Windows net.exe Unmount Share (/delete) Execution
Alerts on net.exe/net1.exe commands that include "share" and "/delete", indicating share unmount/removal on Windows.
- Product
- windows
- Category
- process_creation
- Author
- oscd.community, @redcanary, Zach Stanford @svch0st (SigmaHQ), DRL 1.1
- Published
- 2020-10-08
- Updated
- 2026-07-30
ATT&CK techniques
Defense EvasionRecon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact
What it detects
This rule identifies process executions of net.exe (or net1.exe) with command-line parameters that include both "share" and "/delete", indicating an unmount or removal of a mounted share connection. Attackers may use share removal to reduce available artifacts and clean up after accessing network resources. It relies on Windows process creation telemetry, specifically the executable name/path and the command-line content.
Reporting behind it
Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.
title: Windows net.exe Unmount Share (/delete) Execution
id: ee1127bd-8b9c-4c47-a540-8eddb4968bd1
status: test
description: This rule identifies process executions of net.exe (or net1.exe) with command-line parameters that include both "share" and "/delete", indicating an unmount or removal of a mounted share connection. Attackers may use share removal to reduce available artifacts and clean up after accessing network resources. It relies on Windows process creation telemetry, specifically the executable name/path and the command-line content.
references:
- https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1070.005/T1070.005.md
- https://github.com/SigmaHQ/sigma/blob/master/rules/windows/process_creation/proc_creation_win_net_share_unmount.yml
author: oscd.community, @redcanary, Zach Stanford @svch0st, Huntrule Team
date: 2020-10-08
modified: 2023-02-21
tags:
- attack.stealth
- attack.t1070.005
logsource:
category: process_creation
product: windows
detection:
selection_img:
- Image|endswith:
- \net.exe
- \net1.exe
- OriginalFileName:
- net.exe
- net1.exe
selection_cli:
CommandLine|contains|all:
- share
- /delete
condition: all of selection*
falsepositives:
- Administrators or Power users may remove their shares via cmd line
level: low
license: DRL-1.1
related:
- id: cb7c4a03-2871-43c0-9bbb-18bbdb079896
type: derived