CmdID

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diagnostic.dll

Diagnostic Module file version info

Library on Windows 1 known copy with hashes

Is it the real diagnostic.dll?

file version info and known copies
Installed inC:\Windows\system32\oobe\
Signed byMicrosoft Windows
ProductMicrosoft Windows Operating System, Microsoft Corporation
DescriptionDiagnostic Module

1 known copy

10.0.19041.450 (WinBuild.160101.0800) · C:\Windows\system32\oobe\diagnostic.dll · signed by Microsoft Windows

ea64b80f44e4e168e05bc7ed2be85c890e593b72598c71f34bf789a1e49c0ca5

From the file’s version info and the copies recorded by xCyclopedia (MIT). A copy in another folder, signed by someone else or with another hash is not necessarily malicious, but it is worth a closer look. In Ceplin, "<sha256>".whatis() says which known copy a hash is.