Add an existing role to a new EC2 instance¶
| Platform | Author | Last Update |
|---|---|---|
| aws | Nick Jones | 2023-07-01 |
An adversary may attach an existing role to a new EC2 instance to which they have access
MITRE IDs¶
Required Permissions¶
- iam:PassRole
- ec2:RunInstances
Required Parameters¶
| Name | Type | Description | Example Value |
|---|---|---|---|
| image_id | str | AMI to create instance from | ami-a4dc46db |
| instance_type | str | Type of instance to create | t2.micro |
| iam_instance_profile_name | str | EC2 instance profile to assign | ec2-instance-profile |
| key_name | str | Name of SSH key to assign to instance | my-ssh-key |
| security_group_id | str | ID of a security group to apply to the instance | sg-123456 |
Attacker Action¶
aws ec2 run-instances –image-id image_id –instance-type instance_type –iam-instance-profile Name=iam_instance_profile_name –key-name key_name –security-group-ids security_group_ids
Detection Case¶
ELK query¶
When logs are ingested into ELK, the following Lucene query can be used to identify relevant events.
eventName:RunInstances AND eventSource:ec2.amazonaws.com
Sigma Definition¶
---
title: Add an existing role to a new EC2 instance
id: 899eb2b1-6e96-4203-bd38-9cddf970a50a
status: experimental
author: Nick Jones
date: 2023-07-01
description: An adversary may attach an existing role to a new EC2 instance to which they have access
logsource:
service: cloudtrail
detection:
selection_source:
- eventSource: "ec2.amazonaws.com"
events:
- eventName: "RunInstances"
condition: selection_source AND events
level: low
tags:
- attack.T1098