EC2 Instance Modified With Previously Unseen User

Description

This search looks for EC2 instances being modified by users who have not previously modified them.

Content Mapping

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Use Case

Advanced Threat Detection

Category

Cloud Security, SaaS

Alert Volume

This search looks for EC2 instances being modified by users who have not previously modified them.

SPL Difficulty

None

Journey

Stage 3

MITRE ATT&CK Tactics

Defense Evasion
Persistence
Privilege Escalation
Initial Access

MITRE ATT&CK Techniques

Valid Accounts

Cloud Accounts

MITRE Threat Groups

APT33

Data Sources

AWS
Audit Trail

   Help

EC2 Instance Modified With Previously Unseen User Help

You must install the AWS App for Splunk (version 5.1.0 or later) and Splunk Add-on for AWS (version 4.4.0 or later), then configure your CloudTrail inputs. This search works best when you run the "Previously Seen EC2 Launches By User" support search once to create a history of previously seen ARNs. To add or remove APIs that modify an EC2 instance, edit the macro ec2_modification_api_calls.

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