THIS IS A EXPERIMENTAL DETECTION
This detection has been marked experimental by the Splunk Threat Research team. This means we have not been able to test, simulate, or build datasets for this detection. Use at your own risk. This analytic is NOT supported.
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
- Last Updated: 2020-07-27
- Author: Rod Soto, Splunk
- ID: 88fc31dd-f331-448c-9856-d3d51dd5d3a1
Kill Chain Phase
1 2 3 4 `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`
The SPL above uses the following Macros:
aws_detect_attach_to_role_policy_filter is a empty macro by default. It allows the user to filter out any results (false positives) without editing the SPL.
List of fields required to use this analytic.
How To Implement
You must install splunk AWS add-on and Splunk App for AWS. This search works with cloudwatch logs
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.
Associated Analytic Story
The Risk Score is calculated by the following formula: Risk Score = (Impact * Confidence/100). Initial Confidence and Impact is set by the analytic author.
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