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Detection rules › Sigma

Use Get-NetTCPConnection - PowerShell Module

Status
test
Severity
low
Log source
product windows, category ps_module
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

TacticTechniques
DiscoveryT1049 System Network Connections Discovery

Event coverage

ProviderEventTitle
PowerShellEvent ID 4103Payload Context: ContextInfo User Data: UserData.

Rule body yaml

title: Use Get-NetTCPConnection - PowerShell Module
id: aff815cc-e400-4bf0-a47a-5d8a2407d4e1
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: 2022-12-02
tags:
    - attack.discovery
    - attack.t1049
logsource:
    product: windows
    category: ps_module
    definition: 0ad03ef1-f21b-4a79-8ce8-e6900c54b65b
detection:
    selection:
        ContextInfo|contains: 'Get-NetTCPConnection'
    condition: selection
falsepositives:
    - Unknown
level: low

Stages and Predicates

Stage 0: condition

selection

Stage 1: selection

selection:
    ContextInfo|contains: 'Get-NetTCPConnection'

Indicators

Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.

FieldKindValues
ContextInfomatch
  • Get-NetTCPConnection