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fontsub.dll

Font Subsetting DLL file version info

Library on Windows 2 known copies with hashes

Is it the real fontsub.dll?

file version info and known copies
Original namefontsub in the file’s header: a renamed copy still carries it
Installed inC:\Windows\system32\
C:\Windows\SysWOW64\
Signed byMicrosoft Windows
ProductMicrosoft Windows Operating System, Microsoft Corporation
DescriptionFont Subsetting DLL

2 known copies

10.0.19041.508 (WinBuild.160101.0800) · C:\Windows\system32\fontsub.dll · signed by Microsoft Windows

1b4160b63e7fb8db4e15912ffadbf7f22ca128ebf3f98656c0adfd182b09aa3f

10.0.19041.508 (WinBuild.160101.0800) · C:\Windows\SysWOW64\fontsub.dll · signed by Microsoft Windows

b88072a7ce6755d2c00de4086237c78a27954a0293a0d0007f037807f7a71eef

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.