Detectionmediumtest
Suspicious PowerShell WindowStyle Option
Adversaries may use hidden windows to conceal malicious activity from the plain sight of users. In some cases, windows that would typically be displayed when an application carries out an operation can be hidden
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Launch
François Hubaut, Tim Shelton (fp AWS)Created Wed Oct 20Updated Tue Jan 03313fbb0a-a341-4682-848d-6d6f8c4fab7cwindows
Log Source
WindowsPowerShell Script
ProductWindows← raw: windows
CategoryPowerShell Script← raw: ps_script
Definition
Requirements: Script Block Logging must be enabled
Detection Logic
Detection Logic2 selectors
detection:
selection:
ScriptBlockText|contains|all:
- 'powershell'
- 'WindowStyle'
- 'Hidden'
filter:
ScriptBlockText|contains|all:
- ':\Program Files\Amazon\WorkSpacesConfig\Scripts\'
- '$PSScriptRoot\Module\WorkspaceScriptModule\WorkspaceScriptModule'
condition: selection and not filterFalse Positives
Unknown
False positive likelihood has not been assessed. Additional context may be needed during triage.
References
MITRE ATT&CK
Tactics
Sub-techniques
Rule Metadata
Rule ID
313fbb0a-a341-4682-848d-6d6f8c4fab7c
Status
test
Level
medium
Type
Detection
Created
Wed Oct 20
Modified
Tue Jan 03
Path
rules/windows/powershell/powershell_script/posh_ps_susp_windowstyle.yml
Raw Tags
attack.defense-evasionattack.t1564.003