Elastic Security Detection Rules

AWS Lambda Layer Added to Existing Function

Last updated 7 months ago on 2025-01-15
Created a year ago on 2024-04-30

About

Identifies when an Lambda Layer is added to an existing Lambda function. AWS layers are a way to share code and data across multiple functions. By adding a layer to an existing function, an attacker can persist or execute code in the context of the function.
Tags
Domain: CloudData Source: AWSData Source: Amazon Web ServicesData Source: AWS LambdaUse Case: Threat DetectionTactic: ExecutionLanguage: kuery
Severity
low
Risk Score
21
MITRE ATT&CK™

Execution (TA0002)(opens in a new tab or window)

↳ Serverless Execution (T1648)(opens in a new tab or window)

False Positive Examples
Lambda function owners may add layers to their functions for legitimate purposes.
License
Elastic License v2(opens in a new tab or window)

Definition

Rule Type
Query (Kibana Query Language)
Integration Pack
Prebuilt Security Detection Rules
Index Patterns
filebeat-*logs-aws.cloudtrail-*
Related Integrations

aws(opens in a new tab or window)

Query
event.dataset: aws.cloudtrail
    and event.provider: lambda.amazonaws.com
    and event.outcome: success
    and event.action: (PublishLayerVersion* or UpdateFunctionConfiguration)

Install detection rules in Elastic Security

Detect AWS Lambda Layer Added to Existing Function in the Elastic Security detection engine by installing this rule into your Elastic Stack.

To setup this rule, check out the installation guide for Prebuilt Security Detection Rules(opens in a new tab or window).