KernelBase.dll
Windows NT BASE API Client DLL file version info
Library on Windows 2 known copies with hashes 2 Sigma rules name it
Is it the real KernelBase.dll?
C:\Windows\system32\C:\Windows\SysWOW64\2 known copies
10.0.19041.488 (WinBuild.160101.0800) · C:\Windows\SysWOW64\KernelBase.dll · signed by Microsoft Windows
92ec87598325686fc3b9edfa8714a2996b6e147d830fa4fcac313fcd16b6873e10.0.19041.388 (WinBuild.160101.0800) · C:\Windows\system32\KernelBase.dll · signed by Microsoft Windows
d42c04dd7f8c78f7fd6e3508cada50c077b5485871adb76fcda98be46e0fc9acFrom 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 KernelBase.dll in 2 rules, for every kind of event; none is a process creation rule CmdID evaluates, so none is listed.