Azure Entra riskdetection: SuspiciousIPAddress sign-in from known malicious IP

title: "Azure Entra riskdetection: SuspiciousIPAddress sign-in from known malicious IP"
id: bbd583a0-411c-41e0-b236-96da821243d0
status: test
description: This rule flags Azure sign-in risk events where the risk event type is set to suspiciousIPAddress, indicating the sign-in originated from an IP address known to be malicious at the time of the event. Attackers often use compromised infrastructure or bot networks, so malicious-IP-tagged sign-ins can indicate credential theft or account takeover attempts. The detection relies on Azure Entra riskdetection telemetry that records the riskEventType for the sign-in.
references:
  - https://learn.microsoft.com/en-us/entra/id-protection/concept-identity-protection-risks#malicious-ip-address
  - https://learn.microsoft.com/en-us/entra/architecture/security-operations-user-accounts#unusual-sign-ins
  - https://github.com/SigmaHQ/sigma/blob/master/rules/cloud/azure/identity_protection/azure_identity_protection_malicious_ip_address_suspicious.yml
author: Mark Morowczynski '@markmorow', Gloria Lee, '@gleeiamglo', Huntrule Team
date: 2023-09-07
tags:
  - attack.t1090
  - attack.command-and-control
logsource:
  product: azure
  service: riskdetection
detection:
  selection:
    riskEventType: suspiciousIPAddress
  condition: selection
falsepositives:
  - We recommend investigating the sessions flagged by this detection in the context of other sign-ins from the user.
level: high
license: DRL-1.1
related:
  - id: 36440e1c-5c22-467a-889b-593e66498472
    type: derived