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56 lines
2.1 KiB
YAML
56 lines
2.1 KiB
YAML
name: AWS CreateAccessKey
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id: 2a9b80d3-6340-4345-11ad-212bf3d0d111
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version: 1
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date: '2021-03-02'
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author: Bhavin Patel, Splunk
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type: batch
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datamodel: []
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description: This search looks for CloudTrail events where a user A who has already
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permission to create access keys, makes an API call to create access keys for another
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user B. Attackers have been know to use this technique for Privilege Escalation
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in case new victim(user B) has more permissions than old victim(user B)
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search: '`cloudtrail` eventName = CreateAccessKey userAgent !=console.amazonaws.com
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errorCode = success| search userName!=requestParameters.userName | stats count
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min(_time) as firstTime max(_time) as lastTime by requestParameters.userName src
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eventName eventSource aws_account_id errorCode userAgent eventID awsRegion userIdentity.principalId
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user_arn | `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)`|`aws_createaccesskey_filter`'
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how_to_implement: You must install splunk AWS add on and Splunk App for AWS. This
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search works with cloudtrail logs.
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known_false_positives: While this search has no known false positives, it is possible
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that an AWS admin has legitimately created keys for another user.
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references:
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- 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/
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tags:
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analytic_story:
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- AWS IAM Privilege Escalation
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asset_type: AWS Account
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automated_detection_testing: passed
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cis20:
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- CIS 13
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dataset:
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- https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1078/aws_createaccesskey/aws_cloudtrail_events.json
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kill_chain_phases:
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- Actions on Objectives
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mitre_attack_id:
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- T1136.003
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nist:
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- PR.DS
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- PR.AC
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- DE.CM
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product:
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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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required_fields:
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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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risk_object: src
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risk_object_type: system
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risk_score: 20
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security_domain: network
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