LoFP / it is possible that an aws administrator has legitimately created this task for creating backup. please check the `sourcelocationarn` and `destinationlocationarn` of this task

Techniques

• T1119

Sample rules

AWS Exfiltration via DataSync Task

• source: splunk
• technicques:
  • T1119

Description

The following analytic detects the creation of an AWS DataSync task, which could indicate potential data exfiltration. It leverages AWS CloudTrail logs to identify the CreateTask event from the DataSync service. This activity is significant because attackers can misuse DataSync to transfer sensitive data from a private AWS location to a public one, leading to data compromise. If confirmed malicious, this could result in unauthorized access to sensitive information, causing severe data breaches and compliance violations.

Detection logic

`cloudtrail` eventName = CreateTask eventSource="datasync.amazonaws.com" 
| rename  requestParameters.*  as * 
| rename user_name as user 
| stats count min(_time) as firstTime max(_time) as lastTime by signature dest user user_agent src vendor_account vendor_region vendor_product destinationLocationArn sourceLocationArn 
| `security_content_ctime(firstTime)` 
| `security_content_ctime(lastTime)` 
| `aws_exfiltration_via_datasync_task_filter`