Library / Windows
wextract.exe
Win32 Cabinet Self-Extractor · Microsoft Corporation
WindowsSysmon-confirmed
OriginalFilename
WEXTRACT.EXE
Differs from file name
Gotchas
- OriginalFilename doesn't match the file name: a rule using
OriginalFileName: wextract.exenever fires.
Query snippets
logsource:
category: process_creation
product: windows
detection:
selection:
- Image|endswith: '\wextract.exe'
- OriginalFileName: 'WEXTRACT.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="WEXTRACT.EXE " OR Processes.process_name="wextract.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~ ("WEXTRACT.EXE ")
or FileName =~ "wextract.exe"Microsoft Defender XDR advanced hunting. in~ and =~ are case-insensitive.
process where event.type == "start" and
(process.pe.original_file_name in~ ("WEXTRACT.EXE ") or
process.name : "wextract.exe")ECS process.pe.original_file_name is a keyword field: in~ is case-insensitive, Kibana KQL is not.
['wextract.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 |
|---|---|---|---|---|---|---|
| WEXTRACT.EXE | 2 | x64, x86 | 11.0.26100.9549 | Host scan | ✓ 2 |
All 2 parsed builds
| SHA256 | Version | Arch | OriginalFilename | Windows releases | Signature | Source | Sysmon |
|---|---|---|---|---|---|---|---|
| 62b8e323fc7d… | 11.0.26100.9549 | x86 | WEXTRACT.EXE | Host scan | ✓ | ||
| 2e3ddd1019a1… | 11.0.26100.9549 | x64 | WEXTRACT.EXE | Host scan | ✓ |
Winbindex builds link to the Microsoft symbol server copy that was hashed and parsed.