Decompiling An Autoit Exe

UPDATE UPDATE: Fixed the URL for getting the latest version – apparently the forum site moved. Categories, Tags.

•, SICE to friends. Commercial and development stopped in 2006.

Does anyone know if their is a hack/crack for decompiling the latest version of autoit 3.3.00 exe files? So that one can convert the exe to the.au3 source. An.exe file is an executable program file that is compatible with the Windows operating systems. An.au3 file is a script created in AutoIt v3. This program creates scripts to automate Windows functions such as keystrokes or mouse movements, and compiles these scripts into.exe executables.

Where can I find the decompiler? If the version of AutoIt is v3.2.5.1 or lower, then the decompiler is located at C: Program Files AutoIt3 Extras Exe2Aut Exe2Aut.exe by default. The directory may be different if you performed a custom installation. For all other newer versions, the decompiler has been removed. What if I need to decompile a script compiled with a newer version of AutoIt? You are mostly out of luck. Take the opportunity to learn how to properly back up your important files.

Personally, I roll with Olly, WinDbg & W32Dasm, and some smaller utility tools. Also, remember that disassembling or even debugging other people's software is usually against the EULA in the very least:). Psoul's excellent post answers to your question so I won't replicate his good work, but I feel it'd help to explain why this is at once a perfectly valid but also terribly silly question.

The official decompiler will only decompile scripts compiled with AutoIt v3.2.5.1 and earlier. Any script compiled with a version later than that will not decompile. Where can I find the decompiler? If the version of AutoIt is v3.2.5.1 or lower, then the decompiler is located at C: Program Files AutoIt3 Extras Exe2Aut Exe2Aut.exe by default. The directory may be different if you performed a custom installation.

If I posted any code, assume that code was written using the latest release version unless stated otherwise. Also, if it doesn't work on XP I can't help with that because I don't have access to XP, and I'm not going to.

I just don’t like running some random AutoIt script without being able to look at the source code. If I run a “normal” compiled app, my virus scanner will generally let me know if it’s safe to run. But a script written in AutoIt can so easily be a trojan (or other destructive tool) and nothing can likely catch it because of the nature of scripted programs. Yes, I’m aware somebody could write a C++ app that’s just as dangerous as AutoIt can produce, but this requires a lot more intelligence and effort than just writing an AutoIt script.

If you deviated from the default install path, you can search your program files for Exe2Aut.exe Step Run the decompiler program. Browse to the.exe compiled script and run the program. This should extract the.au3 script from the.exe.

Yes, I’m aware somebody could write a C++ app that’s just as dangerous as AutoIt can produce, but this requires a lot more intelligence and effort than just writing an AutoIt script. AutoIt is made to be pretty friendly for non-programmers.

Of course, there are techniques that allows us to slow an attacker down, which might or might not be enough. But 'slowing' doesn't mean 'preventing', and that's a topic of another article. That's from me regarding the topic of decompilation, I hope you learned something new today and, hopefully, this knowledge will help you to better protect your software. Know your enemy before going into battle. Because it's the battle for your own time.

* Posting any script that has been decompiled by a 3rd-party decompiler. This includes decompiling scripts users have posted in binary-only form. Under no circumstances are scripts to be decompiled unless the author grants their explicit permission and the script can be decompiled with the official decompiler. Are my compiled scripts safe? Any unscrupulous user may decompile your compiled script. There is not much you can do to stop decompilation.

Or at least partially. And at least in theory. So I said you can’t debug it, because you can’t actually do anything useful with it. Because if you modify the assembler instructions you see in OllyDbg, even save them they are no use. Because you need the virtual environment in order to run it.

I’m a huge fan of – I think the program is a wonderful tool for administrators as well as casual programmers who just like to mess with stuff. However, I recently discovered that the developer of AutoIt, in an ongoing quest for “security,” has disabled the ability to reverse-engineer autoit scripts! Now, I’m all for security when people write software, but giving scripts this level of security actually introduces security risks!

With a decompiler, you can turn a program back into partial source code, assuming you know what it was written in (which you can find out with free tools such as - if the program is packed, you'll have to unpack it first OR if you can't find PEiD anywhere. DIE has a strong developer community on currently). Debuggers: •, free, a fine 32-bit debugger, for which you can find numerous user-made plugins and scripts to make it all the more useful. •, free, a quite capable debugger by Microsoft. WinDbg is especially useful for looking at the Windows internals, since it knows more about the data structures than other debuggers.

If you had a quick answer on this I’d appreciate it again! (don’t have to be a long answer, just tell me “no you are wrong” (if you are 100% sure;) ) I’ll figure out the details by myself then. Hi, You can see it, but you can’t work with it. Think about it. In a C++ application, the physical executable file can easily be read because OllyDbg can understand the binary instructions. You can modify the instructions and save an executable.

You'll have to look around to find the best version. Decompilers: • Visual Basic:, commercial, produces somewhat identifiable bytecode. • Delphi:, free, produces good quality source code. • C:, commercial, a plugin for IDA Pro by the same company. Produces great results but costs a big buck, and won't be sold to just anyone (or so I hear). •.NET(C#):, free, decompiles.NET 1.0-4.5 assemblies to C#.

Each action a processor can take (e.g., read from memory, add two values) is represented by a numeric code. If I told you that the number 1 meant scream and the number 2 meant giggle, and then held up cards with either 1 or 2 on them expecting you to scream or giggle accordingly, I would be using what is essentially the same system a computer uses to operate. A binary file is just a set of those codes (usually call 'op codes') and the information ('arguments') that the op codes act on. Now, assembly language is a computer language where each command word in the language represents exactly one op-code on the processor. There is a direct 1:1 translation between an assembly language command and a processor op-code. This is why coding assembly for an x386 processor is different than coding assembly for an ARM processor.

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You can't at once permit the computer reading the program data and also forbid the computer reading the program data. (Don't get me wrong, there have been attempts to do so. They work as well as DRM on song files.) However, there are caveats to the disassembly approach. Variable names are non-existent; such a thing doesn't exist to your CPU. Library calls are confusing as hell and often require disassembling further binaries.

For example, check the following screenshot of its assembly view: As you can see it is more structured, the various jumps are visualized like graph nodes which facilitates navigation. Read more: Decompiling a C++ executable using IDA Which brings us to the question “Is it possible to decompile native image in a way that an understandable source code can be generated?”. The short answer is no.

But a script written in AutoIt can so easily be a trojan (or other destructive tool) and nothing can likely catch it because of the nature of scripted programs. Yes, I’m aware somebody could write a C++ app that’s just as dangerous as AutoIt can produce, but this requires a lot more intelligence and effort than just writing an AutoIt script. AutoIt is made to be pretty friendly for non-programmers. So to me, this is an absurd limitation – all scripts should be reversible for the sake of security! Luckily for the world, somebody has written a usable decompiler called myAutToExe, and I’m providing a local copy of since the site is hard to find and hosted on Angelfire. For the original and latest versions, go to. Note: I haven’t contacted the author of myAutToExe about this (the page has no contact information).

Any unscrupulous user may decompile your compiled script. There is not much you can do to stop decompilation. A determined user will get your source code if they truly want it. I designed a counter-measure to break the 3rd-party decompiler, may I share it?

I guess you're talking about PicturesToExe deluxe? In that case, you've probably tried to use the same program to extract the photos.

Assembly code (after executed, produced by the JIT) 4. You can read more about that here Hope this helps. I knew I’d have a second thought on this. Or I should rather call it a bigger doubt? You say: “When this assembly gets executed, the JIT (Just in time) compiler creates the actual assembler code and the binary instructions for the processor to execute. But this happens runtime.” And the question is. Doesn’t Ollydbg operates at application runtime?

•, SICE to friends. Commercial and development stopped in 2006. SoftICE is kind of a hardcore tool that runs beneath the operating system (and halts the whole system when invoked). SoftICE is still used by many professionals, although might be hard to obtain and might not work on some hardware (or software - namely, it will not work on Vista or NVIDIA gfx cards).

I designed a counter-measure to break the 3rd-party decompiler, may I share it? It is theoretically possible to modify compiled scripts in a way that it still works but a decompiler fails to extract the source. However, tools that are capable of doing this violate the reverse engineering clause of the AutoIt license (the very same clause the 3rd-party decompiler violates). Where in the AutoIt license does it mention decompilation? This clause: Reverse engineering.

Disassembling and modifying a C++ executable For our example I’ve created a simple C++ application with basic I/O. } We’ll need to disassemble, debug and optionally decompile our example. Download the following tools that will help us to do that: • • I’ve compiled this example which you can download from. When we start it we see the following simple console application: It asks for some predefined input. If the wrong code is entered, the following output is presented: “Try again” Let’s pretend that we don’t have the source code and we don’t know the code. So what can we do?

What it generates is pseudo C code. Let me show you the output of the small example program. } So, can we decompile a native image into an understandable source code? Depends on your idea of 'understandable'. You have to devote a lot of time and you need to posses serious knowledge of the APIs your operation system use, along with understanding of the C and Assembly syntax.

There is not much you can do to stop decompilation. A determined user will get your source code if they truly want it. I designed a counter-measure to break the 3rd-party decompiler, may I share it? It is theoretically possible to modify compiled scripts in a way that it still works but a decompiler fails to extract the source.

I can’t imagine he’d complain, but if anybody knows a way in which I can contact him, I’m all ears. I’d love to set up a proper mirror.

WinDbg is especially useful for looking at the Windows internals, since it knows more about the data structures than other debuggers. •, SICE to friends. Commercial and development stopped in 2006. SoftICE is kind of a hardcore tool that runs beneath the operating system (and halts the whole system when invoked).

This includes decompiling scripts users have posted in binary-only form. Under no circumstances are scripts to be decompiled unless the author grants their explicit permission and the script can be decompiled with the official decompiler. Are my compiled scripts safe? Any unscrupulous user may decompile your compiled script. There is not much you can do to stop decompilation. A determined user will get your source code if they truly want it.

Browse to the.exe compiled script and run the program. This should extract the.au3 script from the.exe.

A determined user will get your source code if they truly want it. I designed a counter-measure to break the 3rd-party decompiler, may I share it? It is theoretically possible to modify compiled scripts in a way that it still works but a decompiler fails to extract the source. However, tools that are capable of doing this violate the reverse engineering clause of the AutoIt license (the very same clause the 3rd-party decompiler violates).

Decompiling the.exe file reveals its source code. Step Determine if your script is compatible with the decompiler. According to AutoIt, its native decompiler supports scripts compiled with AutoIt v.3.2.5.1 and earlier. If the script was compiled with a later version of AutoIt, the decompiler will not work. Step Locate the decompiler. According to AutoIt, the decompiler program is usually installed at C: Program Files AutoIt3 Extras Exe2Aut Exe2Aut.exe.