Rare SMB session to a remote host

Synopsis

Field	Value
Activation Period	14 Days
Training Period	30 Days
Test Period	N/A (single event)
Deduplication Period	2 Days
Required Data	Requires one of the following data sources: Palo Alto Networks Firewall traffic Logs OR XDR Agent OR Third-Party Firewalls
Detector Tags	NDR Lateral Movement Analytics
ATT&CK Tactic	Lateral Movement (TA0008)
ATT&CK Technique	Remote Services (T1021)
Severity	Low

Description

The endpoint performed a rare SMB activity to a remote host.

Attacker's Goals

Attackers may use the SMB protocol in an attempt to move laterally in the network, and expand their foothold in the organization.

Investigative actions

• Check whether the username used in the SMB connection is legitimate.
• Verify that this isn't IT activity.

Variations

Rare SMB session to a remote host

Synopsis

Field	Value
ATT&CK Tactic	Lateral Movement (TA0008)
ATT&CK Technique	Remote Services (T1021)
Severity	Informational

Description

The endpoint performed a rare SMB activity to a remote host.

Attacker's Goals

Attackers may use the SMB protocol in an attempt to move laterally in the network, and expand their foothold in the organization.

Investigative actions

• Check whether the username used in the SMB connection is legitimate.
• Verify that this isn't IT activity.