You can follow and disassemble this memory in ollydbg. The device is typically a volume, directory, file, or stream. As is the case with all synchronous calls. In the real DriverEntry , you’ll want to locate where the MajorFunction entries are populated. I’ve searched a little bit, and I understand that this function serves to communicate with the service it just had created.
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The device is typically a volume, directory, file, or stream. Maybe I just didn’t get the question. Brans Ds 1, 14 DeviceIoControl does just that: You can follow and disassemble this memory in ollydbg.
Note the second parameter to this function: Post as a guest Name. As is the case with all synchronous calls.
Email Required, but never shown. Be prepared to swim through a few structures!
c – Calling DeviceIoControl async in kernel – Stack Overflow
Or do I have to move to windbg or some other kernel-mode debugger? A very important concept to understand is the MajorFunction array found in the kernel driver object.
Device and symbolic link creation In order to enable communication between the driver and the application, a device must be created to let the application having a handle to it with the CreateFile function.
Every MajorFunction calls come with the Device and the Irp pointers.
How to as DeviceIoControl() for kernel mode driver | Windows Vista Tips
Deviceiocontrkl Explorer will show the address of the Device Object as noted by Ollydbg. As with file, you must close the handle with the CloseHandle function.
Google “windows drivers asynchronous device io request” and take the first hit. Usage of proper security measures to deal with malware assumed and emphasized from here onward. Press F2 to set a breakpoint, and F9 to run the attached process. To retrieve a handle to the device, you must call the CreateFile function with either the name of a device or the name of the driver associated with a device.
But what kernel mode? Here devixeiocontrol simply tell our driver which function to call if an IRP event occurs. Open ollydbg handle window and find what does the handle point to 0x90 in the above paste – it points to a device: