Massive upload to SaaS service

Cortex XDR Analytics Alert Reference by Alert name

Product
Cortex XDR
Last date published
2024-06-04
Category
Analytics Alert Reference
Order
Alert name

Synopsis

Activation Period

14 Days

Training Period

30 Days

Test Period

3 Hours

Deduplication Period

1 Day

Required Data

  • Requires one of the following data sources:
    • Box Audit Log
      OR
    • DropBox
      OR
    • Google Workspace Audit Logs
      OR
    • Office 365 Audit

Detection Modules

Identity Threat Module

ATT&CK Tactic

ATT&CK Technique

Severity

Informational

Description

A user uploaded a large amount of data to an organizational cloud storage. This behavior may indicate that the data is being exfiltrated or staged.

Attacker's Goals

An attacker may upload files to a SaaS service to stage and exfiltrate data from the organization.

Investigative actions

  • Check for signs of account compromise, such as abnormal login activity or unusual behavior.
  • Review the files that were uploaded to determine if they contain sensitive data.
  • Verify if the user account that uploaded the files is authorized to access them.
  • Analyze the file types that were uploaded.
  • Monitor the account for any further suspicious actions.

Variations

Massive upload to SaaS service by suspicious user

Synopsis

ATT&CK Tactic

ATT&CK Technique

Severity

Low

Description

A suspicious user uploaded a large amount of data to an organizational cloud storage. This behavior may indicate that the data is being exfiltrated or staged.

Attacker's Goals

An attacker may upload files to a SaaS service to stage and exfiltrate data from the organization.

Investigative actions

  • Check for signs of account compromise, such as abnormal login activity or unusual behavior.
  • Review the files that were uploaded to determine if they contain sensitive data.
  • Verify if the user account that uploaded the files is authorized to access them.
  • Analyze the file types that were uploaded.
  • Monitor the account for any further suspicious actions.