splunk-security_content/docs/_posts/2020-07-27-aws_detect_permanent_key_creation.md

title, excerpt, categories, last_modified_at, toc, toc_label, tags

title	excerpt	categories	last_modified_at	toc	toc_label	tags
aws detect permanent key creation	Valid Accounts	Cloud	2020-07-27	true		Valid Accounts Defense Evasion Persistence Privilege Escalation Initial Access Splunk Enterprise Splunk Enterprise Security Splunk Cloud

⚠️ WARNING THIS IS A EXPERIMENTAL DETECTION

We have not been able to test, simulate, or build datasets for this detection. 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
• Datamodel:
• Last Updated: 2020-07-27
• Author: Rod Soto, Splunk
• ID: 12d6d713-3cb4-4ffc-a064-1dca3d1cca01

ATT&CK

ID	Technique	Tactic
T1078	Valid Accounts	Defense Evasion, Persistence, Privilege Escalation, Initial Access

Search

`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`

Associated Analytic Story

• AWS Cross Account Activity

How To Implement

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

Required field

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

Kill Chain Phase

• Lateral Movement

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.

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

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