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P4T12ICK
72 lines
2.1 KiB
YAML
72 lines
2.1 KiB
YAML
name: AWS Excessive Security Scanning
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id: 1fdd164a-def8-4762-83a9-9ffe24e74d5a
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version: 1
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date: '2021-04-13'
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author: Patrick Bareiss, Splunk
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type: TTP
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datamodel: []
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description: This search looks for AWS CloudTrail events and analyse the amount of
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eventNames which starts with Describe by a single user. This indicates that this
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user scans the configuration of your AWS cloud environment.
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search: '`cloudtrail` eventName=Describe* OR eventName=List* OR eventName=Get* |
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stats dc(eventName) as dc_events min(_time) as firstTime max(_time) as lastTime
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values(eventName) as eventName values(src) as src values(userAgent) as userAgent
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by user userIdentity.arn | where dc_events > 50 | `security_content_ctime(firstTime)`
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| `security_content_ctime(lastTime)`|`aws_excessive_security_scanning_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 AWS CloudTrail logs.
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known_false_positives: While this search has no known false positives.
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references:
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- https://github.com/aquasecurity/cloudsploit
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tags:
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analytic_story:
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- AWS User Monitoring
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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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confidence: 60
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context:
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- Source:Cloud Data
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- Scope:Inbound
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- Stage:Recon
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dataset:
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- https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1526/aws_security_scanner/aws_security_scanner.json
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impact: 30
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kill_chain_phases:
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- Actions on Objectives
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message: user $user$ has excessive number of api calls $dc_events$ from these IP
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addresses $src$, violating the threshold of 50, using the following commands
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$command$.
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mitre_attack_id:
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- T1526
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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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observable:
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- name: src
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type: IP Address
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role:
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- Attacker
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- name: user
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type: User
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role:
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- Attacker
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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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- src
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- userAgent
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- user
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- userIdentity.arn
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risk_object: src
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risk_object_type: system
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risk_score: 18
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security_domain: network
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