AWS EC2 Instance Connecting to TOR as a Relay

Classification:

attack

Tactic:

TA0040-impact

Technique:

T1496-resource-hijacking

Set up the guardduty integration.

Overview

Goal

Detect when an EC2 instance is being used as a TOR relay.

Strategy

This rule lets you monitor this GuardDuty integration finding:

• UnauthorizedAccess:EC2/TorRelay

Triage & Response

1. Determine if the EC2 instance should be uses as a TOR relay.
2. If the instance is compromised:
   • Review the AWS documentation on remediating a compromised EC2 instance.