TiWorker.exe
Summary
Windows Modules Installer Worker (TiWorker.exe) performs Windows Update installation and component servicing tasks. It is the worker process for TrustedInstaller and handles the heavy lifting of applying updates.
TiWorker.exe is the 47th most commonly executed Windows program in EchoTrail's dataset, observed 817,443 times across enterprise environments. It typically runs from C:\Windows\WinSxS\amd64_microsoft-windows-servicingstack_31bf3856ad364e35_6.3.9600.18384_none_fa1d93c39b41b41a and it is most often launched by svchost.exe.
Behavior
Top Paths
- C:\Windows\WinSxS\amd64_microsoft-windows-servicingstack_31bf3856ad364e35_6.3.9600.18384_none_fa1d93c39b41b41a15.64%
- C:\Windows\WinSxS\amd64_microsoft-windows-servicingstack_31bf3856ad364e35_6.3.9600.21562_none_fabae880b450ccda4.45%
- C:\Windows\WinSxS\amd64_microsoft-windows-servicingstack_31bf3856ad364e35_10.0.17763.4121_none_5703f42b990865ed3.75%
- C:\Windows\WinSxS\amd64_microsoft-windows-servicingstack_31bf3856ad364e35_10.0.17763.164_none_7e114a3d4d0589d43.28%
- C:\Windows\WinSxS\amd64_microsoft-windows-servicingstack_31bf3856ad364e35_6.3.9600.19651_none_fa3af1939b2c25582.78%
- C:\Windows\WinSxS\amd64_microsoft-windows-servicingstack_31bf3856ad364e35_6.3.9600.20874_none_fab235a2b456f94d2.73%
- C:\Windows\WinSxS\amd64_microsoft-windows-servicingstack_31bf3856ad364e35_10.0.14393.5771_none_7ee250a22208ec932.07%
- C:\Windows\WinSxS\amd64_microsoft-windows-servicingstack_31bf3856ad364e35_6.3.9600.21013_none_faf1eee8b42768b91.97%
- C:\Windows\WinSxS\amd64_microsoft-windows-servicingstack_31bf3856ad364e35_10.0.19041.740_none_e752aa59261f271f1.96%
- C:\Windows\WinSxS\amd64_microsoft-windows-servicingstack_31bf3856ad364e35_10.0.19041.1022_none_7e372e9e7c6ecccb1.63%
Top Hashes (SHA256)
- 7cc977d574720b6267030469aa589b9b7ebf0b108a4b024a54429dff9d633d3518.71%
- 4b1d93a40ca47fc007e35988c34bb572ff4aa23832510078f7110d7054b0a2876.71%
- 86631367ec6a64a5c1b12012442c98b1df05ef3ca4c01c78b93c04c577a539fd4.69%
- 138435960f0717184f933aed18cb27773a6acb4f6028c14a7381efbd343185ba4.37%
- 27560826969f4dde5ae5c509da9069dc6e5408d08e312a6408cb69ed983951e23.94%
- 4b559fa5afe54a9a6e09afb12b75c4aba39639c7d9d98e3785c364fe02eab7982.18%
- f454f9dd68e571115f291de6be7acd8678711a030537aa90bc959cb83b32de522.06%
- 18a56c58b18030c70492189d7de2d1813e363b1fb6c59756b4e81e1071492a0e1.72%
- 02fe1dc5d4ffe4ca34e630ee1d5cb6c717ffa0abec77776257009eb8d3f4aba81.71%
- 962756944dc5fdeee8aa2373d3fce0085e190d74f4d49b15d8b5978b783634661.67%
Process Ancestry
Top Grandparents
- services.exe100%
Top Parents
- svchost.exe99.92%
Top Children
- makecab.exe46.11%
- ngen.exe19.17%
- wermgr.exe14.09%
- poqexec.exe9.95%
- iissetup.exe4.06%
- netcfg.exe2.5%
- SrTasks.exe2.08%
- mcbuilder.exe0.57%
- aspnetca.exe0.38%
Rare or environment-specific process names are omitted from ancestry tables. Percentages are of all observed relationships.
Security Analysis
What does TiWorker.exe normally do?
Located in C:\Windows\System32 or standard Windows/Office paths. Part of normal Windows or Office operations.
When is TiWorker.exe suspicious?
Running from non-standard paths. Parent process other than expected. Spawning shells or unusual child processes.
How do attackers abuse TiWorker.exe?
Not commonly abused.
Detection guidance
Low priority. Validate path and parent process.
False positive notes
Normal system/Office operation.
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Data from EchoTrail's dataset of ~346M Windows process executions. Last extracted 2026-08-04.