Critical

Fake Claude app promoted by Bing ads pushes SectopRAT malware

BleepingComputer

July 23, 2026 at 7:48 PM

Actively Exploited

Overview

A recent malvertising campaign on Bing is promoting a fake desktop application that masquerades as the Claude AI tool. This fake installer is hosted on a legitimate domain for Claude.ai and is designed to deliver a malware known as SectopRAT. Users searching for Claude on Bing may unknowingly download this malicious software, which can compromise their systems. The presence of such malware poses risks not only to individual users but can also affect organizations if their employees inadvertently install it on work devices. Cybersecurity experts are urging users to be cautious when downloading software from search engine ads, as this incident illustrates the potential dangers of malvertising.

Key Takeaways

Active Exploitation: This vulnerability is being actively exploited by attackers. Immediate action is recommended.
Affected Systems: Fake Claude desktop app, SectopRAT malware
Action Required: Users should avoid downloading applications from search engine ads and verify software sources before installation.
Timeline: Newly disclosed

Original Article Summary

A malvertising campaign on the Bing search service is pushing a fake Claude desktop app installer hosted on a legitimate Claude.ai domain to deliver the SectopRAT malware. [...]

Impact

Fake Claude desktop app, SectopRAT malware

Exploitation Status

This vulnerability is confirmed to be actively exploited by attackers in real-world attacks. Organizations should prioritize patching or implementing workarounds immediately.

Timeline

Newly disclosed

Remediation

Users should avoid downloading applications from search engine ads and verify software sources before installation. Implementing security software that detects and blocks malware can also help.

Additional Information

This threat intelligence is aggregated from trusted cybersecurity sources. For the most up-to-date information, technical details, and official vendor guidance, please refer to the original article linked below.

Related Topics: This incident relates to Malware.

Read Original Article

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