CmdID / Files

FXSST.dll

Fax Service file version info

Library on Windows 1 known copy with hashes 1 Sigma rule names it

Is it the real FXSST.dll?

file version info and known copies

Installed inC:\Windows\system32\

Signed byMicrosoft Windows

ProductMicrosoft Windows Operating System, Microsoft Corporation

DescriptionFax Service

1 known copy

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

3846c1e801053f36eb6fcd99e424a50d4145535276befa11aca78cb4a94fea87

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