Microsoft 365 Portal Logins from Impossible Travel Locations

edit

Microsoft 365 Portal Logins from Impossible Travel Locations

edit

Detects successful Microsoft 365 portal logins from impossible travel locations. Impossible travel locations are defined as two different countries within a short time frame. This behavior may indicate an adversary attempting to access a Microsoft 365 account from a compromised account or a malicious actor attempting to access a Microsoft 365 account from a different location.

Rule type: threshold

Rule indices:

filebeat-*
logs-o365.audit-*

Severity: medium

Risk score: 47

Runs every: 5m

Searches indices from: now-15m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100

References:

https://www.huntress.com/blog/time-travelers-busted-how-to-detect-impossible-travel-

Tags:

Domain: Cloud
Data Source: Microsoft 365
Use Case: Threat Detection
Tactic: Initial Access

Version: 1

Rule authors:

Elastic

Rule license: Elastic License v2

Rule query

edit

event.dataset: "o365.audit"
    and event.provider: "AzureActiveDirectory"
    and event.action: "UserLoggedIn"
    and event.outcome: "success"

Framework: MITRE ATT&CK^TM

Tactic:
- Name: Initial Access
- ID: TA0001
- Reference URL: https://attack.mitre.org/tactics/TA0001/
Technique:
- Name: Valid Accounts
- ID: T1078
- Reference URL: https://attack.mitre.org/techniques/T1078/
Sub-technique:
- Name: Cloud Accounts
- ID: T1078.004
- Reference URL: https://attack.mitre.org/techniques/T1078/004/

« Azure Entra Sign-in Brute Force Microsoft 365 Accounts by Repeat Source Microsoft 365 Portal Login from Rare Location »