Use Get-NetTCPConnection

Status: test
Severity: low
Log source: category ps_classic_start, product windows
Author: frack113
Source: github.com/SigmaHQ/sigma

Adversaries may attempt to get a listing of network connections to or from the compromised system they are currently accessing or from remote systems by querying for information over the network.

MITRE ATT&CK coverage

Tactic	Techniques
Discovery	`T1049` System Network Connections Discovery

Telemetry coverage

Provider	Record / event type
PowerShell	Event ID 400

Rule body

title: Use Get-NetTCPConnection
id: b366adb4-d63d-422d-8a2c-186463b5ded0
status: test
description: Adversaries may attempt to get a listing of network connections to or from the compromised system they are currently accessing or from remote systems by querying for information over the network.
references:
    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1049/T1049.md#atomic-test-2---system-network-connections-discovery-with-powershell
author: frack113
date: 2021-12-10
modified: 2023-10-27
tags:
    - attack.discovery
    - attack.t1049
logsource:
    product: windows
    category: ps_classic_start
detection:
    selection:
        Data|contains: 'Get-NetTCPConnection'
    condition: selection
falsepositives:
    - Unknown
level: low

Stages and Predicates

Stage 0: `condition`

selection

Stage 1: `selection`

selection:
    Data|contains: 'Get-NetTCPConnection'

Indicators

These rows show field, operator, and value matches.

Field	Kind	Values	Search
`Data`	match	`Get-NetTCPConnection`	`field:"Data" kind:match value:"Get-NetTCPConnection"`