A user established an SMB connection to multiple hosts

Cortex XDR Analytics Alert Reference by data source

Product
Cortex XDR
Last date published
2024-12-03
Category
Analytics Alert Reference
Order
data source

Synopsis

Activation Period

14 Days

Training Period

30 Days

Test Period

10 Minutes

Deduplication Period

1 Day

Required Data

  • Requires:
    • XDR Agent with eXtended Threat Hunting (XTH)

Detection Modules

Identity Analytics

Detector Tags

ATT&CK Tactic

Lateral Movement (TA0008)

ATT&CK Technique

Remote Services (T1021)

Severity

Informational

Description

A user established an SMB connection to multiple hosts. This might indicate an enumeration attempt by a compromised account.

Attacker's Goals

Adversaries can effectively map out and strategize their lateral movement within a network by leveraging diverse protocols for reconnaissance.

Investigative actions

  • Verify if the host is a newly deployed server that consists of SMB services to multiple hosts.
  • Look for the process that initiated this activity on the remote host.
  • Check if the user is authorized to perform such activity.

Variations

A user established an SMB connection to multiple hosts for the first time

Synopsis

ATT&CK Tactic

Lateral Movement (TA0008)

ATT&CK Technique

Remote Services (T1021)

Severity

Medium

Description

A user established an SMB connection to multiple hosts. This might indicate an enumeration attempt by a compromised account.

Attacker's Goals

Adversaries can effectively map out and strategize their lateral movement within a network by leveraging diverse protocols for reconnaissance.

Investigative actions

  • Verify if the host is a newly deployed server that consists of SMB services to multiple hosts.
  • Look for the process that initiated this activity on the remote host.
  • Check if the user is authorized to perform such activity.


A user performed an abnormal SMB activity to multiple hosts

Synopsis

ATT&CK Tactic

Lateral Movement (TA0008)

ATT&CK Technique

Remote Services (T1021)

Severity

Low

Description

A user established an SMB connection to multiple hosts. This might indicate an enumeration attempt by a compromised account.

Attacker's Goals

Adversaries can effectively map out and strategize their lateral movement within a network by leveraging diverse protocols for reconnaissance.

Investigative actions

  • Verify if the host is a newly deployed server that consists of SMB services to multiple hosts.
  • Look for the process that initiated this activity on the remote host.
  • Check if the user is authorized to perform such activity.