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Import PowerShell Modules From Suspicious Directories

Detects powershell scripts that import modules from suspicious directories

MITRE ATT&CK

execution

Detection Query

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 $Env:Appdata\
    - Import-Module C:\Users\Public\
    - ipmo "$Env:Temp\
    - ipmo '$Env:Temp\
    - ipmo $Env:Temp\
    - ipmo "$Env:Appdata\
    - ipmo '$Env:Appdata\
    - ipmo $Env:Appdata\
    - ipmo C:\Users\Public\
condition: selection

Author

Nasreddine Bencherchali (Nextron Systems)

Created

2022-07-07

Data Sources

windowsps_script

Platforms

windows

References

https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1003.002/T1003.002.md

Tags

attack.executionattack.t1059.001

Raw Content

title: Import PowerShell Modules From Suspicious Directories
id: 21f9162c-5f5d-4b01-89a8-b705bd7d10ab
related:
    - id: c31364f7-8be6-4b77-8483-dd2b5a7b69a3
      type: similar
status: test
description: Detects powershell scripts that import modules from suspicious directories
references:
    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1003.002/T1003.002.md
author: Nasreddine Bencherchali (Nextron Systems)
date: 2022-07-07
modified: 2023-01-10
tags:
    - attack.execution
    - attack.t1059.001
logsource:
    product: windows
    category: ps_script
    definition: 'Requirements: Script Block Logging must be enabled'
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
falsepositives:
    - Unknown
level: medium