LoFP / applications integrated with aws might assume roles to access aws resources.

Techniques

• T1548
• T1550

Sample rules

AWS STS Role Assumption by User

• source: elastic
• technicques:
  • T1548
  • T1550

Description

Identifies when a user or role has assumed a role in AWS Security Token Service (STS). Users can assume a role to obtain temporary credentials and access AWS resources. Adversaries can use this technique for credential access and privilege escalation. This is a New Terms rule that identifies when a service assumes a role in AWS Security Token Service (STS) to obtain temporary credentials and access AWS resources. While often legitimate, adversaries may use this technique for unauthorized access, privilege escalation, or lateral movement within an AWS environment.

Detection logic

event.dataset: "aws.cloudtrail"
    and event.provider: "sts.amazonaws.com"
    and event.action: "AssumeRole"
    and event.outcome: "success"
    and aws.cloudtrail.user_identity.type: ("AssumedRole" or "IAMUser")