efsadu.dll
File Encryption Utility file version info
Library on Windows 2 known copies with hashes 1 Sigma rule names it
Is it the real efsadu.dll?
Installed in
C:\Windows\system32\C:\Windows\SysWOW64\Signed byMicrosoft Windows
ProductMicrosoft Windows Operating System, Microsoft Corporation
DescriptionFile Encryption Utility
2 known copies
10.0.19041.1 (WinBuild.160101.0800) · C:\Windows\SysWOW64\efsadu.dll · signed by Microsoft Windows
5ec6aaed85afad68619825e9c19abe39fa852227b2e06b853d86ebadfc513c9610.0.19041.1 (WinBuild.160101.0800) · C:\Windows\system32\efsadu.dll · signed by Microsoft Windows
94d7dbe0e024e9e76b85a3d0e6b089dfcaf82d33334d6ea39ecceec9afa84696From 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 efsadu.dll in 1 rule, for every kind of event; none is a process creation rule CmdID evaluates, so none is listed.