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ntasn1.dll

Microsoft ASN.1 API file version info

Library on Windows 2 known copies with hashes

Is it the real ntasn1.dll?

file version info and known copies
Installed inC:\Windows\system32\
C:\Windows\SysWOW64\
Signed byMicrosoft Windows
ProductMicrosoft Windows Operating System, Microsoft Corporation
DescriptionMicrosoft ASN.1 API

2 known copies

10.0.19041.1 (WinBuild.160101.0800) · C:\Windows\SysWOW64\ntasn1.dll · signed by Microsoft Windows

20cc8cffdceba3fe8ecfd41338929330ae7ef9aba12656f999469c73b132aa6e

10.0.19041.1 (WinBuild.160101.0800) · C:\Windows\system32\ntasn1.dll · signed by Microsoft Windows

58fd550aa23aed3290d78303889da39fe3bce33513ddbab21624dea575fe927b

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.