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We have not been able to test, simulate or build datasets for it, use at your own risk!

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Description

This search provides detection of an user attaching itself to a different role trust policy. This can be used for lateral movement and escalation of privileges.

  • Type: Hunting
  • Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
  • Datamodel:
  • Last Updated: 2020-07-27
  • Author: Rod Soto, Splunk
  • ID: 88fc31dd-f331-448c-9856-d3d51dd5d3a1

ATT&CK

ID Technique Tactic
T1078 Valid Accounts Defense Evasion, Persistence, Privilege Escalation, Initial Access
`aws_cloudwatchlogs_eks` attach policy
| spath requestParameters.policyArn 
| table sourceIPAddress user_access_key userIdentity.arn userIdentity.sessionContext.sessionIssuer.arn eventName errorCode errorMessage status action requestParameters.policyArn userIdentity.sessionContext.attributes.mfaAuthenticated userIdentity.sessionContext.attributes.creationDate  
| `aws_detect_attach_to_role_policy_filter`

Associated Analytic Story

How To Implement

You must install splunk AWS add-on and Splunk App for AWS. This search works with cloudwatch logs

Required field

  • _time
  • requestParameters.policyArn

Kill Chain Phase

  • Lateral Movement

Known False Positives

Attach to policy can create a lot of noise. This search can be adjusted to provide specific values to identify cases of abuse (i.e status=failure). The search can provide context for common users attaching themselves to higher privilege policies or even newly created policies.

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