AWS EC2 Snapshot Activityedit
An attempt was made to modify AWS EC2 snapshot attributes. Snapshots are sometimes shared by threat actors in order to exfiltrate bulk data from an EC2 fleet. If the permissions were modified, verify the snapshot was not shared with an unauthorized or unexpected AWS account.
Rule type: query
Rule indices:
- filebeat-*
Severity: medium
Risk score: 47
Runs every: 10 minutes
Searches indices from: now-60m (Date Math format, see also Additional look-back time)
Maximum alerts per execution: 100
References:
Tags:
- AWS
- Elastic
- SecOps
- Asset Visibility
- Continuous Monitoring
Version: 1
Added (Elastic Stack release): 7.9.0
Rule authors: Elastic
Rule license: Elastic License
Potential false positivesedit
IAM users may occasionally share EC2 snapshots with another AWS account belonging to the same organization. If a known behavior is causing false positives, it can be excluded from the rule.
Investigation guideedit
The AWS Filebeat module must be enabled to use this rule.
Rule queryedit
event.module:aws and event.dataset:aws.cloudtrail and event.provider:ec2.amazonaws.com and event.action:ModifySnapshotAttribute
Threat mappingedit
Framework: MITRE ATT&CKTM
-
Tactic:
- Name: Exfiltration
- ID: TA0010
- Reference URL: https://attack.mitre.org/tactics/TA0010/
-
Technique:
- Name: Transfer Data to Cloud Account
- ID: T1537
- Reference URL: https://attack.mitre.org/techniques/T1537/