CTI · corroborated · 2026-09-21

Microsoft Teams Help Desk Impersonation Social Engineering Campaign

Full story & timeline

MITRE ATT&CK

• T1566 Phishing Initial Access
• T1534 Internal Spearphishing Lateral Movement
• T1656 Impersonation Stealth
• T1219 Remote Access Tools Command and Control

Indicators

No curated indicators tied to this case.

Detections

No detection content yet — case analysis did not yield signal-specific telemetry. Check back after the next daily CTI pass.

References

• https://expel.io