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Description

This search detects the creation of a new Federation setting by alerting about an specific event related to its creation.

  • Type: TTP
  • Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud

  • Last Updated: 2022-02-03
  • Author: Rod Soto, Splunk
  • ID: 1668812a-6047-11eb-ae93-0242ac130002

Annotations

ATT&CK

ATT&CK

ID Technique Tactic
T1136.003 Cloud Account Persistence
T1136 Create Account Persistence
Kill Chain Phase
  • Exploitation
NIST
CIS20
CVE
1
2
3
4
5
`o365_management_activity` Workload=AzureActiveDirectory Operation="Add service principal credentials." 
| stats min(_time) as firstTime max(_time) as lastTime values(Actor{}.ID) as Actor.ID values(ModifiedProperties{}.Name) as ModifiedProperties.Name values(ModifiedProperties{}.NewValue) as ModifiedProperties.NewValue values(Target{}.ID) as Target.ID by ActorIpAddress Operation 
| `security_content_ctime(firstTime)`
| `security_content_ctime(lastTime)` 
| `o365_added_service_principal_filter`

Macros

The SPL above uses the following Macros:

:information_source: o365_added_service_principal_filter is a empty macro by default. It allows the user to filter out any results (false positives) without editing the SPL.

Required fields

List of fields required to use this analytic.

  • _time
  • Workload
  • signature
  • Actor{}.ID
  • ModifiedProperties{}.Name
  • ModifiedProperties{}.NewValue
  • Target{}.ID
  • ActorIpAddress

How To Implement

You must install splunk Microsoft Office 365 add-on. This search works with o365:management:activity

Known False Positives

The creation of a new Federation is not necessarily malicious, however these events need to be followed closely, as it may indicate federated credential abuse or backdoor via federated identities at a different cloud provider.

Associated Analytic Story

RBA

Risk Score Impact Confidence Message
42.0 70 60 User $Actor.ID$ created a new federation setting on $Target.ID$ and added service principal credentials from IP Address $ActorIpAddress$

:information_source: The Risk Score is calculated by the following formula: Risk Score = (Impact * Confidence/100). Initial Confidence and Impact is set by the analytic author.

Reference

Test Dataset

Replay any dataset to Splunk Enterprise by using our replay.py tool or the UI. Alternatively you can replay a dataset into a Splunk Attack Range

source | version: 1