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Indexed Rules
3,707
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Backends
17
Live from sigconverter.io
CLI Versions
10
Newest: 2.0.2
Translation Workspace
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Active Rule
WSL Child Process Anomaly
Target Profile
Splunk
Splunk SPL & tstats data model queries
Format Mode
Default
Plain SPL queries
Conversion Output
WSL Child Process Anomaly
Using Splunk · Default · sigma-cli 2.0.2
Translation controls
Adjust the rule on the left, then regenerate when you want a fresh backend-native query.
BackendSplunkFormatDefaultVersion2.0.2
title: WSL Child Process Anomaly
id: 2267fe65-0681-42ad-9a6d-46553d3f3480
related:
- id: dec44ca7-61ad-493c-bfd7-8819c5faa09b # LOLBIN Rule
type: derived
status: test
description: Detects uncommon or suspicious child processes spawning from a WSL process. This could indicate an attempt to evade parent/child relationship detections or persistence attempts via cron using WSL
references:
- https://lolbas-project.github.io/lolbas/OtherMSBinaries/Wsl/
- https://twitter.com/nas_bench/status/1535431474429808642
author: Nasreddine Bencherchali (Nextron Systems)
date: 2023-01-23
modified: 2023-08-15
tags:
- attack.execution
- attack.defense-evasion
- attack.t1218
- attack.t1202
logsource:
category: process_creation
product: windows
detection:
selection_parent:
ParentImage|endswith:
- '\wsl.exe'
- '\wslhost.exe'
selection_children_images:
Image|endswith:
# Add more suspicious/uncommon "lolbin" processes
- '\calc.exe'
- '\cmd.exe'
- '\cscript.exe'
- '\mshta.exe'
- '\powershell.exe'
- '\pwsh.exe'
- '\regsvr32.exe'
- '\rundll32.exe'
- '\wscript.exe'
selection_children_paths:
Image|contains:
- '\AppData\Local\Temp\'
- 'C:\Users\Public\'
- 'C:\Windows\Temp\'
- 'C:\Temp\'
- '\Downloads\'
- '\Desktop\'
condition: selection_parent and 1 of selection_children_*
falsepositives:
- Unknown
level: medium
CLI command
Copy the exact command to reproduce this translation locally.
sigma convert --without-pipeline -t splunk -f default rules/windows/process_creation/proc_creation_win_wsl_child_processes_anomalies.yml