sigmamediumHunting

Powershell Inline Execution From A File

Detects inline execution of PowerShell code from a file

MITRE ATT&CK

execution

Detection Query

selection_exec:
  CommandLine|contains:
    - "iex "
    - "Invoke-Expression "
    - "Invoke-Command "
    - "icm "
selection_read:
  CommandLine|contains:
    - "cat "
    - "get-content "
    - "type "
selection_raw:
  CommandLine|contains: " -raw"
condition: all of selection_*

Author

frack113

Created

2022-12-25

Data Sources

windowsProcess Creation Events

Platforms

windows

References

https://speakerdeck.com/heirhabarov/hunting-for-powershell-abuse?slide=50

Tags

attack.executionattack.t1059.001

Raw Content

title: Powershell Inline Execution From A File
id: ee218c12-627a-4d27-9e30-d6fb2fe22ed2
status: test
description: Detects inline execution of PowerShell code from a file
references:
    - https://speakerdeck.com/heirhabarov/hunting-for-powershell-abuse?slide=50
author: frack113
date: 2022-12-25
tags:
    - attack.execution
    - attack.t1059.001
logsource:
    product: windows
    category: process_creation
detection:
    selection_exec:
        CommandLine|contains:
            - 'iex '
            - 'Invoke-Expression '
            - 'Invoke-Command '
            - 'icm '
    selection_read:
        CommandLine|contains:
            - 'cat '
            - 'get-content '
            - 'type '
    selection_raw:
        CommandLine|contains: ' -raw'
    condition: all of selection_*
falsepositives:
    - Unknown
level: medium