Detectionmediumtest

Import PowerShell Modules From Suspicious Directories

Detects powershell scripts that import modules from suspicious directories

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Nasreddine Bencherchali (Nextron Systems)Created Thu Jul 07Updated Tue Jan 1021f9162c-5f5d-4b01-89a8-b705bd7d10abwindows

Log Source

WindowsPowerShell Script

ProductWindows← raw: windows

CategoryPowerShell Script← raw: ps_script

Definition

Requirements: Script Block Logging must be enabled

Detection Logic

detection:
    selection:
        ScriptBlockText|contains:
            - 'Import-Module "$Env:Temp\'
            - Import-Module '$Env:Temp\
            - 'Import-Module $Env:Temp\'
            - 'Import-Module "$Env:Appdata\'
            - Import-Module '$Env:Appdata\
            - 'Import-Module $Env:Appdata\'
            - 'Import-Module C:\Users\Public\'
            # Import-Module alias is "ipmo"
            - 'ipmo "$Env:Temp\'
            - ipmo '$Env:Temp\
            - 'ipmo $Env:Temp\'
            - 'ipmo "$Env:Appdata\'
            - ipmo '$Env:Appdata\
            - 'ipmo $Env:Appdata\'
            - 'ipmo C:\Users\Public\'
    condition: selection