[New Rule] AWS IAM User or Role Created Cloudformation Stack for First Time (#3923)

* [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>
2024-07-31 16:55:49 -04:00
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+[metadata]
+creation_date = "2020/07/25"
+integration = ["aws"]
+maturity = "production"
+min_stack_comments = "Multiple field support in the New Terms rule type was added in Elastic 8.6"
+min_stack_version = "8.6.0"
+updated_date = "2024/07/31"
+
+[rule]
+author = ["Elastic"]
+description = """
+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.
+"""
+false_positives = [
+    """
+    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.
+    """,
+]
+from = "now-6m"
+index = ["filebeat-*", "logs-aws.cloudtrail-*"]
+language = "kuery"
+license = "Elastic License v2"
+name = "First Time AWS Cloudformation Stack Creation by User"
+references = [
+    "https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-cli-creating-stack.html/",
+    "https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/stacksets-concepts.html/",
+    "https://docs.aws.amazon.com/AWSCloudFormation/latest/APIReference/API_CreateStack.html/",
+    "https://docs.aws.amazon.com/AWSCloudFormation/latest/APIReference/API_CreateStackSet.html/",
+]
+risk_score = 47
+rule_id = "0415258b-a7b2-48a6-891a-3367cd9d4d31"
+severity = "medium"
+tags = [
+    "Domain: Cloud",
+    "Data Source: AWS",
+    "Data Source: Amazon Web Services",
+    "Data Source: Cloudformation",
+    "Use Case: Asset Visibility",
+    "Tactic: Execution",
+]
+timestamp_override = "event.ingested"
+type = "new_terms"
+
+query = '''
+event.dataset:aws.cloudtrail and event.provider:cloudformation.amazonaws.com and
+    event.action: (CreateStack or CreateStackSet) and event.outcome:success
+'''
+
+[[rule.threat]]
+framework = "MITRE ATT&CK"
+
+[rule.threat.tactic]
+id = "TA0002"
+name = "Execution"
+reference = "https://attack.mitre.org/tactics/TA0002/"
+
+[rule.new_terms]
+field = "new_terms_fields"
+value = ["cloud.account.id","user.name"]
+[[rule.new_terms.history_window_start]]
+field = "history_window_start"
+value = "now-10d"
+