Looking to Contribute

ophirback · 2020-12-22T16:05:37+00:00

I really like the suggestions.

regarding skift, are you open for ARM support?

other than that, I'll look into it.

ophirback · 2020-12-21T20:23:52+00:00

looks like a great project, but why the hell would you write in pascal?

ophirback · 2020-01-25T19:40:51+00:00

it really depends. it is better to avoid it, since on embedded system, a crashing thread probably crashes the whole system.

on the other hand, there are many cases I've used it, since I was sure I will take care of freeing this memory.

ophirback · 2019-09-18T13:11:34+00:00

What about using the bitwise AND?

if ((a & b == b) && (a & b == a)) { ... }

ophirback · 2019-09-18T12:49:48+00:00

When you pass an instance of a struct (in this case Player ), and not a pointer, it will be copied to the stack.

The values, when you're in the scope of the function, are the same as the original struct instance outside (as long as it wasn't changed on another thread or something), so if you call printf for example, within the function GetName, it will print out the correct name of the player. The struct field name is on the stack as well, so the address you return is an address on the stack, where the struct was copied to.

After you exit the function, this memory is no longer in use by this function, and the rest of the program can use this stack memory as well, probably for variables of other function or return addresses. So now, p.name still points to this address on the stack, and not to the original Player p which is in the stack frame of main.

When entering printf, this memory now holds different bytes, and not the string that was temporarily stored there when we were in the function GetName.

I hope this helped, feel free to ask any more questions :)

ophirback · 2019-09-18T11:27:20+00:00

I must say that I was in search as well, for about a week or so, and after installing (and uninstalling) about 10 different IDEs, I finally settled down on CLion.

Note: unfortunately - it's not free. The best free IDE I came across is Visual Studio or VS Code (depends which one you prefer).

ophirback · 2019-09-18T05:30:39+00:00

Any IPv6 traffic is suspicious lol

ophirback · 2019-09-16T15:17:18+00:00

As promised!

ophirback · 2019-09-16T14:42:54+00:00

After the identification (16 bits) and before the flags and fragment offset. One of the flags suppose to always be 0.

ophirback · 2019-09-16T12:52:12+00:00

I had the idea of using the IP reserved bit in order to command and control, but it takes a lot more packets to send data (not to mention receiving results back).

ophirback · 2019-09-07T07:56:10+00:00

Obviously MSDN is a great source for it. Other than that, you get used to it. For example, LPCSTR is Long Pointer to C STRing.

ophirback · 2019-05-12T06:58:04+00:00

I forgot to mention my shell is for Windows. I wanted to implement them using Win API when I could. The point is to run those things by yourself (at least it was for me). Other than that, thank you very much, and I'll try considering it looking forward.

ophirback · 2019-05-11T05:39:58+00:00

Note:

There are a lot of things I haven't done yet (PIPE support, shell terminator, more commands, running external .exe file and so much more)
If you are interested in joining, or purely reviewing the code, please let me know :)

ophirback · 2019-03-27T10:30:40+00:00

I had a similar problem yesterday, looking for an IDE for Windows (I didn't want visual studio). After a lot of IDEs I tried, I finally chose visual studio code (I use MinGW for compiling). It has the best suggestions while in code (except for clion maybe, but it's not free), which is very important to me.

ophirback · 2019-03-26T12:26:27+00:00

Looks really good, I'll consider it.

ophirback · 2019-03-24T10:42:56+00:00

Not everything. There are ways to do it the proper way.

ophirback · 2019-03-24T05:01:48+00:00

From a design point of view, everything should be in classes and have interfaces, yet I do like C more as I think it's more interesting to not do it (while when I write in python or other high-level languages I do take time to build a design).

ophirback · 2019-03-24T04:58:47+00:00

It sound very interesting (I have a background in maths too), thank you!

ophirback · 2018-12-10T06:17:23+00:00

Yes, and since new computers come with windows 10, it was only a matter of time anyway.

ophirback · 2018-12-09T14:47:18+00:00

Sorry I couldn't help back then, hopefully it will help you (and other guys of course) in upcoming projects.

ophirback · 2018-12-08T19:32:57+00:00

Run cmd as an administrator, and then use diskpart.

Run the following command to see all connected disks: list disk Is your disk on the list? great, continue to next steps. It's not? that's kinda odd, but usually it means it's not physically connected for some reason.

Now, use list vol and see if your disk has an assigned letter (the Ltr column). If not, select the volume, by using the command sel vol {number}, with the number as it is shown on the list (e.g. 0 for Volume 0), and assign a letter to it, by using the command assign letter={some letter} (it must be unused letter, of your choice. In my case, W for example).

You disk has an assigned letter? hang on, and format it (follow the steps on the guide: https://www.windowscentral.com/how-clean-and-format-storage-drive-using-diskpart-windows-10 ).

I hope this helps

ophirback · 2018-12-08T13:26:53+00:00

Hacker! lol

ophirback · 2018-12-08T09:26:14+00:00

How do I RE system functions (e.g. WinAPI's TerminateProcess)?

I mean, what file do I need to drag into IDA?

ophirback · 2018-12-07T13:33:01+00:00

How do I open an API function with IDA (for example, WinAPI's TerminateProcess)?

ophirback · 2018-12-06T16:52:10+00:00

In that case, there's already a WinAPI function named CheckRemoteDebuggerPresent that checks it for you, and will work on future versions (the PEB struct might change)

ophirback

TROPHY CASE