Visual Studio Code Tunnel Remote File Creation

Status: test
Severity: medium
Log source: category file_event, product windows
Author: Nasreddine Bencherchali (Nextron Systems)
Source: github.com/SigmaHQ/sigma

Detects the creation of file by the "node.exe" process in the ".vscode-server" directory. Could be a sign of remote file creation via VsCode tunnel feature

MITRE ATT&CK coverage

Tactic	Techniques
Command & Control	No specific technique

Telemetry coverage

Provider	Record / event type
Sysmon	Event ID 11: FileCreate

Rule body

title: Visual Studio Code Tunnel Remote File Creation
id: 56e05d41-ce99-4ecd-912d-93f019ee0b71
status: test
description: |
    Detects the creation of file by the "node.exe" process in the ".vscode-server" directory. Could be a sign of remote file creation via VsCode tunnel feature
references:
    - Internal Research
author: Nasreddine Bencherchali (Nextron Systems)
date: 2023-10-25
tags:
    - attack.command-and-control
logsource:
    category: file_event
    product: windows
detection:
    selection:
        Image|contains: '\servers\Stable-'
        Image|endswith: '\server\node.exe'
        TargetFilename|contains: '\.vscode-server\data\User\History\'
    condition: selection
falsepositives:
    - Unknown
level: medium

Stages and Predicates

Stage 0: `condition`

selection

Stage 1: `selection`

selection:
    Image|contains: '\servers\Stable-'
    Image|endswith: '\server\node.exe'
    TargetFilename|contains: '\.vscode-server\data\User\History\'

Indicators

These rows show field, operator, and value matches.

Field	Kind	Values	Search
`Image`	ends_with	`\server\node.exe`	`field:"Image" kind:ends_with value:"\server\node.exe"`
`Image`	match	`\servers\Stable-`	`field:"Image" kind:match value:"\servers\Stable-"`
`TargetFilename`	match	`\.vscode-server\data\User\History\`	`field:"TargetFilename" kind:match value:"\.vscode-server\data\User\History\"`