Massive upload to a rare storage or mail domain

Synopsis

Field	Value
Activation Period	14 Days
Training Period	30 Days
Test Period	1 Hour
Deduplication Period	1 Day
Required Data	Requires all of the following: Palo Alto Networks Firewall EAL Logs OR Palo Alto Networks Firewall threat Logs XDR Agent
Detection Modules	Identity Threat Module, SaaS Threat Detection
Detector Tags	Data Detection & Response
ATT&CK Tactic	Exfiltration (TA0010)
ATT&CK Technique	Exfiltration Over Web Service (T1567), Exfiltration Over Web Service: Exfiltration to Cloud Storage (T1567.002)
Severity	Informational

Description

A large amount of data was transferred to an external site that is used for mail or storage. This behavior may indicate data exfiltration.

Attacker's Goals

A user uploaded an abnormal amount of data to a file sharing service. This activity might indicate an attempt to exfiltrate files and data from the organization.

Investigative actions

• Check for any other suspicious activity related to the host and the user involved in the alert.
• Identify the user uploading the data to determine if the transfer is sanctioned.

Variations

A user uploaded over 500 MB to a rare storage or mail domain

Synopsis

Field	Value
ATT&CK Tactic	Exfiltration (TA0010)
ATT&CK Technique	Exfiltration Over Web Service (T1567), Exfiltration Over Web Service: Exfiltration to Cloud Storage (T1567.002)
Severity	Low

Description

A user uploaded over 500 MB to a file sharing service that is rarely accessed by them or anyone else in the organization.

Attacker's Goals

A user uploaded an abnormal amount of data to a file sharing service. This activity might indicate an attempt to exfiltrate files and data from the organization.

Investigative actions

• Check for any other suspicious activity related to the host and the user involved in the alert.
• Identify the user uploading the data to determine if the transfer is sanctioned.