IMPORTANT: No additional bug fixes or documentation updates will be released for this version. For the latest information, see the current release documentation.

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Azure Resource Group Deletion

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Azure Resource Group Deletion

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Identifies the deletion of a resource group in Azure, which includes all resources within the group. Deletion is permanent and irreversible. An adversary may delete a resource group in an attempt to evade defenses or intentionally destroy data.

Rule type: query

Rule indices:

filebeat-*
logs-azure*

Severity: medium

Risk score: 47

Runs every: 5 minutes

Searches indices from: now-25m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100

References:

https://docs.microsoft.com/en-us/azure/azure-resource-manager/management/manage-resource-groups-portal

Tags:

Elastic
Cloud
Azure
Continuous Monitoring
SecOps
Log Auditing

Version: 7 (version history)

Added (Elastic Stack release): 7.10.0

Last modified (Elastic Stack release): 8.4.0

Rule authors: Elastic

Rule license: Elastic License v2

Potential false positives

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Deletion of a resource group may be done by a system or network administrator. Verify whether the username, hostname, and/or resource name should be making changes in your environment. Resource group deletions from unfamiliar users or hosts should be investigated. If known behavior is causing false positives, it can be exempted from the rule.

Investigation guide

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Rule query

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event.dataset:azure.activitylogs and azure.activitylogs.operation_name
:"MICROSOFT.RESOURCES/SUBSCRIPTIONS/RESOURCEGROUPS/DELETE" and
event.outcome:(Success or success)

Threat mapping

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Framework: MITRE ATT&CK^TM

Tactic:
- Name: Impact
- ID: TA0040
- Reference URL: https://attack.mitre.org/tactics/TA0040/
Technique:
- Name: Data Destruction
- ID: T1485
- Reference URL: https://attack.mitre.org/techniques/T1485/
Tactic:
- Name: Defense Evasion
- ID: TA0005
- Reference URL: https://attack.mitre.org/tactics/TA0005/
Technique:
- Name: Impair Defenses
- ID: T1562
- Reference URL: https://attack.mitre.org/techniques/T1562/

Rule version history

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Version 7 (8.4.0 release)

Formatting only

Version 5 (7.13.0 release)

Formatting only

Version 4 (7.12.0 release)

Updated query, changed from:

event.dataset:azure.activitylogs and azure.activitylogs.operation_name
:MICROSOFT.RESOURCES/SUBSCRIPTIONS/RESOURCEGROUPS/DELETE and
event.outcome:(Success or success)

Version 3 (7.11.2 release)

Formatting only

Version 2 (7.11.0 release)

Updated query, changed from:

event.dataset:azure.activitylogs and azure.activitylogs.operation_name
:MICROSOFT.RESOURCES/SUBSCRIPTIONS/RESOURCEGROUPS/DELETE and
event.outcome:Success

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