Azure Automation Webhook Created

calendar May 22, 2024 · Domain: Cloud Data Source: Azure Use Case: Configuration Audit Tactic: Persistence  ·
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Identifies when an Azure Automation webhook is created. Azure Automation runbooks can be configured to execute via a webhook. A webhook uses a custom URL passed to Azure Automation along with a data payload specific to the runbook. An adversary may create a webhook in order to trigger a runbook that contains malicious code.

Elastic rule (View on GitHub)

 1[metadata]
 2creation_date = "2020/08/18"
 3integration = ["azure"]
 4maturity = "production"
 5updated_date = "2024/05/21"
 6
 7[rule]
 8author = ["Elastic"]
 9description = """
10Identifies when an Azure Automation webhook is created. Azure Automation runbooks can be configured to execute via a
11webhook. A webhook uses a custom URL passed to Azure Automation along with a data payload specific to the runbook. An
12adversary may create a webhook in order to trigger a runbook that contains malicious code.
13"""
14from = "now-25m"
15index = ["filebeat-*", "logs-azure*"]
16language = "kuery"
17license = "Elastic License v2"
18name = "Azure Automation Webhook Created"
19note = """## Setup
20
21The Azure Fleet integration, Filebeat module, or similarly structured data is required to be compatible with this rule."""
22references = [
23    "https://powerzure.readthedocs.io/en/latest/Functions/operational.html#create-backdoor",
24    "https://github.com/hausec/PowerZure",
25    "https://posts.specterops.io/attacking-azure-azure-ad-and-introducing-powerzure-ca70b330511a",
26    "https://www.ciraltos.com/webhooks-and-azure-automation-runbooks/",
27]
28risk_score = 21
29rule_id = "e9ff9c1c-fe36-4d0d-b3fd-9e0bf4853a62"
30severity = "low"
31tags = ["Domain: Cloud", "Data Source: Azure", "Use Case: Configuration Audit", "Tactic: Persistence"]
32timestamp_override = "event.ingested"
33type = "query"
34
35query = '''
36event.dataset:azure.activitylogs and
37  azure.activitylogs.operation_name:
38    (
39      "MICROSOFT.AUTOMATION/AUTOMATIONACCOUNTS/WEBHOOKS/ACTION" or
40      "MICROSOFT.AUTOMATION/AUTOMATIONACCOUNTS/WEBHOOKS/WRITE"
41    ) and
42  event.outcome:(Success or success)
43'''

Setup

The Azure Fleet integration, Filebeat module, or similarly structured data is required to be compatible with this rule.

References

Related rules

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