Microsoft 365 Cloud Apps: Successful login from a risky IP address

Alerts on successful sanctioned-app logons from risky IP addresses reported in M365 SecurityComplianceCenter.

FreeReviewedSigma · Medium · v4

Product: m365
Service: threat_management
Author: Austin Songer @austinsonger (SigmaHQ), DRL 1.1
Published: 2021-08-23
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 sign-ins to your sanctioned Microsoft apps when Microsoft Cloud App Security reports the source IP as risky. Attackers often use anomalous or higher-risk network origins to blend in or route around access controls, so monitoring these events helps identify suspicious access patterns. It relies on threat management telemetry from the SecurityComplianceCenter reporting the specific event name and successful status.

Reporting behind it

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Microsoft 365 Cloud Apps: Successful login from a risky IP address

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.

m365-securitycompliancecenter-successful-logon-from-risky-ip-address-in-sanction-c191e2fa

title: "Microsoft 365 Cloud Apps: Successful login from a risky IP address"
id: 88c9c28e-792b-4bcc-b403-7937eb56ffc9
status: test
description: This rule flags successful sign-ins to your sanctioned Microsoft apps when Microsoft Cloud App Security reports the source IP as risky. Attackers often use anomalous or higher-risk network origins to blend in or route around access controls, so monitoring these events helps identify suspicious access patterns. It relies on threat management telemetry from the SecurityComplianceCenter reporting the specific event name and successful 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_logon_from_risky_ip_address.yml
author: Austin Songer @austinsonger, Huntrule Team
date: 2021-08-23
modified: 2022-10-09
tags:
  - attack.privilege-escalation
  - attack.persistence
  - attack.initial-access
  - attack.stealth
  - attack.t1078
logsource:
  service: threat_management
  product: m365
detection:
  selection:
    eventSource: SecurityComplianceCenter
    eventName: Log on from a risky IP address
    status: success
  condition: selection
falsepositives:
  - Unknown
level: medium
license: DRL-1.1
related:
  - id: c191e2fa-f9d6-4ccf-82af-4f2aba08359f
    type: derived

Convert

This rule as a query you can run. Uses no unlock credit.

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