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Microsoft Teams Booking-Flow Phishing: Detection & IOCs

Fake Teams booking pages hand attackers a device code on Microsoft's real login page: 9 detection rules, 9 IOCs and a free Splunk SPL rule.

Read the full threat intel for Microsoft Teams Booking-Flow Phishing: Detection & IOCs →

Chapters

  1. 0:00The hookFake Teams booking, real Microsoft login.
  2. 0:04The storyA typosquatted domain sent the lure.
  3. 0:11Attack pathA lookalike domain sent a fake booking.
  4. 0:26AttributionNo threat actor is attributed.
  5. 0:31Indicators of compromise5 indicators to hunt: 1 domain, 2 URLs and 2 paths.
  6. 0:37MITRE ATT&CK techniques12 ATT&CK techniques, from resource development to command and control.
  7. 0:42Remediation4 steps now: Revoke refresh tokens and sign-in sessions for any account.
  8. 0:50Detection rules9 detection rules, in SPL, KQL and Sigma.
Transcript

0:00Fake Teams booking, real Microsoft login.

0:05A typosquatted domain sent the lure.

0:07The victim pasted the code.

0:11A lookalike domain sent a fake booking.

0:14Google redirects led to the scheduler.

0:16The page showed a device code.

0:18A residential proxy completed the login.

0:21Then the session was replayed.

0:26No threat actor is attributed. Confidence: low.

0:315 indicators to hunt: 1 domain, 2 URLs and 2 paths.

0:3712 ATT&CK techniques, from resource development to command and control.

0:434 steps now: Revoke refresh tokens and sign-in sessions for any account.

0:519 detection rules, in SPL, KQL and Sigma.

0:56Threadlinqs. The unified security engineering platform.