Library / Windows
wslhost.exe
Microsoft Windows Subsystem for Linux Background Host · Microsoft Corporation
WindowsParsedSigma refs: 2
OriginalFilename
wslhost.exe
Query snippets
logsource:
category: process_creation
product: windows
detection:
selection:
- Image|endswith: '\wslhost.exe'
- OriginalFileName: 'wslhost.exe'
condition: selectionprocess_creation logsource. Sigma string matching is case-insensitive.
| tstats summariesonly=false count values(Processes.original_file_name) as original_file_name
from datamodel=Endpoint.Processes
where (Processes.original_file_name="wslhost.exe" OR Processes.process_name="wslhost.exe")
by Processes.dest Processes.process_name Processes.process_path Processes.process
| rename Processes.* as *Endpoint.Processes data model. On raw Sysmon events the field is OriginalFileName.
DeviceProcessEvents
| where ProcessVersionInfoOriginalFileName in~ ("wslhost.exe")
or FileName =~ "wslhost.exe"Microsoft Defender XDR advanced hunting. in~ and =~ are case-insensitive.
process where event.type == "start" and
(process.pe.original_file_name in~ ("wslhost.exe") or
process.name : "wslhost.exe")ECS process.pe.original_file_name is a keyword field: in~ is case-insensitive, Kibana KQL is not.
['wslhost.exe'].includes(String(OriginalFileName || '').toLowerCase())Filter expression (JavaScript) for events carrying Sysmon's OriginalFileName field.
Values across builds
| OriginalFilename | Builds | Arch | File version | Windows releases | Source | Sysmon |
|---|---|---|---|---|---|---|
| wslhost.exe | 5 | x64 | 10.0.17134.885 → 10.0.19041.1566 | Win10 1803 → Win10 20H2 (5) | Winbindex |
All 5 parsed builds · 6 Windows release groups not verifiable
| SHA256 | Version | Arch | OriginalFilename | Windows releases | Signature | Source | Sysmon |
|---|---|---|---|---|---|---|---|
| afa8f634ac66… | 10.0.17763.9376 | x64 | wslhost.exe | Win10 1809 | Unsigned | Winbindex | |
| fd7a7e771f3d… | 10.0.19041.1566 | x64 | wslhost.exe | Win10 20H2 | Unsigned | Winbindex | |
| 9b71a406f422… | 10.0.19041.423 | x64 | wslhost.exe | Win10 2004 | Unsigned | Winbindex | |
| 0585ea461802… | 10.0.17134.885 | x64 | wslhost.exe | Win10 1803 | Unsigned | Winbindex | |
| 076b4a4006cd… | 10.0.18362.239 | x64 | wslhost.exe | Win10 1903 | Unsigned | Winbindex |
Winbindex builds link to the Microsoft symbol server copy that was hashed and parsed.