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First Time AWS CloudFormation Stack Creation

This rule detects the first time a principal calls AWS CloudFormation CreateStack, CreateStackSet or CreateStackInstances API. CloudFormation is used to create a collection of cloud resources called a stack, via a…

Description

This rule detects the first time a principal calls AWS CloudFormation CreateStack, CreateStackSet or CreateStackInstances API. CloudFormation is used to create a 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 for a role or IAM user within a particular account.

Detection logic

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Detection requirements

Platform
IaaSOffice SuiteSaaS

The rule states no platform. This is derived from the 2 ATT&CK techniques it maps to.

Log source category
event_index

Known benign triggers

  • Verify whether the user identity should be using the triggered API. 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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