CmdID

CmdID / Files

osuninst.dll

Uninstall Interface file version info

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

Is it the real osuninst.dll?

file version info and known copies
Installed inC:\Windows\system32\
C:\Windows\SysWOW64\
Signed byMicrosoft Windows
ProductMicrosoft Windows Operating System, Microsoft Corporation
DescriptionUninstall Interface

2 known copies

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

b03575fb8956c41609ab097ae67eb8bf8e0508b4095ca9fd3995dd4668ff1e56

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

cb0a77b72d6b2b32719cd9fb38c55650259437bc8271ecd4ea382352b096e6c4

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