Brent Murphy
57 lines
1.9 KiB
TOML
57 lines
1.9 KiB
TOML
[metadata]
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creation_date = "2020/06/04"
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ecs_version = ["1.6.0"]
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maturity = "production"
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updated_date = "2020/09/03"
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[rule]
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author = ["Elastic"]
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description = """
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Identifies the creation of an AWS Elastic Compute Cloud (EC2) network access control list (ACL) or an entry in a network
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ACL with a specified rule number.
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"""
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false_positives = [
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"""
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Network ACL's may be created by a network administrator. Verify whether the user identity, user agent, and/or
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hostname should be making changes in your environment. Network ACL creations from unfamiliar users or hosts should
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be investigated. If known behavior is causing false positives, it can be exempted from the rule.
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""",
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]
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from = "now-60m"
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index = ["filebeat-*", "logs-aws*"]
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interval = "10m"
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language = "kuery"
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license = "Elastic License"
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name = "AWS EC2 Network Access Control List Creation"
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note = "The AWS Filebeat module must be enabled to use this rule."
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references = [
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"https://awscli.amazonaws.com/v2/documentation/api/latest/reference/ec2/create-network-acl.html",
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"https://docs.aws.amazon.com/AWSEC2/latest/APIReference/API_CreateNetworkAcl.html",
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"https://awscli.amazonaws.com/v2/documentation/api/latest/reference/ec2/create-network-acl-entry.html",
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"https://docs.aws.amazon.com/AWSEC2/latest/APIReference/API_CreateNetworkAclEntry.html",
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]
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risk_score = 21
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rule_id = "39144f38-5284-4f8e-a2ae-e3fd628d90b0"
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severity = "low"
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tags = ["AWS", "Elastic", "SecOps", "Network", "Continuous Monitoring"]
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type = "query"
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query = '''
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event.action:(CreateNetworkAcl or CreateNetworkAclEntry) and event.dataset:aws.cloudtrail and event.provider:ec2.amazonaws.com and event.outcome:success
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'''
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[[rule.threat]]
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framework = "MITRE ATT&CK"
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[[rule.threat.technique]]
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id = "T1108"
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name = "Redundant Access"
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reference = "https://attack.mitre.org/techniques/T1108/"
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[rule.threat.tactic]
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id = "TA0003"
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name = "Persistence"
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reference = "https://attack.mitre.org/tactics/TA0003/"
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