Breaking Code

April 20, 2012

Hackito Ergo Sum 2012

Filed under: Conferences — Tags: , , , , , , , , , , — Mario Vilas @ 11:27 pm

Hi everyone. Last week I’ve attended Hackito Ergo Sum 2012, and I wanted to share with you some of the things that I found most interesting during the talks. This won’t be a detailed review of each talk, but rather an account of a few details on the talks that I personally found more interesting, in no particular order. If you’re looking for a detailed review of each talk check out this blog.

Oh, by the way. I totally made up the names of the talks. I think it’s more fun that way. :)

The event took place at the headquarters of the French Communist Party, and I have to say the conference room was quite impressive. It was an underground dome all covered with white metallic plates and lamps behind, giving a peculiar visual effect.

An additional advantage of this place is that some security agencies can’t send their spooks there. Hurray to the ridiculously outdated cold war laws! :roll:

One thing I didn’t like though, was that the slides were projected in a sort of tilted curved screen, making it a bit difficult to read the slides unless you were sitting in the middle. I don’t think I was the only one with this problem because I saw a lot of heads tilted sideways… ;)

(more…)

April 9, 2012

MSDN Help Plugin for OllyDbg / Immunity Debugger

Filed under: Tools — Tags: , , , , , , , — Mario Vilas @ 4:49 pm

Hi everyone! I just wrote a quick OllyDbg 1.x plugin and I wanted to share it. If you don’t know what that means, read my other article instead at the Buguroo Blog which has a more detailed explanation on what it is and how to use it. This post is more about why I wrote it and how it works.

Anyway. After a conversation on Twitter about how it’s becoming increasingly harder to find the venerable WIN32.HLP file – and how it was becoming ever more outdated, I came to realize I didn’t know of any OllyDbg plugin to use the more modern and up to date MSDN documentation. I asked around and no one else seems to have written such a plugin, so I wrote my own.

It’s sort of a dirty hack – in general there’s no easy way of overriding existing features in Olly, the plugin API is rather meant to add new functionality. So after messing about with it for a while I came up with an easy hack – the plugin just hooks the WinHelp() API call to detect when WIN32.HLP is about to be opened, and launches the default web browser instead. Any other help file is launched normally.

The next step would be to search the MSDN looking for the API call the user requested. Then again, a quick hack came to the rescue :) since instead of figuring out how to perform MSDN searches it was much easier to just use a Google search with the “I Feel Lucky” button. You can find out more here about the unofficial Google Search API.

The plugin is also compatible with the newer Immunity Debugger which is based in OllyDbg, and was tested on both.

To install, just copy the DLL file in the plugins folder (by default is the same where the main EXE lives). You do need to have set the win32.hlp file in the configuration at some point (so Olly actually tries to open it, otherwise the plugin never finds out). It doesn’t need to be the real file though, any file named “win32.hlp” will do the trick, even if it’s 0 bytes long. :)

Enjoy!

Download

OllyMSDN.zip

April 8, 2012

Quickpost: Installers for BeaEnginePython, Pymsasid, PyDasm and Libdisassemble

Filed under: Tools — Tags: , , , , , , , — Mario Vilas @ 7:25 pm

I’ve packaged the BeaEngine Disassembler along with its Python bindings into a no-frills Windows installer. Certainly easier than manual install, and it really helps me when installing it on virtual machines. :)

Enjoy!

Update: Just added another disassembler package, Pymsasid.

Update: Added precompiled Windows binaries for PyDasm on Python 2.6 and 2.7.

Update: My installers were added to the Python Arsenal for RE. :)

Update: The Pymsasid package was updated with a small change, so the importation works just the same as loading the .py files from the current directory (it’s just an “import *” in __init__.py)

Update: Added a simple setup script for Libdisassemble 2.0. Since I had to put the sources inside a package the import statement in your scripts will have to be adjusted if using this version. With a simple try/except block you can make scripts compatible with both versions as well, if you need to.

Downloads

BeaEngine win32 installer: BeaEnginePython-3.1.0.win32.exe

BeaEngine win64 installer: BeaEnginePython-3.1.0.win-amd64.exe

BeaEngine source installer: BeaEnginePython-3.1.0.zip (run “python setup.py install”)

Libdisassemble 2.0 win32 installer: libdisassemble-2.0.win32.msi

Libdisassemble 2.0 win64 installer: libdisassemble-2.0.win-amd64.msi

Libdisassemble 2.0 source installer: libdisassemble-2.0.zip (run “python setup.py install”)

PyDasm precompiled binaries: PyDasm-1.5-precompiled.zip (run “python setup.py install”)

Pymsasid source installer: pymsasid-0.3.1.zip (run “python setup.py install”)

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