VsCode Powershell Profile Modification — Sigma Rule

Rule metadata and linked tags

Author: Nasreddine Bencherchali (Nextron Systems). Source status: test; severity: medium. Source dates: 2022-08-24 / 2023-01-06.

{
  "product": "windows",
  "category": "file_event"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 76c2a4435f0a782ae3993ca3af10eaa45c7bc8fa7f6c98c935c5315d0e671761

Detection logic

Original source YAML. Source-tag agreement is not proof of complete semantic coverage. This rule has not been compiled for a SIEM backend or validated against live telemetry here.

title: VsCode Powershell Profile Modification
id: 3a9fa2ec-30bc-4ebd-b49e-7c9cff225502
related:
    - id: b5b78988-486d-4a80-b991-930eff3ff8bf
      type: similar
status: test
description: Detects the creation or modification of a vscode related powershell profile which could indicate suspicious activity as the profile can be used as a mean of persistence
references:
    - https://learn.microsoft.com/en-us/powershell/module/microsoft.powershell.core/about/about_profiles?view=powershell-7.2
author: Nasreddine Bencherchali (Nextron Systems)
date: 2022-08-24
modified: 2023-01-06
tags:
    - attack.persistence
    - attack.privilege-escalation
    - attack.t1546.013
logsource:
    product: windows
    category: file_event
detection:
    selection:
        TargetFilename|endswith: '\Microsoft.VSCode_profile.ps1'
    condition: selection
falsepositives:
    - Legitimate use of the profile by developers or administrators
level: medium

Original YAML and metadata in JSON

False positives

• Legitimate use of the profile by developers or administrators

Source references

• https://learn.microsoft.com/en-us/powershell/module/microsoft.powershell.core/about/about_profiles?view=powershell-7.2