CmdID / Files

mscorlib.dll

Microsoft Common Language Runtime Class Library file version info

Library on Windows 1 known copy with hashes 1 Sigma rule names it

Is it the real mscorlib.dll?

file version info and known copies

Installed inC:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.8\

Signed byMicrosoft Corporation

ProductMicrosoft .NET Framework, Microsoft Corporation

DescriptionMicrosoft Common Language Runtime Class Library

1 known copy

4.8.4084.0 built by: NET48REL1 · C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.8\mscorlib.dll · signed by Microsoft Corporation

c977324e60809239117fd7b77113fb4dd146198969ce748d6c143ab43d295a58

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