CmdID / Files

UIRibbon.dll

Windows Ribbon Framework file version info

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

Is it the real UIRibbon.dll?

file version info and known copies

Installed inC:\Windows\system32\
C:\Windows\SysWOW64\

Signed byMicrosoft Windows

ProductMicrosoft Windows Operating System, Microsoft Corporation

DescriptionWindows Ribbon Framework

2 known copies

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

SHA-256941dcfcd96b3d9799945a5ab1b4d4b7d6859682a0af9df38223568d7f3c46a2fSHA-17d695c8b02551e35abbb6b03ecb5fe0e76c68ee6MD5e8f407e40c03a769ceb5ddd12f217e37

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

SHA-256a18061376c8bdcaa67d775721664e4ef831f04a12d67548f2d92348adca7c791SHA-14ee0866bb83d0c74135d45db2341f9b35a65ba00MD5e47003f06304d7c39e02e8962d11df82

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, "<hash>".whatis() says which known copy an MD5, SHA-1 or SHA-256 is.

What detects it

Sigma rules that name UIRibbon.dll

When it is loaded

highPotential System DLL Sideloading From Non System LocationsNasreddine Bencherchali (Nextron Systems)

CmdID evaluates Sigma’s process creation rules against a command line. These watch what a command line does not show: a library or a driver loading, a file written, the registry, another process opened, event logs. They are listed as Sigma has them, at SigmaHQ.