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Experimental JIT

BataBo
BataBo
in UnPackMe (.NET)

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Posted

Experimental JIT

I've been playing with jit recently and have created this crack me, try to find the correct key or unpack.

File Information

Submitter BataBo

Submitted 09/10/2021

Category UnPackMe (.NET)

View File

Experimental JIT

Edited by BataBo

Solved by SHADOW_UA

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  • Author

One user brought it to my attention that this assembly isn't running for him, do you have any issues executing it?

  • Solution

Code of Main method is pre-compiled (AOT) and stored in assembly resource. It is not possible to restore original MSIL code from this but since algorithm is very simple it can just be rewritten.

To get key we need to attach through x64dbg and analyze it dynamically. 

Spoiler

Laa8XZY.png.01e740ffc3cb9ed5b72fd6d8ba66124d.png

Final key is: 68 01 f6 c4 47 5b 04 ad ca 75 45 d2 2b f1 2c 28 or aAH2xEdbBK3KdUXSK/EsKA== in base64 format.

    • Like 2
    • Thanks 2
    • 11 months later...
    On 9/12/2021 at 6:01 PM, BataBo said:

    One user brought it to my attention that this assembly isn't running for him, do you have any issues executing it?

    same here. Tried to start it and it crashed. 

    Screenshot 2022-09-10 194507.jpg

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