ntsdexts.dll

Symbolic Debugger Extensions file version info

Library on Windows 4 known copies with hashes

Is it the real ntsdexts.dll?

file version info and known copies

Original namentsdexts in the file’s header: a renamed copy still carries it

Installed inC:\Program Files (x86)\Windows Kits\10\Debuggers\arm64\winxp\
C:\Program Files (x86)\Windows Kits\10\Debuggers\arm\winxp\
C:\Program Files (x86)\Windows Kits\10\Debuggers\x64\winxp\

Signed byMicrosoft Windows Kits Publisher

ProductMicrosoft Windows Operating System, Microsoft Corporation

DescriptionSymbolic Debugger Extensions

4 known copies

10.0.19041.1 (WinBuild.160101.0800) · C:\Program Files (x86)\Windows Kits\10\Debuggers\arm\winxp\ntsdexts.dll · signed by Microsoft Windows Kits Publisher

59ab2c27697b5106aeef0cf9f8bfd50b12b17737c1f5719af0442520b11d4236

10.0.19041.1 (WinBuild.160101.0800) · C:\Program Files (x86)\Windows Kits\10\Debuggers\x64\winxp\ntsdexts.dll · signed by Microsoft Corporation

c612989d5a4efd8cd8b3511b7d8d30d4642a13a244ff90686ad62bc49bf0bf7a

10.0.19041.1 (WinBuild.160101.0800) · C:\Program Files (x86)\Windows Kits\10\Debuggers\x86\winxp\ntsdexts.dll · signed by Microsoft Corporation

db79d453738a9f5479ee9d090dcc1423672e3761b5c0a0e65681fd434b2d26c6

10.0.19041.1 (WinBuild.160101.0800) · C:\Program Files (x86)\Windows Kits\10\Debuggers\arm64\winxp\ntsdexts.dll · signed by Microsoft Windows Kits Publisher

ff87ac8786244bcf1ec548f3e7c71d0809042cb1db15a747b059e61f95c73d66

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.