WFSR.dll
Windows Fax and Scan Resources file version info
Library on Windows 1 known copy with hashes 1 Sigma rule names it
Is it the real WFSR.dll?
Installed in
C:\Windows\system32\Signed byMicrosoft Windows
ProductMicrosoft Windows Operating System, Microsoft Corporation
DescriptionWindows Fax and Scan Resources
1 known copy
10.0.19041.1 (WinBuild.160101.0800) · C:\Windows\system32\WFSR.dll · signed by Microsoft Windows
869b8dbc0f533379fb336b06172ea9c12d2051fa0ca0a14cfee85729faaacf8eFrom 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 names WFSR.dll in 1 rule, for every kind of event; none is a process creation rule CmdID evaluates, so none is listed.