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Chaos in Teams vishing
July 28, 2026 · Sophos Threat Research · Severity: CRITICAL
Sophos Threat Research describes a vishing campaign using Microsoft Teams to deliver Chaos ransomware. Attackers combine social engineering with custom malware and remote access tools to gain initial access and deploy ransomware. This highlights the evolving threat of voice phishing in collaboration platforms.
Key Takeaways
- Attackers use Microsoft Teams vishing to initiate ransomware attacks.
- Custom malware and remote access tools enable persistence and deployment.
- Chaos ransomware variant delivered via social engineering in Teams.