Detection rules › Sigma

Logon from a Risky IP Address

Status
test
Severity
medium
Log source
product m365, service threat_management
Author
Austin Songer @austinsonger
Source
github.com/SigmaHQ/sigma

Detects when a Microsoft Cloud App Security reported when a user signs into your sanctioned apps from a risky IP address.

MITRE ATT&CK coverage

TacticTechniques
Initial Access
Persistence
Privilege Escalation
Stealth

Telemetry coverage

Rule body

title: Logon from a Risky IP Address
id: c191e2fa-f9d6-4ccf-82af-4f2aba08359f
status: test
description: Detects when a Microsoft Cloud App Security reported when a user signs into your sanctioned apps from a risky IP address.
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
author: Austin Songer @austinsonger
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

Stages and Predicates

Stage 0: condition

selection

Stage 1: selection

selection:
    eventSource: SecurityComplianceCenter
    eventName: 'Log on from a risky IP address'
    status: success

Indicators

These rows show field, operator, and value matches.