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Extreme Coders
Posted

@muppet

Hmm. That's how I did as well. May be you're missing something else or doing some calculations twice.

Posted

Ok wopr really was broken.

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Posted

Hi again,

Which tools do you use to disassemble snake.nes file? 

Posted (edited)
  On 9/22/2019 at 9:11 AM, j0hn19 said:

Hi again,

Which tools do you use to disassemble snake.nes file? 

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@j0hn19 I used Mesen

Edited by moly
Posted

reloadered giving a "application was unable to start, error 0x0000007b" when trying to run.

No debugger attached or anything.

Is this part of the challenge or another broken challenge ? 😕

I would've thought executable challenges should work out of the box but perhaps exhibit this behavior when run under a debugger.

But run stand alone and crash?

 

Posted
  On 9/22/2019 at 6:50 PM, muppet said:

reloadered giving a "application was unable to start, error 0x0000007b" when trying to run.

No debugger attached or anything.

Is this part of the challenge or another broken challenge ? 😕

I would've thought executable challenges should work out of the box but perhaps exhibit this behavior when run under a debugger.

But run stand alone and crash?

 

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It works fine on my vm machines (windows 7 and windows 10)

Posted

So I would be stuck trying to static solve it.

I duno. I tried reinstalling VC redists, dotnet stuff. Everything that was a proposed solution I've tried it. (VMs are nice *click click clickety click*

But this is a FRESH install on a VM.

Still getting error 0x0000007b unable to run it.

Running in x32dbg and halting on DLL loads I can see 3 dlls getting loaded then it dies.

If I remember correctly the last DLL was apphelp.dll which is some compatibility stuff.

Will continue digging tomorrow but if anyone has any input.. Please! :)

I want to continue this challenge until time runs out not because of another broken challenge... 😞

 

Posted

Hello,

I'm stuck at mugatu. Can I please get a hint?

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Posted
  On 9/22/2019 at 8:18 PM, muppet said:

So I would be stuck trying to static solve it.

I duno. I tried reinstalling VC redists, dotnet stuff. Everything that was a proposed solution I've tried it. (VMs are nice *click click clickety click*

But this is a FRESH install on a VM.

Still getting error 0x0000007b unable to run it.

Running in x32dbg and halting on DLL loads I can see 3 dlls getting loaded then it dies.

If I remember correctly the last DLL was apphelp.dll which is some compatibility stuff.

Will continue digging tomorrow but if anyone has any input.. Please! :)

I want to continue this challenge until time runs out not because of another broken challenge... 😞

 

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@muppet - The setup I used to solve this was windows 7x64 inside vmware workstation. Infact I have multiple VM's (windows 10, win7 32bit etc) and the binary ran fine in all of them. Why dont you try downloading and extracting that challenge again

Posted (edited)

@noweileen - I wouldn't bother with nginx, setup a HTTP server with Python to make your life easier, something like (https://gist.github.com/bradmontgomery/2219997) but you are on the right track.

@muppet - Worked for me in Virtualbox Win10x64, I think your download or extraction got corrupted.

Edited by AeroX2
Posted
  On 9/21/2019 at 6:17 AM, adicto said:

Challenge 11, got me beat. 

 

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Update, finally got this. Google is your friend on this challenge.

Posted (edited)

For challenge 12 i have the dlls and the sys but cant seem to make heads or tails of them. When i try yo debug the dlls I always get to invalid address and then crash.

Update: turns out, its expecting an argument which is a pointer....still don't know what to do though

Edited by adicto
Posted (edited)

Update on reloadered. Was able to run it inside a Win7 x64 VM.

Same downloaded file for the challenge as in a Win10 where I get the error when trying to run.

Well.. f*** me. I was just able to run in a Win10 box as well. The cryptic message meant to download and install the VC runtime.

Not just any runtime. There was a specific one I found through someones else question on forum.

The first hit on vc runtime when searching was not right apparently cause with that one I continued receiving error.

Guess I will be able to try this one out after all.... in two days because thats when Ill be back at this computer again.

Probably wont make deadlines for this and the rest but at least I get to try them.

EDIT:

And yes I got both 32&64 bit of VCs whenever I downlaoded them so it was not that I chose the wrong one the previous time.

EDIT2:

And I only figured that out because in Win7 it started working after it complained speciiffically which runtime I needed instead of the error 0000007b.

Also fun fact. In XP the file is not recognized as an executable at all.

Edited by muppet
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Posted

Challenge 10 - mugatu

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Posted (edited)
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Edited by AeroX2
Posted (edited)

Hello all,

I'd appreciate your input on the dnschess challenge:

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Edited by drw0z0
Posted (edited)
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Challenge 10 - mugatu ^

Edited by noweileen
Posted

Challenge 10 - mugatu
My memory is a little bit fuzzy with this challenge and my VM keeps crashing but if I remember correctly

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Posted

Hi, I need a small hint for challenge 4 - Dnschess

Thank you

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Posted
  On 9/25/2019 at 2:53 PM, thega96 said:

Hi, I need a small hint for challenge 4 - Dnschess

Thank you

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Posted
  On 9/25/2019 at 2:56 PM, blank said:
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Thank you, I had forgot that little detail while reversing the AI.

Posted (edited)

Challenge 10 - mugatu

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Edited by noweileen
Posted

Can anyone recommend me a good tool for solving the system of equasions in wopr? My initial thought was to solve it with Gaussian elimination however it's only for addition, not XORing 😕

Posted (edited)

Stuck on 3, just because I cannot debug that apk in Android Studio.
I can see the device in adb devices

./adb devices
List of devices attached
emulator-5554	device

but in the debug window it just repeats the error

Waiting for application to come online: com.fireeye.flarebear

although the application is running in the emulator without any problems.
I just don't hit any breakpoints and cannot see the application in the "Attach Debugger to Android Process" window. 
Restarting the adb server, wiping the data from the device/emulator and switching to a different SDK did not help.

Did someone have the same problem before? Are there alternative GUIs to debug APKs? Which tools did you use?
I know that some ppl may be able to solve it simply by looking at the decompiled java code, but I need to look at it in a debugger.

Cheers & thanks

P.S. Congrats to kao (and all others who managed to solve all 12 challenges) ðŸ˜‰

Edited by Zulu

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