vssapi.dll
Microsoft Volume Shadow Copy Requestor/Writer Services API DLL file version info
Library on Windows 2 known copies with hashes 2 Sigma rules name it
Is it the real vssapi.dll?
C:\Windows\system32\C:\Windows\SysWOW64\2 known copies
10.0.19041.1 (WinBuild.160101.0800) · C:\Windows\SysWOW64\vssapi.dll · signed by Microsoft Windows
7fae1f44d444a22fda069c101416cbfb4dd537053db6d5b887c944a83cf39cc510.0.19041.1 (WinBuild.160101.0800) · C:\Windows\system32\vssapi.dll · signed by Microsoft Windows
b855f615114a1294bfd927efac262e0daf388be4519dc70b1085b1f5028402cfFrom 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 vssapi.dll in 2 rules, for every kind of event; none is a process creation rule CmdID evaluates, so none is listed.