritynews •Tushar Subhra Dutta • June 4, 2026

A new and rapidly spreading malware campaign is putting macOS users at serious risk. Threat actors are using Google Ads to push fake desktop applications that secretly install a powerful backdoor on infected machines. The campaign, dubbed Operation FlutterBridge, marks a sharp escalation in tactics from financially motivated attackers who have been active since at […]

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This article is one source in a clustered incident — the cluster page carries the summary, timeline and every other outlet covering it.

Malicious Ads Distribute FlutterShell Backdoor to macOS Users A new malware campaign, dubbed Operation FlutterBridge, is targeting macOS users by distributing a backdoor known as FlutterShell through malicious ads. Hackers are using Google Ads to promote fake desktop applications that install the backdoor on infected systems. This campaign is attributed to a cluster identified as CL-CRI-1089 and represents a significant escalation in tactics employed by financially motivated attackers. The operation is currently active and poses a serious risk to macOS users, with researchers warning about the rapid spread of this malware. Specific numbers and CVEs are not detailed in the articles, but the scale of the campaign indicates a widespread impact on users who may unknowingly download these malicious applications. 3 sources 66

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Hackers Use Malicious Ads to Deliver FlutterShell Backdoor on macOS Systems

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Extracted Entities

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Malware (1)

Platforms (2)