PrintIsolationProxy.dll
Print Sandbox COM Proxy Stub file version info
Library on Windows 1 known copy with hashes 1 Sigma rule names it
Is it the real PrintIsolationProxy.dll?
Original name
PrintSandboxProxy.dll in the file’s header: a renamed copy still carries itInstalled in
C:\Windows\system32\Signed byMicrosoft Windows
ProductMicrosoft Windows Operating System, Microsoft Corporation
DescriptionPrint Sandbox COM Proxy Stub
1 known copy
10.0.19041.1 (WinBuild.160101.0800) · C:\Windows\system32\PrintIsolationProxy.dll · signed by Microsoft Windows
9a1c6a51ec97fe3a30d79ac3dc5ff3468291d1cb786f4a45997ace23c028fd91From 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 PrintIsolationProxy.dll in 1 rule, for every kind of event; none is a process creation rule CmdID evaluates, so none is listed.