dnsapi.dll
DNS Client API DLL file version info
Library on Windows 2 known copies with hashes 1 Sigma rule names it
Is it the real dnsapi.dll?
Original name
dnsapi 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
DescriptionDNS Client API DLL
2 known copies
10.0.19041.508 (WinBuild.160101.0800) · C:\Windows\SysWOW64\dnsapi.dll · signed by Microsoft Windows
1df0241421ab302c3086da54d6eb100b0cd155426bf640c3f0ce8620f79b6d1910.0.19041.1 (WinBuild.160101.0800) · C:\Windows\system32\dnsapi.dll · signed by Microsoft Windows
26b49242879cabd209a5b314a196672fe25e22ca5288c03aa0944d6f235810d5From 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 dnsapi.dll in 1 rule, for every kind of event; none is a process creation rule CmdID evaluates, so none is listed.