CmdID / Files

perfos.dll

Windows System Performance Objects DLL file version info

Library on Windows 2 known copies with hashes

Is it the real perfos.dll?

file version info and known copies

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

Signed byMicrosoft Windows

ProductMicrosoft Windows Operating System, Microsoft Corporation

DescriptionWindows System Performance Objects DLL

2 known copies

10.0.19041.488 (WinBuild.160101.0800) · C:\Windows\SysWOW64\perfos.dll · signed by Microsoft Windows

b1813d657dd9a28e7e1ea4f76700f7c99c81fb0da120f89e4670ba86104ba751

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

77bc475c0534ff96ac7805c621cc32ef4aa6dd25d5439b96fccade51eb4d7b22

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.