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Detectionhightest

Invoke-Obfuscation Via Stdin - PowerShell Module

Detects Obfuscated Powershell via Stdin in Scripts

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Nikita Nazarov, oscd.communityCreated Mon Oct 12Updated Fri Apr 05c72aca44-8d52-45ad-8f81-f96c4d3c755ewindows
Log Source
WindowsPowerShell Module
ProductWindows← raw: windows
CategoryPowerShell Module← raw: ps_module

Definition

0ad03ef1-f21b-4a79-8ce8-e6900c54b65b

Detection Logic
Detection Logic1 selector
detection:
    selection_4103:
        Payload|re: '(?i)(set).*&&\s?set.*(environment|invoke|\$?\{?input).*&&.*"'
    condition: selection_4103
False Positives
Unknown

False positive likelihood has not been assessed. Additional context may be needed during triage.

References
1
Resolving title…
github.com
MITRE ATT&CK
Related Rules
DerivedDetectionhigh

Invoke-Obfuscation Via Stdin - Powershell

Detects Obfuscated Powershell via Stdin in Scripts

This rule was derived from the related rule - both detect similar activity with different scope.

Rule Metadata
Rule ID
c72aca44-8d52-45ad-8f81-f96c4d3c755e
Status
test
Level
high
Type
Detection
Created
Mon Oct 12
Modified
Fri Apr 05
Author
Nikita Nazarov, oscd.community
Path
rules/windows/powershell/powershell_module/posh_pm_invoke_obfuscation_via_stdin.yml
Raw Tags
attack.defense-evasionattack.t1027attack.executionattack.t1059.001
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