CmdID

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FXSTIFF.dll

Microsoft Fax TIFF library file version info

Library on Windows 2 known copies with hashes 1 Sigma rule names it

Is it the real FXSTIFF.dll?

file version info and known copies
Installed inC:\Windows\system32\
C:\Windows\system32\DriverStore\FileRepository\prnms002.inf_amd64_026ea33d249e474a\Amd64\
Signed byMicrosoft Windows
ProductMicrosoft Windows Operating System, Microsoft Corporation
DescriptionMicrosoft Fax TIFF library

2 known copies

10.0.19041.508 (WinBuild.160101.0800) · C:\Windows\system32\DriverStore\FileRepository\prnms002.inf_amd64_026ea33d249e474a\Amd64\FXSTIFF.DLL · signed by Microsoft Windows

e78eeeaf63a4e057039d02021439057c68cc82f7f721836b584ab5623e5beee4

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

b7c2049df82a8a1d9ac0c39f9d4d8815aac453220dc2acd9ad3c4b83ad1ba153

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.

What detects it

Sigma

Sigma names FXSTIFF.dll in 1 rule, for every kind of event; none is a process creation rule CmdID evaluates, so none is listed.