CmdID

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ntdsapi.dll

Active Directory Domain Services API file version info

Library on Windows 2 known copies with hashes 1 Sigma rule names it

Is it the real ntdsapi.dll?

file version info and known copies
Installed inC:\Windows\system32\
C:\Windows\SysWOW64\
Signed byMicrosoft Windows
ProductMicrosoft Windows Operating System, Microsoft Corporation
DescriptionActive Directory Domain Services API

2 known copies

10.0.19041.1 (WinBuild.160101.0800) · C:\Windows\system32\ntdsapi.dll · signed by Microsoft Windows

3c24c9eeb2bb4ca8b870910be6ea77891099e26dd12a8b07d0204e6277610974

10.0.19041.1 (WinBuild.160101.0800) · C:\Windows\SysWOW64\ntdsapi.dll · signed by Microsoft Windows

8a5265cc76c1e1595caea0e663ed6f1dce9aa58f9530a7bca6938769e8e13863

From 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

Sigma names ntdsapi.dll in 1 rule, for every kind of event; none is a process creation rule CmdID evaluates, so none is listed.