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102 lines
3.7 KiB
Markdown
102 lines
3.7 KiB
Markdown
---
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title: "AWS CreateAccessKey"
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excerpt: "Cloud Account, Create Account"
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categories:
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- Cloud
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last_modified_at: 2021-07-19
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toc: true
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toc_label: ""
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tags:
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- Cloud Account
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- Persistence
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- Create Account
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- Persistence
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- Splunk Security Analytics for AWS
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- Splunk Enterprise
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- Splunk Enterprise Security
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- Splunk Cloud
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---
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[Try in Splunk Security Cloud](https://www.splunk.com/en_us/cyber-security.html){: .btn .btn--success}
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#### Description
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This search looks for AWS CloudTrail events where a user A who has already permission to create access keys, makes an API call to create access keys for another user B. Attackers have been know to use this technique for Privilege Escalation in case new victim(user B) has more permissions than old victim(user B)
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- **Type**: Hunting
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- **Product**: Splunk Security Analytics for AWS, Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
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- **Datamodel**:
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- **Last Updated**: 2021-07-19
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- **Author**: Bhavin Patel, Splunk
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- **ID**: 2a9b80d3-6340-4345-11ad-212bf3d0d111
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#### [ATT&CK](https://attack.mitre.org/)
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| ID | Technique | Tactic |
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| ----------- | ----------- |--------------- |
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| [T1136.003](https://attack.mitre.org/techniques/T1136/003/) | Cloud Account | Persistence |
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| [T1136](https://attack.mitre.org/techniques/T1136/) | Create Account | Persistence |
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#### Search
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```
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`cloudtrail` eventName = CreateAccessKey userAgent !=console.amazonaws.com errorCode = success
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| search userIdentity.userName!=requestParameters.userName
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| stats count min(_time) as firstTime max(_time) as lastTime by requestParameters.userName src eventName eventSource aws_account_id errorCode userAgent eventID awsRegion userIdentity.principalId user_arn
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| `security_content_ctime(firstTime)`
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| `security_content_ctime(lastTime)`
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|`aws_createaccesskey_filter`
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```
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#### Associated Analytic Story
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* [AWS IAM Privilege Escalation](/stories/aws_iam_privilege_escalation)
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#### How To Implement
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You must install splunk AWS add on and Splunk App for AWS. This search works with AWS CloudTrail logs.
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#### Required field
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* _time
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* eventName
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* userAgent
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* errorCode
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* requestParameters.userName
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#### Kill Chain Phase
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* Actions on Objectives
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#### Known False Positives
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While this search has no known false positives, it is possible that an AWS admin has legitimately created keys for another user.
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#### RBA
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| Risk Score | Impact | Confidence | Message |
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| ----------- | ----------- |--------------|--------------|
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| 63.0 | 70 | 90 | User $user_arn$ is attempting to create access keys for $requestParameters.userName$ from this IP $src$ |
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#### Reference
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* [https://labs.bishopfox.com/tech-blog/privilege-escalation-in-aws](https://labs.bishopfox.com/tech-blog/privilege-escalation-in-aws)
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* [https://rhinosecuritylabs.com/aws/aws-privilege-escalation-methods-mitigation-part-2/](https://rhinosecuritylabs.com/aws/aws-privilege-escalation-methods-mitigation-part-2/)
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#### Test Dataset
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Replay any dataset to Splunk Enterprise by using our [`replay.py`](https://github.com/splunk/attack_data#using-replaypy) tool or the [UI](https://github.com/splunk/attack_data#using-ui).
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Alternatively you can replay a dataset into a [Splunk Attack Range](https://github.com/splunk/attack_range#replay-dumps-into-attack-range-splunk-server)
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* [https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1078/aws_createaccesskey/aws_cloudtrail_events.json](https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1078/aws_createaccesskey/aws_cloudtrail_events.json)
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[*source*](https://github.com/splunk/security_content/tree/develop/detections/cloud/aws_createaccesskey.yml) \| *version*: **2** |