#10
BleepingComputer
general
July 30, 2026 at 15:56 UTC
Microsoft Teams vishing attacks lead to Chaos ransomware attacks
By Lawrence Abrams
AI Summary
Threat actors impersonating IT support staff in Microsoft Teams voice calls are gaining remote access to corporate endpoints and deploying Chaos ransomware against North American organizations in an active vishing campaign. The attack chain abuses Teams' external communication features to socially engineer employees into granting remote desktop access. Security teams should restrict Teams external call permissions, enforce MFA on remote access tools, and brief helpdesk staff on vishing tactics targeting corporate users.
Relevance score: 78.0/100
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