Elastic Security Detection Rules

AWS EC2 Security Group Configuration Change

Last updated 14 days ago on 2024-11-07
Created 4 years ago on 2021-05-05

About

Identifies a change to an AWS Security Group Configuration. A security group is like a virtual firewall, and modifying configurations may allow unauthorized access. Threat actors may abuse this to establish persistence, exfiltrate data, or pivot in an AWS environment.
Tags
Domain: CloudData Source: AWSData Source: Amazon Web ServicesData Source: AWS EC2Use Case: Network Security MonitoringTactic: PersistenceTactic: Defense Evasion
Severity
low
Risk Score
21
MITRE ATT&CK™

Persistence (TA0003)(opens in a new tab or window)

Defense Evasion (TA0005)(opens in a new tab or window)

↳ Impair Defenses (T1562)(opens in a new tab or window)

False Positive Examples
A security group may be created by a system or network administrator. Verify whether the user identity, user agent, and/or hostname should be making changes in your environment. Security group creations by unfamiliar users or hosts should be investigated. If known behavior is causing false positives, it can be exempted from the rule.
License
Elastic License v2(opens in a new tab or window)

Definition

Rule Type
Query (Kibana Query Language)
Integration Pack
Prebuilt Security Detection Rules
Index Patterns
filebeat-*logs-aws.cloudtrail-*
Related Integrations

aws(opens in a new tab or window)

Query
event.dataset: "aws.cloudtrail"
    and event.provider: "ec2.amazonaws.com"
    and event.action:(
            "AuthorizeSecurityGroupEgress" or
            "CreateSecurityGroup" or
            "ModifyInstanceAttribute" or
            "ModifySecurityGroupRules" or
            "RevokeSecurityGroupEgress" or
            "RevokeSecurityGroupIngress")
    and event.outcome: "success"

Install detection rules in Elastic Security

Detect AWS EC2 Security Group Configuration Change in the Elastic Security detection engine by installing this rule into your Elastic Stack.

To setup this rule, check out the installation guide for Prebuilt Security Detection Rules(opens in a new tab or window).