Azure Entra Risk Detection: SuspiciousIPAddress Sign-In From Malicious IP

Alerts on Azure Entra sign-in risk events marked suspiciousIPAddress, suggesting origin from a known malicious IP.

FreeReviewedSigma · High · v5

Product: azure
Service: riskdetection
Author: Mark Morowczynski '@markmorow', Gloria Lee, '@gleeiamglo' (SigmaHQ), DRL 1.1
Published: 2023-09-07
Updated: 2026-07-31

ATT&CK techniques

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
- T1090Proxy
Exfiltration
Impact

What it detects

This rule flags sign-in risk events where the risk event type is suspiciousIPAddress, indicating the sign-in originated from an IP address considered malicious at the time of the event. Such alerts matter because attackers may reuse compromised infrastructure to access accounts while blending in with normal sign-in flows. The detection relies on Azure Entra risk event telemetry, specifically the risk event type associated with the sign-in risk record.

Reporting behind it

Related detections9 linkedT1090 — drag to rearrange

Malicious QDoor Remote Proxy Execution via WMIC Node Process Call Create of svhost from Temp (via process_creation)

Suspicious SOCKS Proxy Persistence via SystemBC PowerShell Run Key

Malicious Java Backdoor Execution from Public Documents via javaw (via process_creation)

Suspicious Proxyware Installation via accept-tos Flag on Linux

Suspicious DNS Query to Dynamic DNS and Tunneling Providers Abused by RATs

Malicious GenAI Browser Extension C2 and PAC Redirection (via proxy)

Malicious FRP Reverse Proxy Tunnel Identified by Hardcoded Token (via process_creation)

Suspicious SSH Reverse Tunnel Over DNS Port

Suspicious Chisel SOCKS Tunnel Command Line

Azure Entra Risk Detection: SuspiciousIPAddress Sign-In From Malicious IP

Pivot detection · T1090 · 9 related

Changelog

v5
Candidate ingested via manual entry.2026-07-31
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.

azure-entra-riskdetection-suspiciousipaddress-sign-in-from-known-malicious-ip-36440e1c

title: "Azure Entra Risk Detection: SuspiciousIPAddress Sign-In From Malicious IP"
id: bbd583a0-411c-41e0-b236-96da821243d0
status: test
description: This rule flags sign-in risk events where the risk event type is suspiciousIPAddress, indicating the sign-in originated from an IP address considered malicious at the time of the event. Such alerts matter because attackers may reuse compromised infrastructure to access accounts while blending in with normal sign-in flows. The detection relies on Azure Entra risk event telemetry, specifically the risk event type associated with the sign-in risk record.
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

Convert

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

SplunkSPL