Isai
f2eb78219c
* [New Rule] AWS IAM User or Role Created Cloudformation Stack for First Time * Update discovery_new_terms_sts_getcalleridentity.toml * Update execution_new_terms_ec2_instance_cloudformation_createstack.toml * Update rules/integrations/aws/execution_new_terms_ec2_instance_cloudformation_createstack.toml Co-authored-by: Terrance DeJesus <99630311+terrancedejesus@users.noreply.github.com> * rule name change, removed ec2 * Update rules/integrations/aws/execution_new_terms_cloudformation_createstack.toml Co-authored-by: Ruben Groenewoud <78494512+Aegrah@users.noreply.github.com> --------- Co-authored-by: Terrance DeJesus <99630311+terrancedejesus@users.noreply.github.com> Co-authored-by: Ruben Groenewoud <78494512+Aegrah@users.noreply.github.com>
64 lines
2.5 KiB
TOML
64 lines
2.5 KiB
TOML
[metadata]
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creation_date = "2020/07/25"
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integration = ["aws"]
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maturity = "production"
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min_stack_comments = "Multiple field support in the New Terms rule type was added in Elastic 8.6"
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min_stack_version = "8.6.0"
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updated_date = "2024/07/31"
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[rule]
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author = ["Elastic"]
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description = """
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This rule detects the first time a principal calls AWS Cloudwatch `CreateStack` or `CreateStackSet` API. Cloudformation is used to create a single collection of cloud resources called a stack, via a defined template file. An attacker with the appropriate privileges could leverage Cloudformation to create specific resources needed to further exploit the environment. This is a new terms rule that looks for the first instance of this behavior in the last 10 days for a role or IAM user within a particular account.
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"""
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false_positives = [
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"""
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Verify whether the user identity should be using the `CreateStack` or `CreateStackSet` APIs. If known behavior is causing false positives, it can be exempted from the rule. The "history_window_start" value can be modified to reflect the expected frequency of known activity within a particular environment.
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""",
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]
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from = "now-6m"
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index = ["filebeat-*", "logs-aws.cloudtrail-*"]
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language = "kuery"
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license = "Elastic License v2"
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name = "First Time AWS Cloudformation Stack Creation by User"
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references = [
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"https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-cli-creating-stack.html/",
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"https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/stacksets-concepts.html/",
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"https://docs.aws.amazon.com/AWSCloudFormation/latest/APIReference/API_CreateStack.html/",
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"https://docs.aws.amazon.com/AWSCloudFormation/latest/APIReference/API_CreateStackSet.html/",
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]
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risk_score = 47
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rule_id = "0415258b-a7b2-48a6-891a-3367cd9d4d31"
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severity = "medium"
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tags = [
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"Domain: Cloud",
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"Data Source: AWS",
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"Data Source: Amazon Web Services",
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"Data Source: Cloudformation",
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"Use Case: Asset Visibility",
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"Tactic: Execution",
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]
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timestamp_override = "event.ingested"
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type = "new_terms"
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query = '''
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event.dataset:aws.cloudtrail and event.provider:cloudformation.amazonaws.com and
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event.action: (CreateStack or CreateStackSet) 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.tactic]
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id = "TA0002"
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name = "Execution"
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reference = "https://attack.mitre.org/tactics/TA0002/"
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[rule.new_terms]
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field = "new_terms_fields"
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value = ["cloud.account.id","user.name"]
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[[rule.new_terms.history_window_start]]
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field = "history_window_start"
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value = "now-10d"
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