MusNotificationUx.exe
Sources: 300M+ executions observed in the wild.
Summary
Windows Update notification UX process handles the visual interface for Windows Update notifications and restart dialogs.
MusNotificationUx.exe is the 129th most commonly executed Windows program in EchoTrail's dataset, observed 162,432 times across enterprise environments. It typically runs from C:\Windows\System32 and it is most often launched by musnotification.exe.
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The same record for musnotificationux.exe, by REST or as an MCP tool. Free key, no card.
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Behavior
Top Paths
- C:\Windows\System32100%
Top Hashes (SHA256)
- c6921ee57d5744e3fd0a4c5d326766f4c8264713dec58abf887cc2aca9e772ea17.31%
- 36c7c75f76ef9cd794ab5fd14b38753a5f29412503f536802d6170fd546e0a4212.36%
- 3e3e719ff1b3552803c9afd54d8b7ece43ad44c8e01dcc5e97e4cd2c88407ed69%
- 9ec8fe4352189882bf64925835c166a4a2c248c268f8190dd4fa3d887f439a048.36%
- fb76cce7f399261ec2a8e9901d11d3bbdf1bf7ebc9860a9f7e409d3d3c7340f56.7%
- 64ecbbea4a92a6169bb0121cf1d3680827fe3abb73c7e858a9dd62782d0e645c5.78%
- 8672e06014780e1d534e05299fd35b0c0313775adcc397e8760e6367299b59465.02%
- ec8cf187bf1849f81fce8c00dda08fbb0c20ff75c8b7be3d9dc07fdbc461c7cf4%
- 32d50ada292569ca7f23f320e8d2d4daa425d14ccdf77bc5435d2fa45523cc662.75%
- 4db1d0f65d37912c68d09713a93c58281d178332bdc2b4406c965688e2544efd2.73%
Process Ancestry
Top Grandparents
- svchost.exe98.03%
- services.exe1.97%
Top Parents
- musnotification.exe95.27%
- svchost.exe2.37%
- usocoreworker.exe2.35%
- GfxDownloadWrapper.exe<0.01%
- mscorsvw.exe<0.01%
- searchapp.exe<0.01%
- SearchUI.exe<0.01%
- WerFault.exe<0.01%
Security Analysis
What does MusNotificationUx.exe normally do?
Located in C:\Windows\System32 or standard Windows/Office paths. Part of normal Windows or Office operations.
When is MusNotificationUx.exe suspicious?
Running from non-standard paths. Parent process other than expected. Spawning shells or unusual child processes.
How do attackers abuse MusNotificationUx.exe?
Not commonly abused.
Detection guidance
Low priority. Validate path and parent process.
False positive notes
Normal system/Office operation.
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