Modify Lambda Function Code¶
| Platform | Author | Last Update |
|---|---|---|
| aws | Nick Jones | 2023-07-01 |
An attacker may attempt to modify the code that a lambda function executes in order to gain a foothold in the environment
MITRE IDs¶
Required Permissions¶
- lambda:UpdateFunctionCode
Required Parameters¶
| Name | Type | Description | Example Value |
|---|---|---|---|
| functionname | str | Name of the function to be targeted | example-function |
| zipfile | str | Filename of the zip file of code to be uploaded | file.zip |
Attacker Action¶
aws lambda update-function-code --function-name example-function --zip-file file.zip --publish
Detection Case¶
ELK query¶
When logs are ingested into ELK, the following Lucene query can be used to identify relevant events.
eventName:None AND eventSource:None
Sigma Definition¶
---
title: Modify Lambda Function Code
id: 7890b11c-19b3-4fb9-bbec-cae87db769ca
status: experimental
author: Nick Jones
date: 2023-07-01
description: An attacker may attempt to modify the code that a lambda function executes in order to gain a foothold in the environment
logsource:
service: cloudtrail
detection:
selection_source:
- eventSource: "None"
events:
- eventName: "None"
condition: selection_source AND events
level: low
tags:
- attack.T1059