Azure risk detection: anomalousToken risk events

Flags Azure Entra ID risk events indicating anomalous token lifetime or use from unfamiliar locations.

FreeReviewedSigma · High · v5

Product: azure
Service: riskdetection
Author: Mark Morowczynski '@markmorow' (SigmaHQ), DRL 1.1
Published: 2023-08-07
Updated: 2026-07-31

ATT&CK techniques

Cred Access

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
- T1528Steal Application Access Token
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule flags Azure risk detection events where the risk event type is anomalousToken. It indicates abnormal token characteristics such as an unusual token lifetime or a token used from an unfamiliar location, which can signal compromised credentials or risky authentication behavior. The detection relies on risk telemetry from Azure’s riskdetection service, specifically the riskEventType value.

Reporting behind it

Related detections9 linkedT1528 — drag to rearrange

Malicious OAuth Application Granted Full Mailbox and EWS Permissions (via m365)

Suspicious GAM OAuth Token Enumeration via Process Creation

Suspicious Entra ID Device Code Flow Authentication

Suspicious Delegated Permission Grant to Entra Agent Access Scope via Azure Audit Logs

Suspicious OAuth Application Registration with Localhost Reply URL via Azure AD

Malicious PRT Token Forging via AADInternals (via ps_script)

Possible VMware Workspace ONE SSRF via instanceHealth hostName At-Injection (via webserver)

Suspicious Entra Device Code Authentication with Office Client and Automated User Agent

Suspicious Access to Kubernetes Service Account Token via Curl or Wget (via process_creation)

Azure risk detection: anomalousToken risk events

Pivot detection · T1528 · 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-id-riskdetection-anomalous-token-risk-events-6555754e

title: "Azure risk detection: anomalousToken risk events"
id: 069d89e5-8379-49fa-8daf-b4f07ea39923
status: test
description: This rule flags Azure risk detection events where the risk event type is anomalousToken. It indicates abnormal token characteristics such as an unusual token lifetime or a token used from an unfamiliar location, which can signal compromised credentials or risky authentication behavior. The detection relies on risk telemetry from Azure’s riskdetection service, specifically the riskEventType value.
references:
  - https://learn.microsoft.com/en-us/entra/id-protection/concept-identity-protection-risks#anomalous-token
  - 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_anomalous_token.yml
author: Mark Morowczynski '@markmorow', Huntrule Team
date: 2023-08-07
tags:
  - attack.t1528
  - attack.credential-access
logsource:
  product: azure
  service: riskdetection
detection:
  selection:
    riskEventType: anomalousToken
  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: 6555754e-5e7f-4a67-ad1c-4041c413a007
    type: derived

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