Microsoft Teams and QuickAssist Exploited in New Vishing Attack to Spread .NET Malware

Cyberpress • December 9, 2025

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This attack demonstrates how cybercriminals are combining social engineering with advanced technical manipulation to bypass modern security controls.

The full story

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

Vishing Attack Uses Microsoft Teams and QuickAssist to Spread .NET Malware A new vishing attack has been identified that exploits Microsoft Teams and QuickAssist to deploy .NET malware. This attack targets users through social engineering tactics, potentially affecting organizations that utilize these platforms. The malware is designed to compromise systems and steal sensitive information. 3 sources 43

Extracted Entities

Attack Types (2)

Malware Phishing

Tools (2)

Microsoft Teams QuickAssist