defragproxy.dll
Microsoft Drive Optimizer Proxy Library file version info
Library on Windows 1 known copy with hashes 1 Sigma rule names it
Is it the real defragproxy.dll?
Installed in
C:\Windows\system32\Signed byMicrosoft Windows
ProductMicrosoft Windows Operating System, Microsoft Corporation
DescriptionMicrosoft Drive Optimizer Proxy Library
1 known copy
10.0.19041.488 (WinBuild.160101.0800) · C:\Windows\system32\defragproxy.dll · signed by Microsoft Windows
8c12590dae21c5427d2d69596c2fa49e372d202b4d5ce8ac0a928b4bd09a589bFrom 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 defragproxy.dll in 1 rule, for every kind of event; none is a process creation rule CmdID evaluates, so none is listed.