Large Upload (SMTP)

Cortex XSIAM Analytics Alert Reference by Alert name

Product

Cortex XSIAM

Last date published

2025-01-19

Activation Period	14 Days
Training Period	30 Days
Test Period	1 Day
Deduplication Period	1 Day
Required Data	Requires one of the following data sources: Palo Alto Networks Platform Logs OR XDR Agent OR Third-Party Firewalls
Detection Modules
Detector Tags
ATT&CK Tactic	Exfiltration (TA0010)
ATT&CK Technique	Exfiltration Over Alternative Protocol (T1048)
Severity	Low

The endpoint, which is not an internal SMTP server, emailed an excessive amount of data from your network.

Transfer data they have stolen from your network to a location that is convenient and useful to him.

Identify the process/user performing the data transfer to determine if the transfer is sanctioned.
Verify that the source is not a mail server.
Check if the target address represents a mail service that rarely used in the organization. If so, this might indicate on file exfiltration attempt.

Large Upload (SMTP)

ATT&CK Tactic	Exfiltration (TA0010)
ATT&CK Technique	Exfiltration Over Alternative Protocol (T1048)
Severity	Informational

The endpoint, which is not an internal SMTP server, emailed an excessive amount of data from your network.

Transfer data they have stolen from your network to a location that is convenient and useful to him.

Identify the process/user performing the data transfer to determine if the transfer is sanctioned.
Verify that the source is not a mail server.
Check if the target address represents a mail service that rarely used in the organization. If so, this might indicate on file exfiltration attempt.