title: PowerShell Deleted Mounted Share
author: oscd.community, @redcanary, Zach Stanford @svch0st
date: 2020/10/08
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
detection:
    SELECTION_1:
        ScriptBlockText: '*Remove-SmbShare*'
    SELECTION_2:
        ScriptBlockText: '*Remove-FileShare*'
    condition: (SELECTION_1 or SELECTION_2)
falsepositives:
- Administrators or Power users may remove their shares via cmd line
id: 66a4d409-451b-4151-94f4-a55d559c49b0
level: medium
logsource:
    category: ps_script
    definition: Script block logging must be enabled
    product: windows
modified: 2021/10/16
references:
- https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1070.005/T1070.005.md
status: experimental
tags:
- attack.defense_evasion
- attack.t1070.005
yml_filename: powershell_suspicious_mounted_share_deletion.yml
yml_path: /Users/user/Documents/YamatoSecurity/sigma/rules/windows/powershell/powershell_script