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A Two-Minute Microsoft Teams Call Could End With Your Network Encrypted With Ransomware

Cybersecurity NewsJuly 30, 20265 min read

A short Microsoft Teams call can now become the first step in a ransomware attack. Attackers posing as IT support staff are persuading employees to grant remote access, then using that foothold to spread through networks and deploy Chaos ransomware. The campaign, tracked as STAC4749, targeted dozens of North American organizations between February and June […] The post A Two-Minute Microsoft Teams Call Could End With Your Network Encrypted With Ransomware appeared first on Cyber Security News.

A short Microsoft Teams call can now become the first step in a ransomware attack. Attackers posing as IT support staff are persuading employees to grant remote access, then using that foothold to spread through networks and deploy Chaos ransomware. The campaign, tracked as STAC4749, targeted dozens of North American organizations between February and June 2026. Most fraudulent calls lasted only two to two-and-a-half minutes, showing how quickly social engineering can lead…

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