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 Forums >>  Debuggers  >>  Breakpoint on System Restart

Topic created on: May 26, 2007 21:06 CDT by iyegypt .

I need to make a breakpoint on system restart interrupt or any functions that make a system restart any ideas.

  jms     May 27, 2007 23:53.43 CDT
I would first take a look at the imports from C:\WINDOWS\system32\shutdown.exe I noticed from a dumpbin that it has some privilege calls to ntdll.dll as well as the obvious kernel32.TerminateProcess. I am assuming in order to shutdown the system, it elevates its privilege level to something higher than the main system process, and then executes a terminate process on it, but that's just a guess.

Drop shutdown.exe into IDA and see what calls you come up with.

  fileoffset     May 29, 2007 02:38.50 CDT
Heres a list of shutdown related API:

http://msdn2.microsoft.com/en-us/library/aa376883.aspx

If none of these hit you may need to go to a lower level you could try and find the related service ID's and set a breakpoint on INT 2E with the correct service id as a condition...

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