Profiler 2.4

Profiler 2.4 is out with the following news:

added initial support for PDB files (including export of types)
added support for Windows Encoded Scripts (VBE, JSE)
– introduced fixed xml structures
added automatic string decoding in struct tables
added Python string command line execution
– remember the last selected logic group
– fixed missing support for wchar_t in C types
– updated Qt to 5.4.1
– various bug fixes

While the most important newly introduced feature is the support for PDB files, here are some interesting new features:

Support for Windows Encoded Scripts (VBE, JSE)

Windows encoded scripts like VBE and JSE files (the encoded variants of VBS and JS script files) are now supported and automatically decoded.

In the screen-shot you can see the decoded output of an encoded file (showed at the bottom).

Automatic string decoding in struct tables

A very basic feature: byte-arrays in structures are automatically checked for strings and in case decoded.

(notice the section name automatically displayed as ascii string)

Python string command line execution

Apart from executing script files passed as command line arguments, now it is also possible to execute Python statements directly passed as argument.

For instance:

The optional argument ‘-c’ specifies to not display the UI.

Enjoy!

Command-line scripting

The upcoming 2.1 version of Profiler adds support for command-line scripting. This is extremely useful as it enables users to create small (or big) utilities using the SDK and also to integrate those utilities in their existing tool-chain.

The syntax to run a script from command-line is the following:

If we want to run a specific function inside a script, the syntax is:

This calls the function ‘bar’ inside the script ‘foo.py’.

Everything following the script/function is passed on as argument to the script/function itself.

When no function is specified, the arguments can be retrieved from sys.argv.

For the command-line above the output would be:

When a function is specified, the number of arguments are passed on to the function directly:

If you actually try one of these examples, you’ll notice that Profiler will open its main window, focus the output view and you’ll see the output of the Python print functions in there. The reason for this behaviour is that the command-line support also allows us to instrument the UI from command-line. If we want to have a real console behaviour, we must also specify the ‘-c’ parameter. Remember we must specify it before the ‘-r’ one as otherwise it will be consumed as an argument for the script.

However, on Windows you won’t get any output in the console. The reason for that is that on Windows applications can be either console or graphical ones. The type is specified statically in the PE format and the system acts accordingly. There are some dirty tricks which allow to attach to the parent’s console or to allocate a new one, but neither of those are free of glitches. We might come up with a solution for this in the future, but as for now if you need output in console mode on Windows, you’ll have to use another way (e.g. write to file). Of course, you can also use a message box.

But a message box in a console application usually defies the purpose of a console application. Again, this issue affects only Windows.

So, let’s write a small sample utility. Let’s say we want to print out all the import descriptor module names in a PE. Here’s the code:

Running the code above with the following command line:

Produces the following output:

Of course, this is not a very useful utility. But it’s just an example. It’s also possible to create utilities which modify files. There are countless utilities which can be easily written.

Another important part of the command-line support is the capability to register logic providers on the fly. Which means we can force a custom scan logic from the command-line.

This script scans a single file given to it as argument. All callbacks, aside from init, are optional (they default to None).

That’s all! Expect the new release soon along with an additional supported platform. 🙂