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PowerShell Deleted Mounted Share

Detects when when a mounted share is removed. Adversaries may remove share connections that are no longer useful in order to clean up traces of their operation

MITRE ATT&CK

T1070.005

defense-evasion

Detection Query

selection:
  ScriptBlockText|contains:
    - Remove-SmbShare
    - Remove-FileShare
filter_main_module_load:
  ScriptBlockText|contains|all:
    - FileShare.cdxml
    - Microsoft.PowerShell.Core\Export-ModuleMember
    - ROOT/Microsoft/Windows/Storage/MSFT_FileShare
    - ObjectModelWrapper
    - Cmdletization.MethodParameter
condition: selection and not 1 of filter_main_*

Author

oscd.community, @redcanary, Zach Stanford @svch0st

Created

2020-10-08

Data Sources

windowsps_script

Platforms

windows

References

https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1070.005/T1070.005.md

Tags

attack.defense-evasionattack.t1070.005

Raw Content

title: PowerShell Deleted Mounted Share
id: 66a4d409-451b-4151-94f4-a55d559c49b0
status: test
description: Detects when when a mounted share is removed. Adversaries may remove share connections that are no longer useful in order to clean up traces of their operation
references:
    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1070.005/T1070.005.md
author: 'oscd.community, @redcanary, Zach Stanford @svch0st'
date: 2020-10-08
modified: 2025-10-07
tags:
    - attack.defense-evasion
    - attack.t1070.005
logsource:
    product: windows
    category: ps_script
    definition: 'Requirements: Script Block Logging must be enabled'
detection:
    selection:
        ScriptBlockText|contains:
            - 'Remove-SmbShare'
            - 'Remove-FileShare'
    filter_main_module_load:
        ScriptBlockText|contains|all:
            - 'FileShare.cdxml'
            - 'Microsoft.PowerShell.Core\Export-ModuleMember'
            - 'ROOT/Microsoft/Windows/Storage/MSFT_FileShare'
            - 'ObjectModelWrapper'
            - 'Cmdletization.MethodParameter'
    condition: selection and not 1 of filter_main_*
falsepositives:
    - Administrators or Power users may remove their shares via cmd line
level: medium