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 Service Principal Credentials Added

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Azure Service Principal Credentials Added

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Identifies when new Service Principal credentials have been added in Azure. In most organizations, credentials will be added to service principals infrequently. Hijacking an application (by adding a rogue secret or certificate) with granted permissions will allow the attacker to access data that is normally protected by MFA requirements.

Rule type: query

Rule indices:

filebeat-*
logs-azure*

Severity: medium

Risk score: 47

Runs every: 10 minutes

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

Maximum alerts per execution: 100

References:

https://www.fireeye.com/content/dam/collateral/en/wp-m-unc2452.pdf

Tags:

Elastic
Cloud
Azure
Continuous Monitoring
SecOps
Identity and Access

Version: 100 (version history)

Added (Elastic Stack release): 7.14.0

Last modified (Elastic Stack release): 8.5.0

Rule authors: Elastic, Austin Songer

Rule license: Elastic License v2

Potential false positives

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Service principal credential additions 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. Credential additions 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.auditlogs and azure.auditlogs.operation_name:"Add
service principal credentials" 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: Resource Hijacking
- ID: T1496
- Reference URL: https://attack.mitre.org/techniques/T1496/

Rule version history

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Version 100 (8.5.0 release)

Formatting only

Version 4 (8.4.0 release)

Formatting only

Version 2 (8.2.0 release)

Updated query, changed from:

event.dataset:azure.auditlogs and azure.auditlogs.operation_name:"Add
service principal credentials." and event.outcome:(success or Success)

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