Potential Reconnaissance Activity Via GatherNetworkInfo.VBS

Status: test
Severity: medium
Log source: category process_creation, product windows
Author: blueteamer8699
Source: github.com/SigmaHQ/sigma

Detects execution of the built-in script located in "C:\Windows\System32\gatherNetworkInfo.vbs". Which can be used to gather information about the target machine

Known false positives

Administrative activity

MITRE ATT&CK coverage

Tactic	Techniques
Execution	`T1059.005` Command and Scripting Interpreter: Visual Basic
Discovery	`T1615` Group Policy Discovery

Telemetry coverage

Provider	Record / event type
Sysmon	Event ID 1: Process creation

Rule body

title: Potential Reconnaissance Activity Via GatherNetworkInfo.VBS
id: 575dce0c-8139-4e30-9295-1ee75969f7fe
related:
    - id: f92a6f1e-a512-4a15-9735-da09e78d7273 # FileCreate
      type: similar
    - id: 07aa184a-870d-413d-893a-157f317f6f58 # ProcCreation Susp
      type: similar
status: test
description: Detects execution of the built-in script located in "C:\Windows\System32\gatherNetworkInfo.vbs". Which can be used to gather information about the target machine
references:
    - https://posts.slayerlabs.com/living-off-the-land/#gathernetworkinfovbs
    - https://www.mandiant.com/resources/blog/trojanized-windows-installers-ukrainian-government
author: blueteamer8699
date: 2022-01-03
modified: 2023-02-08
tags:
    - attack.discovery
    - attack.execution
    - attack.t1615
    - attack.t1059.005
logsource:
    category: process_creation
    product: windows
detection:
    selection_img:
        - Image|endswith:
              - '\cscript.exe'
              - '\wscript.exe'
        - OriginalFileName:
              - 'cscript.exe'
              - 'wscript.exe'
    selection_cli:
        CommandLine|contains: 'gatherNetworkInfo.vbs'
    condition: all of selection_*
falsepositives:
    - Administrative activity
level: medium

Stages and Predicates

Stage 0: `condition`

all of selection_*

Stage 1: `selection_img`

selection_img:
    - Image|endswith:
          - '\cscript.exe'
          - '\wscript.exe'
    - OriginalFileName:
          - 'cscript.exe'
          - 'wscript.exe'

Stage 2: `selection_cli`

selection_cli:
    CommandLine|contains: 'gatherNetworkInfo.vbs'

Indicators

These rows show field, operator, and value matches.

Field	Kind	Values	Search
`CommandLine`	match	`gatherNetworkInfo.vbs` corpus 2 (sigma 2)	`field:"CommandLine" kind:match value:"gatherNetworkInfo.vbs"`
`Image`	ends_with	`\cscript.exe` corpus 72 (sigma 72) `\wscript.exe` corpus 74 (sigma 74)	`field:"Image" kind:ends_with`
`OriginalFileName`	eq	`cscript.exe` corpus 32 (sigma 17, elastic 15) `wscript.exe` corpus 38 (elastic 21, sigma 17)	`field:"OriginalFileName" kind:eq`