driver_b4f33ffe.sys
Virtual USB bus driver file version info
Driver on Windows LOLDrivers malicious
A known malicious driver
T1068Exploitation for Privilege Escalation
From LOLDrivers (Apache 2.0). A driver is known by its hash: a sample under another name is the same driver. In Ceplin, "<sha256>".whatis() says which sample a hash is.
Is it the real driver_b4f33ffe.sys?
ProductVirtual USB bus driver, Chingachguk & Denger2k
DescriptionVirtual USB bus driver
From the file’s version info, as 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.