Library / Windows
w32tm.exe
Windows Time Service Diagnostic Tool · Microsoft Corporation
WindowsSysmon-confirmedSigma refs: 1
OriginalFilename
w32time.dll
Differs from file nameNames a DLL
Gotchas
- OriginalFilename names a DLL (
w32time.dll), not an executable. Rules expecting.exevalues miss it. - OriginalFilename doesn't match the file name: a rule using
OriginalFileName: w32tm.exenever fires.
Query snippets
logsource:
category: process_creation
product: windows
detection:
selection:
- Image|endswith: '\w32tm.exe'
- OriginalFileName: 'w32time.dll'
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="w32time.dll" OR Processes.process_name="w32tm.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~ ("w32time.dll")
or FileName =~ "w32tm.exe"Microsoft Defender XDR advanced hunting. in~ and =~ are case-insensitive.
process where event.type == "start" and
(process.pe.original_file_name in~ ("w32time.dll") or
process.name : "w32tm.exe")ECS process.pe.original_file_name is a keyword field: in~ is case-insensitive, Kibana KQL is not.
['w32time.dll'].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 |
|---|---|---|---|---|---|---|
| w32time.dll | 14 | x64, x86 | 10.0.10240.16384 → 10.0.28000.2804 | Win10 1507 → Win11 26H1 (7) | Host scan, Winbindex | ✓ 2 |
All 14 parsed builds · 26 Windows release groups not verifiable
| SHA256 | Version | Arch | OriginalFilename | Windows releases | Signature | Source | Sysmon |
|---|---|---|---|---|---|---|---|
| 3fa10d25d98d… | 10.0.28000.2804 | x64 | w32time.dll | Win11 26H1 | Unsigned | Winbindex | |
| 37f8056ad80c… | 10.0.28000.2804 | x86 | w32time.dll | Win11 26H1 | Unsigned | Winbindex | |
| 6aec23acacd5… | 10.0.26100.9549 | x86 | w32time.dll | Win11 24H2 | Unsigned | Host scan, Winbindex | ✓ |
| 4f5d676f3635… | 10.0.26100.9549 | x64 | w32time.dll | Win11 24H2 | Unsigned | Host scan, Winbindex | ✓ |
| 496e0dfd222d… | 10.0.26100.4202 | x64 | w32time.dll | Win11 24H2, Win11 25H2 | Unsigned | Winbindex | |
| 2920e8df32e1… | 10.0.26100.4202 | x86 | w32time.dll | Win11 24H2, Win11 25H2 | Unsigned | Winbindex | |
| c71b4316bf6e… | 10.0.17763.719 | x64 | w32time.dll | Win10 1809 | Unsigned | Winbindex | |
| b98bde1672d5… | 10.0.17763.719 | x86 | w32time.dll | Win10 1809 | Unsigned | Winbindex | |
| c879ce7de155… | 10.0.14393.0 | x86 | w32time.dll | Win10 1607 | Unsigned | Winbindex | |
| 6b71a1db48da… | 10.0.14393.0 | x64 | w32time.dll | Win10 1607 | Unsigned | Winbindex | |
| f21dda9313c4… | 10.0.10586.0 | x64 | w32time.dll | Win10 1511 | Unsigned | Winbindex | |
| 2f1016122024… | 10.0.10586.0 | x86 | w32time.dll | Win10 1511 | Unsigned | Winbindex | |
| 7481b61d95c4… | 10.0.10240.16384 | x64 | w32time.dll | Win10 1507 | Unsigned | Winbindex | |
| 0c5aba74f772… | 10.0.10240.16384 | x86 | w32time.dll | Win10 1507 | Unsigned | Winbindex |
Winbindex builds link to the Microsoft symbol server copy that was hashed and parsed.