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Topic created on: June 22, 2005 19:51 CDT by dwarkeeper .

Hi,

I am interested in seeing some article/documentation on doing some basic binary auditing when using IDA Pro. I do have some ideas on it but i think there is a big gap in what people do and i wonder if a common series of steps and examples could be created to help consolidate the ideas.

trihuynh		June 22, 2005 23:25.57 CDT
First of all, you need to be patience. You do a lot of work and end up with nothing. The faster way is useing IDA with a debugger and then you can gain more insightful information about how things work, doing a poor deadlisting analysis is time consuming. + For lowing hanging fruit, you can do an IDA search for bad API calls like strcpy,strcat,...there are some IDA scripts around that can do the job for you automatically. You can google for thoses scripts. You never know if you can end up catching some basic overflow or format string bugs. + Another semi low hanging fruit is for signed/unsigned mismatch bug. This can be done by writting a IDA plug-in to do flow analyzing and check the instructions are performed against input data. Too bad, nobody actually publishs such a plug-in so you are on your own for this one. + Heap overflows, logic bugs may require more work. Data flow, graph analysis can be used to fasten the process. You can use commerical product from Sabre security or waiting for some free useful tool ie "Process Stalker" which i hope should be published soon (or never ???). However, as fas as I know, these tools won't help if you do driver/kernel tracing. So you may end up have to write your own tool in this case. The difficulty of reverse engineering tool to find vulnerability is about the extra work that you need to write your tool first before you can even start the bug hunting process. Trust me, it is very time consuming

pedram		June 23, 2005 11:59.10 CDT
Process Stalker will be released, GPLed, in the next 2 weeks or so. The release will be accompanied with an intro-by-example walkthrough.

trihuynh		June 23, 2005 15:44.06 CDT
That's sweet. I am looking forward for the release. Thanks !

peter		June 23, 2005 17:07.38 CDT
I highly recommend reading Reversing: Secrets of Reverse Engineering It may be what you are looking for, by far in my oppinion the best reversing book out there right now. Its sole focus is on reverse engineering as the name implies. Peter~

ryanlrussell		June 23, 2005 17:57.03 CDT
To clarify, by "binary auditing" you mean auditing a binary program for security vulnerabilities? Because if you mean something more general, then there is more advice to be had beyond what has been given so far.

2GooD		June 29, 2005 15:15.49 CDT
First of all, define the goal of the "basic binary auditing"? Second, find ways to automate as much as possible for reaching your goal.

Sellmi		September 23, 2005 07:17.39 CDT
you can also check out the copy-loop plugin from Dennis Elser...it has bugs but anyway it is a nice idea... or search for rep* instructions and also for cmp r8,asciiChar

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