WARNING THIS IS A EXPERIMENTAL object

We have not been able to test, simulate, or build datasets for this object. Use at your own risk. This analytic is NOT supported.

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Description

This search provides detection of accounts creating permanent keys. Permanent keys are not created by default and they are only needed for programmatic calls. Creation of Permanent key is an important event to monitor.

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

  • Last Updated: 2020-07-27
  • Author: Rod Soto, Splunk
  • ID: 12d6d713-3cb4-4ffc-a064-1dca3d1cca01

Annotations

ATT&CK
ID Technique Tactic
T1078 Valid Accounts Defense Evasion, Initial Access, Persistence, Privilege Escalation
Kill Chain Phase
  • Exploitation
NIST
CIS20
CVE
1
2
3
4
5
`aws_cloudwatchlogs_eks` CreateAccessKey 
| spath eventName 
| search eventName=CreateAccessKey "userIdentity.type"=IAMUser 
| table sourceIPAddress userName userIdentity.type userAgent action status responseElements.accessKey.createDate responseElements.accessKey.status responseElements.accessKey.accessKeyId 
|`aws_detect_permanent_key_creation_filter`

Macros

The SPL above uses the following Macros:

Note that aws_detect_permanent_key_creation_filter is a empty macro by default. It allows the user to filter out any results (false positives) without editing the SPL.

Required field

  • _time
  • eventName
  • userIdentity.type
  • sourceIPAddress
  • userName userIdentity.type
  • userAgent
  • action
  • status
  • responseElements.accessKey.createDate
  • esponseElements.accessKey.status
  • responseElements.accessKey.accessKeyId

How To Implement

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

Known False Positives

Not all permanent key creations are malicious. If there is a policy of rotating keys this search can be adjusted to provide better context.

Associated Analytic story

RBA

Risk Score Impact Confidence Message
25.0 50 50 tbd

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