said by caffeinator :

It's "MadCodeHook" tool from a legit company, and can/may be used by malware...but is also used by legit programs.

Found this:

»www.softwaretipsandtricks.com/da···sys.html

quote:

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MchInjDrv.sys is a driver for injecting code to other processes.
Publisher is legitimate:
»madshi.net
But it is often used by malicious software.
Kill the file mchInjDrv.sys and remove mchInjDrv.sys from Windows startup.

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Another thread at Kaspersky: »forum.kaspersky.com/lofiversion/···351.html

I guess it depends on what you have installed, or may have installed recently.

You could try uploading to Jotti or Virustotal for more checks.

-CaFF