Library / Windows
mcbuilder.exe
Resource cache builder tool · Microsoft Corporation
WindowsSysmon-confirmed
OriginalFilename
mcbuilder.exe
Query snippets
logsource:
category: process_creation
product: windows
detection:
selection:
- Image|endswith: '\mcbuilder.exe'
- OriginalFileName: 'mcbuilder.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="mcbuilder.exe" OR Processes.process_name="mcbuilder.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~ ("mcbuilder.exe")
or FileName =~ "mcbuilder.exe"Microsoft Defender XDR advanced hunting. in~ and =~ are case-insensitive.
process where event.type == "start" and
(process.pe.original_file_name in~ ("mcbuilder.exe") or
process.name : "mcbuilder.exe")ECS process.pe.original_file_name is a keyword field: in~ is case-insensitive, Kibana KQL is not.
['mcbuilder.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 |
|---|---|---|---|---|---|---|
| mcbuilder.exe | 2 | x64, x86 | 10.0.26100.3037 → 10.0.26100.3624 | Host scan | ✓ 2 |
All 2 parsed builds
| SHA256 | Version | Arch | OriginalFilename | Windows releases | Signature | Source | Sysmon |
|---|---|---|---|---|---|---|---|
| cb6f9b4ef926… | 10.0.26100.3624 | x86 | mcbuilder.exe | Host scan | ✓ | ||
| 7f6058a0c4fe… | 10.0.26100.3037 | x64 | mcbuilder.exe | Host scan | ✓ |
Winbindex builds link to the Microsoft symbol server copy that was hashed and parsed.