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winrnr.dll

LDAP RnR Provider DLL file version info

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

Is it the real winrnr.dll?

file version info and known copies
Original namewinrnr in the file’s header: a renamed copy still carries it
Installed inC:\Windows\system32\
C:\Windows\SysWOW64\
Signed byMicrosoft Windows
ProductMicrosoft Windows Operating System, Microsoft Corporation
DescriptionLDAP RnR Provider DLL

2 known copies

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

1360c678ed110e378f3d79537426c3c63d62c49f93035bf5629f9e65ebe88780

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

2cbf2ecb536f9f2ce3d8bf58c7270a687d6cb41a2505aee33813908c1730c526

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