Detection rules › Sigma
New Process Created Via Taskmgr.EXE
Detects the creation of a process via the Windows task manager. This might be an attempt to bypass UAC
Known false positives
- Administrative activity
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Stealth |
Telemetry coverage
| Provider | Record / event type |
|---|---|
| Sysmon | Event ID 1: Process creation |
| Security-Auditing | Event ID 4688: A new process has been created. |
Rule body
title: New Process Created Via Taskmgr.EXE
id: 3d7679bd-0c00-440c-97b0-3f204273e6c7
status: test
description: Detects the creation of a process via the Windows task manager. This might be an attempt to bypass UAC
references:
- https://twitter.com/ReneFreingruber/status/1172244989335810049
author: Florian Roth (Nextron Systems)
date: 2018-03-13
modified: 2024-01-18
tags:
- attack.stealth
- attack.t1036
logsource:
category: process_creation
product: windows
detection:
selection:
ParentImage|endswith: '\taskmgr.exe'
filter_main_generic:
Image|endswith:
- ':\Windows\System32\mmc.exe'
- ':\Windows\System32\resmon.exe'
- ':\Windows\System32\Taskmgr.exe'
condition: selection and not 1 of filter_main_*
falsepositives:
- Administrative activity
level: low
Stages and Predicates
Stage 0: condition
selection and not 1 of filter_main_*Stage 1: selection
selection:
ParentImage|endswith: '\taskmgr.exe'
Stage 2: not filter_main_generic
filter_main_generic:
Image|endswith:
- ':\Windows\System32\mmc.exe'
- ':\Windows\System32\resmon.exe'
- ':\Windows\System32\Taskmgr.exe'
Exclusions
The rule actively suppresses these predicates.
| Field | Kind | Excluded values | Search |
|---|---|---|---|
Image | ends_with | :\Windows\System32\Taskmgr.exe | excludes:Image field:"Image" value:":\Windows\System32\Taskmgr.exe" |
Image | ends_with | :\Windows\System32\mmc.exe | excludes:Image field:"Image" value:":\Windows\System32\mmc.exe" |
Image | ends_with | :\Windows\System32\resmon.exe | excludes:Image field:"Image" value:":\Windows\System32\resmon.exe" |
Indicators
These rows show field, operator, and value matches.
| Field | Kind | Values | Search |
|---|---|---|---|
ParentImage | ends_with |
| field:"ParentImage" kind:ends_with value:"\taskmgr.exe" |