NCHGBIOS2x64.SYS
BIOS Update Driver For Windows x64 Edition file version info
Driver on Windows LOLDrivers vulnerable driver 1 Sigma rule names it
A known vulnerable driver
T1068Exploitation for Privilege Escalation
2 known samples
4.2.4.0 built by: WinDDK · its entry
314384b40626800b1cde6fbc51ebc7d13e91398be2688c2a58354aa08d00b0734.1.0.0 built by: WinDDK · its entry
7d4ca5760b6ad2e4152080e115f040f9d42608d2c7d7f074a579f911d06c8cf8From 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 NCHGBIOS2x64.SYS?
ProductTOSHIBA BIOS Package, TOSHIBA Corporation
DescriptionBIOS Update Driver For Windows x64 Edition
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.
What detects it
Sigma names NCHGBIOS2x64.SYS in 1 rule, for every kind of event; none is a process creation rule CmdID evaluates, so none is listed.