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Detection rules › Sigma

Role Assignment Created

Status
test
Severity
informational
Log source
product azure, service activitylogs
Author
Fukusuke Takahashi
Source
github.com/Yamato-Security/suzaku-rules

Creates role assignment.

MITRE ATT&CK coverage

TacticTechniques
Privilege EscalationNo specific technique

Telemetry coverage

PlatformRecord / event type
AzureActivity Log event Microsoft.Authorization/roleAssignments/write: Create a role assignment at the specified scope.

Rule body

title: Role Assignment Created
id: c3425eff-76ea-42f5-8874-aeaa30d499fb
status: test
description:
    Creates role assignment.
references:
    - https://learn.microsoft.com/en-us/azure/role-based-access-control/change-history-report#interpret-a-log-entry
author: Fukusuke Takahashi
date: 2025-12-02
tags:
    - attack.privilege-escalation
logsource:
    product: azure
    service: activitylogs
detection:
    selection:
        operationName: MICROSOFT.AUTHORIZATION/ROLEASSIGNMENTS/WRITE
        properties.statusCode: Created
    condition: selection
falsepositives:
level: informational

Stages and Predicates

Stage 0: condition

selection

Stage 1: selection

selection:
    operationName: MICROSOFT.AUTHORIZATION/ROLEASSIGNMENTS/WRITE
    properties.statusCode: Created

Indicators

These rows show field, operator, and value matches.

FieldKindValuesSearch
operationNameeq
  • MICROSOFT.AUTHORIZATION/ROLEASSIGNMENTS/WRITE
field:"operationName" kind:eq value:"MICROSOFT.AUTHORIZATION/ROLEASSIGNMENTS/WRITE"
properties.statusCodeeq
  • Created
field:"properties.statusCode" kind:eq value:"Created"