Azure New CloudShell Created — Sigma Rule

Rule metadata and linked tags

Author: Austin Songer. Source status: test; severity: medium. Source dates: 2021-09-21 / 2022-08-23.

{
  "product": "azure",
  "service": "activitylogs"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: f16f35a64b57eea73f9cca12d76e5e97ac215c24a4d33acfc68295135147ce8c

Detection logic

Original source YAML. Source-tag agreement is not proof of complete semantic coverage. This rule has not been compiled for a SIEM backend or validated against live telemetry here.

title: Azure New CloudShell Created
id: 72af37e2-ec32-47dc-992b-bc288a2708cb
status: test
description: Identifies when a new cloudshell is created inside of Azure portal.
references:
    - https://learn.microsoft.com/en-us/azure/role-based-access-control/resource-provider-operations
author: Austin Songer
date: 2021-09-21
modified: 2022-08-23
tags:
    - attack.execution
    - attack.t1059
logsource:
    product: azure
    service: activitylogs
detection:
    selection:
        operationName: MICROSOFT.PORTAL/CONSOLES/WRITE
    condition: selection
falsepositives:
    - A new cloudshell may be created by a system administrator.
level: medium

Original YAML and metadata in JSON

False positives

• A new cloudshell may be created by a system administrator.

Source references

• https://learn.microsoft.com/en-us/azure/role-based-access-control/resource-provider-operations