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 Forums >>  IDA Pro  >>  breakpoint based on Win32 APIs

Topic created on: January 21, 2009 23:05 CST by researchmalware .

Hi Friends,

While debugging a malware, I used to set breakpoints on Windows API. Like setting breakpoint on WS2_32.SOcket, or setting breakpoint on RegSetValue, etc using OllyDbg. How to do that in IDA pro?

Thanks in advance!

  nezumi     January 22, 2009 07:53.06 CST
in debugger:
debugger => module list;
module name => function name => double click;
F2 to set breakpoint;

NOTE 1: better to set breakpoint to second or third instruction (some protection check for software breakpoint at the beginning of api function).

NOPE 2: IDA-Pro recognizes library functions, so breakpoint them as well, especially if you're dealing with Borland stuff. (see: Baghdad - dead alive breakpoints)

P.S. I wrote a simple script to set breakpoint on any api func, supporting configurable text file with the most popular api functions, but can't find it fast, but it's really simple.

btw, IDA-Pro support names written in the following style: ModuleName_FunctionName, for example, to set software breakpoint on KERNEL32!CreateFileA just press Shift-F2 (console) and type: AddBptEx(LocByName("kernel32_CreateFileA"),1, BPT_SOFT);

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