MrmCoreR.dll
Microsoft Windows MRM file version info
Library on Windows 2 known copies with hashes 1 Sigma rule names it
Is it the real MrmCoreR.dll?
Original name
MrmCore.dll in the file’s header: a renamed copy still carries itInstalled in
C:\Windows\system32\C:\Windows\SysWOW64\Signed byMicrosoft Windows
ProductMicrosoft Windows Operating System, Microsoft Corporation
DescriptionMicrosoft Windows MRM
2 known copies
10.0.19041.388 (WinBuild.160101.0800) · C:\Windows\SysWOW64\MrmCoreR.dll · signed by Microsoft Windows
609dde23ba204b2e9d4e37f8ffe03d98c0fd067a8afa4b61afcad7db0948b3e410.0.19041.388 (WinBuild.160101.0800) · C:\Windows\system32\MrmCoreR.dll · signed by Microsoft Windows
f0d1f2de9b2238e726bdb8633590b38d1cefd42fa0654d895e84742d007ac92cFrom 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 MrmCoreR.dll in 1 rule, for every kind of event; none is a process creation rule CmdID evaluates, so none is listed.