How to figure out which process called a procedure?

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Hi,

I have used a code which hooks ZwQueryDirectryFile in ssdt and whenever this function is called, my function, NewZwQueryDirectryFile, is executed. But I need to know the address of the process which called this function, I've heard sth about EPROCESS Block but I don't know how I can use this to achieve my goal. Is there any way I can find out the process calling this procedure?

P.S.
I am trying to write an anti-virus.

Thank you.

Posted 4-Jun-12 23:27pm

lilyNaz

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JackDingler · Accepted Answer · 2012-06-05T09:41:00

Solution 1

Try GetCurrentProcessId(void);

From there you can call many other system functions, to find additional process information.

If a virus is calling your function, it could reroute any of these system calls...

Good luck in writing an 'anti-virus'. You have a lot of studying ahead of you.

Posted 5-Jun-12 9:41am

JackDingler

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lilyNaz 6-Jun-12 5:46am

Thanks, It worked!