msacm32.dll
Microsoft ACM Audio Filter file version info
Library on Windows 2 known copies with hashes 1 Sigma rule names it
Is it the real msacm32.dll?
Original name
msfltr32.acm 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 ACM Audio Filter
2 known copies
10.0.19041.1 (WinBuild.160101.0800) · C:\Windows\SysWOW64\msacm32.dll · signed by Microsoft Windows
2326a189fbf37f064541a74ba7c397eea18a636a81c00cd66cb832178baa838f10.0.19041.1 (WinBuild.160101.0800) · C:\Windows\system32\msacm32.dll · signed by Microsoft Windows
5d8dfeffdadae26ab25d15aa84896faa4d0fb8276f0bdc31799681559a99dabaFrom 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 msacm32.dll in 1 rule, for every kind of event; none is a process creation rule CmdID evaluates, so none is listed.