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zstd.dll

Zstandard - Fast and efficient compression algorithm file version info

Library on Windows 1 known copy with hashes

Is it the real zstd.dll?

file version info and known copies
Original namelibzstd.dll in the file’s header: a renamed copy still carries it
Installed inC:\Program Files\Wireshark\
Signed byWireshark Foundation
ProductZstandard, Yann Collet, Facebook, Inc.
DescriptionZstandard - Fast and efficient compression algorithm

1 known copy

1.4.0 · C:\Program Files\Wireshark\zstd.dll · signed by Wireshark Foundation

d17d753dc6bff4d8cf9bc0752ca592f3d17c3b216238fa6ff0646b57b9e9dddf

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.