CmdID

CmdID / Files

FXSAPI.dll

Microsoft Fax API Support DLL file version info

Library on Windows 3 known copies with hashes 1 Sigma rule names it

Is it the real FXSAPI.dll?

file version info and known copies
Installed inC:\Windows\system32\
C:\Windows\system32\DriverStore\FileRepository\prnms002.inf_amd64_026ea33d249e474a\Amd64\
C:\Windows\SysWOW64\
Signed byMicrosoft Windows
ProductMicrosoft Windows Operating System, Microsoft Corporation
DescriptionMicrosoft Fax API Support DLL

3 known copies

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

170e4240e66483dffe32beafcb398c2923ea41a52eb17c24462a07538b08f229

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

d216c6e729d1b234e9be5fe65ee79708e163f728247cc0781c8aa9bbe4f379fe

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

e2104c3cb5764d02714d75276c44398c9b7dd0773b2597112f5c1536a56710c9

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