Microsoft 365 Impossible Travel Sign-ins Reported as Successful

Alerts on successful Microsoft 365 “Impossible travel activity” events in SecurityComplianceCenter telemetry.

FreeReviewedSigma · Medium · v4

Product: m365
Service: threat_management
Author: Austin Songer @austinsonger (SigmaHQ), DRL 1.1
Published: 2020-07-06
Updated: 2026-07-31

ATT&CK techniques

Initial Access → Defense Evasion

Recon
Resource Dev
Initial Access
- T1078Valid Accounts
Execution
Persistence
- T1078Valid Accounts
Priv Esc
- T1078Valid Accounts
Defense Evasion
- T1078Valid Accounts
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule flags successful “Impossible travel activity” events reported in Microsoft Cloud App Security via SecurityComplianceCenter. Attackers may leverage compromised accounts and rapidly move between geographies, so impossible-travel detections can surface stealthy sign-in patterns that violate expected travel time. It relies on threat management telemetry from Microsoft 365 that records the event source, event name, and success status.

Reporting behind it

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Microsoft 365 Impossible Travel Sign-ins Reported as Successful

Pivot detection · T1078 · 9 related

Changelog

v4
Candidate ingested via manual entry.2026-07-31
v3
Candidate ingested via manual entry.2026-07-31
v2
Candidate ingested via manual entry.2026-07-31
v1
No changelog recorded for this version.2026-07-30

Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.

microsoft-365-impossible-travel-activity-via-securitycompliancecenter-successful-d7eab125

title: Microsoft 365 Impossible Travel Sign-ins Reported as Successful
id: 984d40ec-5b64-498d-bb4a-436d61e172ff
status: test
description: This rule flags successful “Impossible travel activity” events reported in Microsoft Cloud App Security via SecurityComplianceCenter. Attackers may leverage compromised accounts and rapidly move between geographies, so impossible-travel detections can surface stealthy sign-in patterns that violate expected travel time. It relies on threat management telemetry from Microsoft 365 that records the event source, event name, and success status.
references:
  - https://learn.microsoft.com/en-us/defender-cloud-apps/anomaly-detection-policy
  - https://learn.microsoft.com/en-us/defender-cloud-apps/policy-template-reference
  - https://github.com/SigmaHQ/sigma/blob/master/rules/cloud/m365/threat_management/microsoft365_impossible_travel_activity.yml
author: Austin Songer @austinsonger, Huntrule Team
date: 2020-07-06
modified: 2021-11-27
tags:
  - attack.privilege-escalation
  - attack.persistence
  - attack.initial-access
  - attack.stealth
  - attack.t1078
logsource:
  service: threat_management
  product: m365
detection:
  selection:
    eventSource: SecurityComplianceCenter
    eventName: Impossible travel activity
    status: success
  condition: selection
falsepositives:
  - Unknown
level: medium
license: DRL-1.1
related:
  - id: d7eab125-5f94-43df-8710-795b80fa1189
    type: derived

Convert

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