iernonce.dll
Extended RunOnce processing with UI file version info
Library on Windows 2 known copies with hashes 1 Sigma rule names it
Is it the real iernonce.dll?
C:\Windows\system32\C:\Windows\SysWOW64\2 known copies
11.00.19041.1 (WinBuild.160101.0800) · C:\Windows\SysWOW64\iernonce.dll · signed by Microsoft Windows
80ca366b88c0e69c26d3cbefd047d4e2bc800b75335a2dd54eee2c418e4a61dc11.00.19041.1 (WinBuild.160101.0800) · C:\Windows\system32\iernonce.dll · signed by Microsoft Windows
d413e661057686d8d288be66154e1c05deffae08e3316e3fb0c41fadc3900ea8From 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 iernonce.dll in 1 rule, for every kind of event; none is a process creation rule CmdID evaluates, so none is listed.